How do you detect Credit card type based on number

Question

I m trying to figure out how to detect the type of credit card based purely on its number  Does anyone know of a definitive  reliable way to find this

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The regular expression rules that match the respective card vendors     4 d 12     d 3     for VISA   5 1-5  d 14   for MasterCard   3 47  d 13   for AMEX      5020 5038 6304 6579 6761  d 12     d d    for Maestro   3   0 0-5   68  0-9   0-9  11   for Diners Club   6   011 5 0-9  2   0-9  12   for Discover   35 2-8  89  d d d 10   for JCB

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follow Luhn   s algorithm   private  boolean validateCreditCardNumber String str             int   ints   new int str length             for  int i   0  i  lt  str length    i                  ints i    Integer parseInt str substring i  i   1                      for  int i   ints length - 2  i  gt   0  i   i - 2                int j   ints i               j   j   2              if  j  gt  9                    j   j   10   1                            ints i    j                    int sum   0          for  int i   0  i  lt  ints length  i                  sum    ints i                     if  sum   10    0               return true            else               return false                     then call this method  Edittext mCreditCardNumberEt    mCreditCardNumberEt addTextChangedListener new TextWatcher                  Override             public void beforeTextChanged CharSequence s  int start  int count  int after                                 Override             public void onTextChanged CharSequence s  int start  int before  int count                  int cardcount    s toString   length                     if cardcount gt  16                        boolean cardnumbervalid    validateCreditCardNumber s toString                         if cardnumbervalid                            cardvalidtesting setText  Valid Card                            cardvalidtesting setTextColor ContextCompat getColor context R color green                                              else                           cardvalidtesting setText  Invalid Card                            cardvalidtesting setTextColor ContextCompat getColor context R color red                                                           else if cardcount gt 0  amp  amp cardcount lt 16                         cardvalidtesting setText  Invalid Card                         cardvalidtesting setTextColor ContextCompat getColor context R color red                                       else                       cardvalidtesting setText                                                           Override             public void afterTextChanged Editable s

User · Answer

The first numbers of the credit card can be used to approximate the vendor    Visa  49 44 or 47 Visa electron  42  45  48  49 MasterCard  51 Amex 34 Diners  30  36  38 JCB  35

User · Answer

Here is an example of some boolean functions written in Python that return True if the card is detected as per the function name    def is american express cc number          Checks if the card is an american express  If us billing address country code   amp  is amex  use vpos     https   en wikipedia org wiki Bank card number cite note-GenCardFeatures-3      param cc number  unicode card number             return bool re match r  3 47  0-9  13     cc number     def is visa cc number          Checks if the card is a visa  begins with 4 and 12 or 15 additional digits       param cc number  unicode card number                Standard Visa is 13 or 16  debit can be 19     if bool re match r  4   cc number   and len cc number  in  13  16  19           return True      return False   def is mastercard cc number          Checks if the card is a mastercard  Begins with 51-55 or 2221-2720 and 16 in length       param cc number  unicode card number             if len cc number     16 and cc number isdigit       Check digit  before cast to int         return bool re match r  5 1-5    cc number   or int cc number  4   in range 2221  2721      return False   def is discover cc number          Checks if the card is discover  re would be too hard to maintain  Not a supported card       param cc number  unicode card number             if len cc number     16          try                return bool cc number  4      6011  or cc number  2      65  or cc number  6  in range 622126  622926               return bool cc number  4      6011  or cc number  2      65  or 622126  lt   int cc number  6    lt   622925          except ValueError              return False     return False   def is jcb cc number          Checks if the card is a jcb  Not a supported card       param cc number  unicode card number               return bool re match r     2131 1800 35 d 3   d 11     cc number      wikipedia     return bool re match r  35 2 89   3-8  0-9   0-9  12     cc number      PawelDecowski   def is diners club cc number          Checks if the card is a diners club  Not a supported card       param cc number  unicode card number             return bool re match r  3   0 0-6   68  0-9   0-9  11     cc number      0-5   carte blance  6   international   def is laser cc number          Checks if the card is laser  Not a supported card       param cc number  unicode card number             return bool re match r   6304 670 69  6771    cc number     def is maestro cc number          Checks if the card is maestro  Not a supported card       param cc number  unicode card number             possible lengths    12  13  14  15  16  17  18  19      return bool re match r   50 5 6-9  6 0-9     cc number   and len cc number  in possible lengths     Child cards  def is visa electron cc number          Child of visa  Checks if the card is a visa electron  Not a supported card       param cc number  unicode card number             return bool re match r   4026 417500 4508 4844 491 3 7     cc number   and len cc number     16   def is total rewards visa cc number          Child of visa  Checks if the card is a Total Rewards Visa  Not a supported card       param cc number  unicode card number             return bool re match r  41277777 0-9  8     cc number     def is diners club carte blanche cc number          Child card of diners  Checks if the card is a diners club carte blance  Not a supported card       param cc number  unicode card number             return bool re match r  30 0-5  0-9  11     cc number      github PawelDecowski  jquery-creditcardvalidator   def is diners club carte international cc number          Child card of diners  Checks if the card is a diners club international  Not a supported card       param cc number  unicode card number             return bool re match r  36 0-9  12     cc number      jquery-creditcardvalidator

User · Answer

The credit debit card number is referred to as a PAN  or Primary Account Number   The first six digits of the PAN are taken from the IIN  or Issuer Identification Number  belonging to the issuing bank  IINs were previously known as BIN     Bank Identification Numbers     so you may see references to that terminology in some documents    These six digits are subject to an international standard  ISO IEC 7812  and can be used to determine the type of card from the number   Unfortunately the actual ISO IEC 7812 database is not publicly available  however  there are unofficial lists  both commercial and free  including on Wikipedia   Anyway  to detect the type from the number  you can use a regular expression like the ones below  Credit for original expressions  Visa   4 0-9  6    Visa card numbers start with a 4   MasterCard   5 1-5  0-9  5   222 1-9  0-9  3   22 3-9  0-9  4   2 3-6  0-9  5   27 01  0-9  4   2720 0-9  3    Before 2016  MasterCard numbers start with the numbers 51 through 55  but this will only detect MasterCard credit cards  there are other cards issued using the MasterCard system that do not fall into this IIN range   In 2016  they will add numbers in the range  222100-272099    American Express   3 47  0-9  5    American Express card numbers start with 34 or 37   Diners Club   3   0 0-5   68  0-9   0-9  4    Diners Club card numbers begin with 300 through 305  36 or 38  There are Diners Club cards that begin with 5 and have 16 digits  These are a joint venture between Diners Club and MasterCard and should be processed like a MasterCard   Discover   6   011 5 0-9  2   0-9  3    Discover card numbers begin with 6011 or 65   JCB      2131 1800 35 0-9  3   0-9  3    JCB cards begin with 2131  1800 or 35   Unfortunately  there are a number of card types processed with the MasterCard system that do not live in MasterCard   s IIN range  numbers starting 51   55   the most important case is that of Maestro cards  many of which have been issued from other banks    IIN ranges and so are located all over the number space   As a result  it may be best to assume that any card that is not of some other type you accept must be a MasterCard   Important  card numbers do vary in length  for instance  Visa has in the past issued cards with 13 digit PANs and cards with 16 digit PANs   Visa   s documentation currently indicates that it may issue or may have issued numbers with between 12 and 19 digits   Therefore  you should not check the length of the card number  other than to verify that it has at least 7 digits  for a complete IIN plus one check digit  which should match the value predicted by the Luhn algorithm    One further hint  before processing a cardholder PAN  strip any whitespace and punctuation characters from the input   Why   Because it   s typically much easier to enter the digits in groups  similar to how they   re displayed on the front of an actual credit card  i e   4444 4444 4444 4444   is much easier to enter correctly than  4444444444444444   There   s really no benefit in chastising the user because they   ve entered characters you don t expect here   This also implies making sure that your entry fields have room for at least 24 characters  otherwise users who enter spaces will run out of room   I   d recommend that you make the field wide enough to display 32 characters and allow up to 64  that gives plenty of headroom for expansion   Here s an image that gives a little more insight   UPDATE  2014   The checksum method no longer appears to be a valid way of verifying a card s authenticity as noted in the comments on this answer   UPDATE  2016   Mastercard is to implement new BIN ranges starting Ach Payment

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The first numbers of the credit card can be used to approximate the vendor    Visa  49 44 or 47 Visa electron  42  45  48  49 MasterCard  51 Amex 34 Diners  30  36  38 JCB  35

User · Answer

A javascript improve of  Anatoliy answer  x000D   x000D  function getCardType  number      const numberFormated   number replace   D g        var patterns         VISA    4 0-9  12     0-9  3           MASTER    5 1-5  0-9  14         AMEX    3 47  0-9  13         ELO        636368   438935   504175   451416   636297   d 0 10     5067   4576   4011   d 0 12          AURA     5078 d 2    d 2    d 11          JCB       2131 1800 35 d 3   d 11         DINERS    3   0 0-5   68  0-9   0-9  11         DISCOVERY    6   011 5 0-9  2   0-9  12         HIPERCARD     606282 d 10   d 3      3841 d 15          ELECTRON     4026 417500 4405 4508 4844 4913 4917  d         MAESTRO     5018 5020 5038 5612 5893 6304 6759 6761 6762 6763 0604 6390  d         DANKORT     5019  d         INTERPAYMENT     636  d         UNIONPAY     62 88  d           for  var key in patterns        if  patterns key  test numberFormated           return key              console log getCardType  4539 5684 7526 2091    x000D   x000D   x000D

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public string GetCreditCardType string CreditCardNumber        Regex regVisa   new Regex   4 0-9  12     0-9  3            Regex regMaster   new Regex   5 1-5  0-9  14          Regex regExpress   new Regex   3 47  0-9  13          Regex regDiners   new Regex   3   0 0-5   68  0-9   0-9  11          Regex regDiscover   new Regex   6   011 5 0-9  2   0-9  12          Regex regJCB   new Regex      2131 1800 35  d 3    d 11            if  regVisa IsMatch CreditCardNumber           return  VISA       else if  regMaster IsMatch CreditCardNumber           return  MASTER       else  if  regExpress IsMatch CreditCardNumber           return  AEXPRESS       else if  regDiners IsMatch CreditCardNumber           return  DINERS       else if  regDiscover IsMatch CreditCardNumber           return  DISCOVERS       else if  regJCB IsMatch CreditCardNumber           return  JCB       else         return  invalid       Here is the function to check Credit card type using Regex   c

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Updated  15th June 2016  as an ultimate solution currently   Please note that I even give vote up for the one is top voted  but to make it clear these are the regexps actually works i tested it with thousands of real BIN codes  The most important is to use start strings     otherwise it will give false results in real world   JCB     2131 1800 35  0-9  0    Start with  2131  1800  35  3528-3589   American Express  3 47  0-9  0    Start with  34  37  Diners Club  3   0 0-59  1   689   0-9  0    Start with  300-305  309  36  38-39  Visa  4 0-9  0    Start with  4  MasterCard   5 1-5  222 1-9  22 3-9  2 3-6  27 01  2720  0-9  0    Start with  2221-2720  51-55  Maestro   5 06789  6  0-9  0    Maestro always growing in the range  60-69  started with   not something else  but starting 5 must be encoded as mastercard anyway  Maestro cards must be detected in the end of the code because some others has in the range of 60-69  Please look at the code   Discover   6011 65 64 4-9  62212 6-9  6221 3-9  622 2-8  6229 01  62292 0-5   0-9  0    Discover quite difficult to code  start with  6011  622126-622925  644-649  65  In javascript I use this function  This is good when u assign it to an onkeyup event and it give result as soon as possible   function cc brand id cur val           the regular expressions check for possible matches as you type  hence the OR operators based on the number of chars        regexp string length  0  provided for soonest detection of beginning of the card numbers this way it could be used for BIN CODE detection also        JCB     jcb regex   new RegExp      2131 1800 35  0-9  0         2131  1800  35  3528-3589         American Express     amex regex   new RegExp   3 47  0-9  0         34  37        Diners Club     diners regex   new RegExp   3   0 0-59  1   689   0-9  0         300-305  309  36  38-39        Visa     visa regex   new RegExp   4 0-9  0         4        MasterCard     mastercard regex   new RegExp    5 1-5  222 1-9  22 3-9  2 3-6  27 01  2720  0-9  0         2221-2720  51-55     maestro regex   new RegExp    5 06789  6  0-9  0         always growing in the range  60-69  started with   not something else  but starting 5 must be encoded as mastercard anyway       Discover     discover regex   new RegExp    6011 65 64 4-9  62212 6-9  6221 3-9  622 2-8  6229 01  62292 0-5   0-9  0               6011  622126-622925  644-649  65          get rid of anything but numbers     cur val   cur val replace   D g               checks per each  as their could be multiple hits       fix  ordering matter in detection  otherwise can give false results in rare cases     var sel brand    unknown       if  cur val match jcb regex             sel brand    jcb         else if  cur val match amex regex             sel brand    amex         else if  cur val match diners regex             sel brand    diners club         else if  cur val match visa regex             sel brand    visa         else if  cur val match mastercard regex             sel brand    mastercard         else if  cur val match discover regex             sel brand    discover         else if  cur val match maestro regex             if  cur val 0      5       started 5 must be mastercard             sel brand    mastercard             else               sel brand    maestro     maestro is all 60-69 which is not something else  thats why this condition in the end                      return sel brand      Here you can play with it   http   jsfiddle net upN3L 69   For PHP use this function  this detects some sub VISA MC cards too           Obtain a brand constant from a PAN          param string  pan               Credit card number      param bool    include sub types Include detection of sub visa brands      return string      public static function getCardBrand  pan   include sub types   false          maximum length is not fixed now  there are growing number of CCs has more numbers in length  limiting can give false negatives atm        these regexps accept not whole cc numbers too       visa      visa regex      4 0-9  0            vpreca regex      428485 0-9  0            postepay regex       402360 402361 403035 417631 529948  0            cartasi regex       432917 432930 453998  0-9  0            entropay regex       406742 410162 431380 459061 533844 522093  0-9  0            o2money regex       422793 475743  0-9  0               MasterCard      mastercard regex       5 1-5  222 1-9  22 3-9  2 3-6  27 01  2720  0-9  0            maestro regex       5 06789  6  0-9  0            kukuruza regex      525477 0-9  0            yunacard regex      541275 0-9  0               American Express      amex regex      3 47  0-9  0               Diners Club      diners regex      3   0 0-59  1   689   0-9  0              Discover      discover regex       6011 65 64 4-9  62212 6-9  6221 3-9  622 2-8  6229 01  62292 0-5   0-9  0              JCB      jcb regex         2131 1800 35  0-9  0              ordering matter in detection  otherwise can give false results in rare cases     if  preg match  jcb regex   pan             return  jcb              if  preg match  amex regex   pan             return  amex              if  preg match  diners regex   pan             return  diners club                sub visa mastercard cards     if   include sub types            if  preg match  vpreca regex   pan                 return  v-preca                     if  preg match  postepay regex   pan                 return  postepay                     if  preg match  cartasi regex   pan                 return  cartasi                     if  preg match  entropay regex   pan                 return  entropay                     if  preg match  o2money regex   pan                 return  o2money                     if  preg match  kukuruza regex   pan                 return  kukuruza                     if  preg match  yunacard regex   pan                 return  yunacard                        if  preg match  visa regex   pan             return  visa              if  preg match  mastercard regex   pan             return  mastercard              if  preg match  discover regex   pan             return  discover              if  preg match  maestro regex   pan             if   pan 0      5       started 5 must be mastercard             return  mastercard                     return  maestro     maestro is all 60-69 which is not something else  thats why this condition in the end             return  unknown     unknown for this system

User · Answer

Here is an example of some boolean functions written in Python that return True if the card is detected as per the function name    def is american express cc number          Checks if the card is an american express  If us billing address country code   amp  is amex  use vpos     https   en wikipedia org wiki Bank card number cite note-GenCardFeatures-3      param cc number  unicode card number             return bool re match r  3 47  0-9  13     cc number     def is visa cc number          Checks if the card is a visa  begins with 4 and 12 or 15 additional digits       param cc number  unicode card number                Standard Visa is 13 or 16  debit can be 19     if bool re match r  4   cc number   and len cc number  in  13  16  19           return True      return False   def is mastercard cc number          Checks if the card is a mastercard  Begins with 51-55 or 2221-2720 and 16 in length       param cc number  unicode card number             if len cc number     16 and cc number isdigit       Check digit  before cast to int         return bool re match r  5 1-5    cc number   or int cc number  4   in range 2221  2721      return False   def is discover cc number          Checks if the card is discover  re would be too hard to maintain  Not a supported card       param cc number  unicode card number             if len cc number     16          try                return bool cc number  4      6011  or cc number  2      65  or cc number  6  in range 622126  622926               return bool cc number  4      6011  or cc number  2      65  or 622126  lt   int cc number  6    lt   622925          except ValueError              return False     return False   def is jcb cc number          Checks if the card is a jcb  Not a supported card       param cc number  unicode card number               return bool re match r     2131 1800 35 d 3   d 11     cc number      wikipedia     return bool re match r  35 2 89   3-8  0-9   0-9  12     cc number      PawelDecowski   def is diners club cc number          Checks if the card is a diners club  Not a supported card       param cc number  unicode card number             return bool re match r  3   0 0-6   68  0-9   0-9  11     cc number      0-5   carte blance  6   international   def is laser cc number          Checks if the card is laser  Not a supported card       param cc number  unicode card number             return bool re match r   6304 670 69  6771    cc number     def is maestro cc number          Checks if the card is maestro  Not a supported card       param cc number  unicode card number             possible lengths    12  13  14  15  16  17  18  19      return bool re match r   50 5 6-9  6 0-9     cc number   and len cc number  in possible lengths     Child cards  def is visa electron cc number          Child of visa  Checks if the card is a visa electron  Not a supported card       param cc number  unicode card number             return bool re match r   4026 417500 4508 4844 491 3 7     cc number   and len cc number     16   def is total rewards visa cc number          Child of visa  Checks if the card is a Total Rewards Visa  Not a supported card       param cc number  unicode card number             return bool re match r  41277777 0-9  8     cc number     def is diners club carte blanche cc number          Child card of diners  Checks if the card is a diners club carte blance  Not a supported card       param cc number  unicode card number             return bool re match r  30 0-5  0-9  11     cc number      github PawelDecowski  jquery-creditcardvalidator   def is diners club carte international cc number          Child card of diners  Checks if the card is a diners club international  Not a supported card       param cc number  unicode card number             return bool re match r  36 0-9  12     cc number      jquery-creditcardvalidator

User · Answer

Just a little spoon feeding       CreditCardNumber   focusout function                var regVisa     4 0-9  12     0-9  3               var regMasterCard     5 1-5  0-9  14             var regAmex     3 47  0-9  13             var regDiscover     6   011 5 0-9  2   0-9  12              if  regVisa test   this  val                       CCImage   html   lt img height  40px  src   Url Content    images visa png    gt                                   else if  regMasterCard test   this  val                   CCImage   html   lt img height  40px  src   Url Content    images mastercard png    gt                         else if  regAmex test   this  val                       CCImage   html   lt img height  40px  src   Url Content    images amex png    gt                         else if  regDiscover test   this  val                       CCImage   html   lt img height  40px  src   Url Content    images discover png    gt                        else               CCImage   html  NA

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follow Luhn   s algorithm   private  boolean validateCreditCardNumber String str             int   ints   new int str length             for  int i   0  i  lt  str length    i                  ints i    Integer parseInt str substring i  i   1                      for  int i   ints length - 2  i  gt   0  i   i - 2                int j   ints i               j   j   2              if  j  gt  9                    j   j   10   1                            ints i    j                    int sum   0          for  int i   0  i  lt  ints length  i                  sum    ints i                     if  sum   10    0               return true            else               return false                     then call this method  Edittext mCreditCardNumberEt    mCreditCardNumberEt addTextChangedListener new TextWatcher                  Override             public void beforeTextChanged CharSequence s  int start  int count  int after                                 Override             public void onTextChanged CharSequence s  int start  int before  int count                  int cardcount    s toString   length                     if cardcount gt  16                        boolean cardnumbervalid    validateCreditCardNumber s toString                         if cardnumbervalid                            cardvalidtesting setText  Valid Card                            cardvalidtesting setTextColor ContextCompat getColor context R color green                                              else                           cardvalidtesting setText  Invalid Card                            cardvalidtesting setTextColor ContextCompat getColor context R color red                                                           else if cardcount gt 0  amp  amp cardcount lt 16                         cardvalidtesting setText  Invalid Card                         cardvalidtesting setTextColor ContextCompat getColor context R color red                                       else                       cardvalidtesting setText                                                           Override             public void afterTextChanged Editable s

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Compact javascript version      var getCardType   function  number            var cards                 visa    4 0-9  12     0-9  3                   mastercard    5 1-5  0-9  14                 amex    3 47  0-9  13                 diners    3   0 0-5   68  0-9   0-9  11                 discover    6   011 5 0-9  2   0-9  12                 jcb       2131 1800 35 d 3   d 11                       for  var card in cards                if  cards card  test number                     return card

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The first numbers of the credit card can be used to approximate the vendor    Visa  49 44 or 47 Visa electron  42  45  48  49 MasterCard  51 Amex 34 Diners  30  36  38 JCB  35

User · Answer

Try this for kotlin  Add Regex and add to the when statement   private fun getCardType number  String   String            val visa   Regex   4 0-9  12     0-9  3               val mastercard   Regex   5 1-5  0-9  14             val amx   Regex   3 47  0-9  13              return when               visa matches number  - gt   Visa              mastercard matches number  - gt   Mastercard              amx matches number  - gt   American Express              else - gt   Unknown

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function GetCreditCardBrand CardNumber  string   string  begin   if TRegEx IsMatch CardNumber   4 0-9  12     0-9  3       then     Result     visa    else if TRegEx IsMatch CardNumber   5 1-5  0-9  14     then     Result     master    else if TRegEx IsMatch CardNumber   3 47  0-9  13     then     Result     express    else if TRegEx IsMatch CardNumber   3   0 0-5   68  0-9   0-9  11     then     Result     diners    else if TRegEx IsMatch CardNumber   6   011 5 0-9  2   0-9  12     then     Result     discover    else if TRegEx IsMatch CardNumber      2131 1800 35  d 3    d 11     then     Result     jcb  end   Here is the function to check Credit card type using Regex   delphi

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The credit debit card number is referred to as a PAN  or Primary Account Number   The first six digits of the PAN are taken from the IIN  or Issuer Identification Number  belonging to the issuing bank  IINs were previously known as BIN     Bank Identification Numbers     so you may see references to that terminology in some documents    These six digits are subject to an international standard  ISO IEC 7812  and can be used to determine the type of card from the number   Unfortunately the actual ISO IEC 7812 database is not publicly available  however  there are unofficial lists  both commercial and free  including on Wikipedia   Anyway  to detect the type from the number  you can use a regular expression like the ones below  Credit for original expressions  Visa   4 0-9  6    Visa card numbers start with a 4   MasterCard   5 1-5  0-9  5   222 1-9  0-9  3   22 3-9  0-9  4   2 3-6  0-9  5   27 01  0-9  4   2720 0-9  3    Before 2016  MasterCard numbers start with the numbers 51 through 55  but this will only detect MasterCard credit cards  there are other cards issued using the MasterCard system that do not fall into this IIN range   In 2016  they will add numbers in the range  222100-272099    American Express   3 47  0-9  5    American Express card numbers start with 34 or 37   Diners Club   3   0 0-5   68  0-9   0-9  4    Diners Club card numbers begin with 300 through 305  36 or 38  There are Diners Club cards that begin with 5 and have 16 digits  These are a joint venture between Diners Club and MasterCard and should be processed like a MasterCard   Discover   6   011 5 0-9  2   0-9  3    Discover card numbers begin with 6011 or 65   JCB      2131 1800 35 0-9  3   0-9  3    JCB cards begin with 2131  1800 or 35   Unfortunately  there are a number of card types processed with the MasterCard system that do not live in MasterCard   s IIN range  numbers starting 51   55   the most important case is that of Maestro cards  many of which have been issued from other banks    IIN ranges and so are located all over the number space   As a result  it may be best to assume that any card that is not of some other type you accept must be a MasterCard   Important  card numbers do vary in length  for instance  Visa has in the past issued cards with 13 digit PANs and cards with 16 digit PANs   Visa   s documentation currently indicates that it may issue or may have issued numbers with between 12 and 19 digits   Therefore  you should not check the length of the card number  other than to verify that it has at least 7 digits  for a complete IIN plus one check digit  which should match the value predicted by the Luhn algorithm    One further hint  before processing a cardholder PAN  strip any whitespace and punctuation characters from the input   Why   Because it   s typically much easier to enter the digits in groups  similar to how they   re displayed on the front of an actual credit card  i e   4444 4444 4444 4444   is much easier to enter correctly than  4444444444444444   There   s really no benefit in chastising the user because they   ve entered characters you don t expect here   This also implies making sure that your entry fields have room for at least 24 characters  otherwise users who enter spaces will run out of room   I   d recommend that you make the field wide enough to display 32 characters and allow up to 64  that gives plenty of headroom for expansion   Here s an image that gives a little more insight   UPDATE  2014   The checksum method no longer appears to be a valid way of verifying a card s authenticity as noted in the comments on this answer   UPDATE  2016   Mastercard is to implement new BIN ranges starting Ach Payment

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Swift 2 1 Version of Usman Y s answer  Use a print statement to verify so call by some string value  print self validateCardType self creditCardField text     func validateCardType testCard  String  - gt  String        let regVisa     4 0-9  12     0-9  3          let regMaster     5 1-5  0-9  14        let regExpress     3 47  0-9  13        let regDiners     3   0 0-5   68  0-9   0-9  11        let regDiscover     6   011 5 0-9  2   0-9  12        let regJCB        2131 1800 35  d 3    d 11          let regVisaTest   NSPredicate format   SELF MATCHES      regVisa      let regMasterTest   NSPredicate format   SELF MATCHES      regMaster      let regExpressTest   NSPredicate format   SELF MATCHES      regExpress      let regDinersTest   NSPredicate format   SELF MATCHES      regDiners      let regDiscoverTest   NSPredicate format   SELF MATCHES      regDiscover      let regJCBTest   NSPredicate format   SELF MATCHES      regJCB        if regVisaTest evaluateWithObject testCard           return  Visa            else if regMasterTest evaluateWithObject testCard           return  MasterCard             else if regExpressTest evaluateWithObject testCard           return  American Express             else if regDinersTest evaluateWithObject testCard           return  Diners Club             else if regDiscoverTest evaluateWithObject testCard           return  Discover             else if regJCBTest evaluateWithObject testCard           return  JCB             return

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Compact javascript version      var getCardType   function  number            var cards                 visa    4 0-9  12     0-9  3                   mastercard    5 1-5  0-9  14                 amex    3 47  0-9  13                 diners    3   0 0-5   68  0-9   0-9  11                 discover    6   011 5 0-9  2   0-9  12                 jcb       2131 1800 35 d 3   d 11                       for  var card in cards                if  cards card  test number                     return card

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The first numbers of the credit card can be used to approximate the vendor    Visa  49 44 or 47 Visa electron  42  45  48  49 MasterCard  51 Amex 34 Diners  30  36  38 JCB  35

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recently I needed such functionality  I was porting Zend Framework Credit Card Validator to ruby  ruby gem  https   github com Fivell credit card validations  zend framework  https   github com zendframework zf2 blob master library Zend Validator CreditCard php  They both use INN ranges for detecting type  Here you can read about INN  According to this you can detect credit card alternatively   without regexps but declaring some rules about prefixes and possible length   So we have next rules for most used cards            most used brands                visa             length   13  16   prefixes    4               mastercard             length   16   prefixes    51    52    53    54    55                amex             length   15   prefixes    34    37                        other brands              diners             length   14   prefixes    300    301    302    303    304    305    36    38                  There are Diners Club  North America  cards that begin with 5  These are a joint venture between Diners Club and MasterCard  and are processed like a MasterCard       will be removed in next major version      diners us             length   16   prefixes    54    55                discover             length   16   prefixes    6011    644    645    646    647    648                                      649    65                jcb             length   16   prefixes    3528    3529    353    354    355    356    357    358    1800    2131                 laser             length   16  17  18  19   prefixes    6304    6706    6771                solo             length   16  18  19   prefixes    6334    6767                switch             length   16  18  19   prefixes    633110    633312    633304    633303    633301    633300                 maestro             length   12  13  14  15  16  17  18  19   prefixes    5010    5011    5012    5013    5014    5015    5016    5017    5018                                                                  502    503    504    505    506    507    508                                                                  6012    6013    6014    6015    6016    6017    6018    6019                                                                  602    603    604    605    6060                                                                  677    675    674    673    672    671    670                                                                  6760    6761    6762    6763    6764    6765    6766    6768    6769                  Luhn validation are skipped for union pay cards because they have unknown generation algoritm     unionpay             length   16  17  18  19   prefixes    622    624    625    626    628    skip luhn  true              dankrot             length   16   prefixes    5019                rupay             length   16   prefixes    6061    6062    6063    6064    6065    6066    6067    6068    6069    607    608    skip luhn  true             Then  by searching prefix and comparing length you can detect credit card brand  Also don t forget about luhn algoritm  it is descibed here http   en wikipedia org wiki Luhn    UPDATE   updated list of rules can be found here https   raw githubusercontent com Fivell credit card validations master lib data brands yaml

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The regular expression rules that match the respective card vendors     4 d 12     d 3     for VISA   5 1-5  d 14   for MasterCard   3 47  d 13   for AMEX      5020 5038 6304 6579 6761  d 12     d d    for Maestro   3   0 0-5   68  0-9   0-9  11   for Diners Club   6   011 5 0-9  2   0-9  12   for Discover   35 2-8  89  d d d 10   for JCB

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Check this out   http   www breakingpar com bkp home nsf 0 87256B280015193F87256CC70060A01B  function isValidCreditCard type  ccnum           Visa  length 16  prefix 4  dashes optional      Mastercard  length 16  prefix 51-55  dashes optional      Discover  length 16  prefix 6011  dashes optional      American Express  length 15  prefix 34 or 37      Diners  length 14  prefix 30  36  or 38          var re   new Regex            visa      4 d 3 -  d 4 -  d 4 -  d            mc      5 1-5  d 2 -  d 4 -  d 4 -  d 4               disc      6011-  d 4 -  d 4 -  d 4               amex      3 47  d 13               diners      3 068  d 12           type toLowerCase          if   re test ccnum   return false         Remove all dashes for the checksum checks to eliminate negative numbers     ccnum   ccnum split  -   join             Checksum   Mod 10          Add even digits in even length strings or odd digits in odd length strings      var checksum   0      for  var i    2 -  ccnum length   2    i  lt   ccnum length  i    2            checksum    parseInt ccnum charAt i - 1                 Analyze odd digits in even length strings or even digits in odd length strings      for  var i    ccnum length   2    1  i  lt  ccnum length  i    2            var digit   parseInt ccnum charAt i - 1     2          if  digit  lt  10    checksum    digit    else   checksum     digit - 9               if   checksum   10     0  return true      else return false

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Stripe has provided this fantastic javascript library for card scheme detection  Let me add few code snippets and show you how to use it    Firstly Include it to your web page as   lt script type  text javascript  src  https   cdnjs cloudflare com ajax libs jquery payment 1 2 3 jquery payment js    gt  lt  script gt    Secondly use the function cardType for detecting the card scheme     document  ready function                               var type     payment cardType  4242 4242 4242 4242      test card number             console log type                                             Here are the reference links for more examples and demos    Stripe blog for jquery payment js Github repository

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I use https   github com bendrucker creditcards-types  to detect the credit card type from number  One issue I ran into is discover test number 6011 1111 1111 1117  from https   www cybersource com developers other resources quick references test cc numbers  we can see it is a discover number because it starts by 6011  But the result I get from the creditcards-types is  Maestro   I opened the issue to the author  He replied me very soon and provide this pdf doc https   www discovernetwork com downloads IPP VAR Compliance pdf From the doc we can see clearly that 6011 1111 1111 1117 does not fall into the range of discover credit card

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Just a little spoon feeding       CreditCardNumber   focusout function                var regVisa     4 0-9  12     0-9  3               var regMasterCard     5 1-5  0-9  14             var regAmex     3 47  0-9  13             var regDiscover     6   011 5 0-9  2   0-9  12              if  regVisa test   this  val                       CCImage   html   lt img height  40px  src   Url Content    images visa png    gt                                   else if  regMasterCard test   this  val                   CCImage   html   lt img height  40px  src   Url Content    images mastercard png    gt                         else if  regAmex test   this  val                       CCImage   html   lt img height  40px  src   Url Content    images amex png    gt                         else if  regDiscover test   this  val                       CCImage   html   lt img height  40px  src   Url Content    images discover png    gt                        else               CCImage   html  NA

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I searched around quite a bit for credit card formatting and phone number formatting   Found lots of good tips but nothing really suited my exact desires so I created this bit of code   You use it like this   var sf   smartForm formatCC myInputString   var cardType   sf cardType

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The credit debit card number is referred to as a PAN  or Primary Account Number   The first six digits of the PAN are taken from the IIN  or Issuer Identification Number  belonging to the issuing bank  IINs were previously known as BIN     Bank Identification Numbers     so you may see references to that terminology in some documents    These six digits are subject to an international standard  ISO IEC 7812  and can be used to determine the type of card from the number   Unfortunately the actual ISO IEC 7812 database is not publicly available  however  there are unofficial lists  both commercial and free  including on Wikipedia   Anyway  to detect the type from the number  you can use a regular expression like the ones below  Credit for original expressions  Visa   4 0-9  6    Visa card numbers start with a 4   MasterCard   5 1-5  0-9  5   222 1-9  0-9  3   22 3-9  0-9  4   2 3-6  0-9  5   27 01  0-9  4   2720 0-9  3    Before 2016  MasterCard numbers start with the numbers 51 through 55  but this will only detect MasterCard credit cards  there are other cards issued using the MasterCard system that do not fall into this IIN range   In 2016  they will add numbers in the range  222100-272099    American Express   3 47  0-9  5    American Express card numbers start with 34 or 37   Diners Club   3   0 0-5   68  0-9   0-9  4    Diners Club card numbers begin with 300 through 305  36 or 38  There are Diners Club cards that begin with 5 and have 16 digits  These are a joint venture between Diners Club and MasterCard and should be processed like a MasterCard   Discover   6   011 5 0-9  2   0-9  3    Discover card numbers begin with 6011 or 65   JCB      2131 1800 35 0-9  3   0-9  3    JCB cards begin with 2131  1800 or 35   Unfortunately  there are a number of card types processed with the MasterCard system that do not live in MasterCard   s IIN range  numbers starting 51   55   the most important case is that of Maestro cards  many of which have been issued from other banks    IIN ranges and so are located all over the number space   As a result  it may be best to assume that any card that is not of some other type you accept must be a MasterCard   Important  card numbers do vary in length  for instance  Visa has in the past issued cards with 13 digit PANs and cards with 16 digit PANs   Visa   s documentation currently indicates that it may issue or may have issued numbers with between 12 and 19 digits   Therefore  you should not check the length of the card number  other than to verify that it has at least 7 digits  for a complete IIN plus one check digit  which should match the value predicted by the Luhn algorithm    One further hint  before processing a cardholder PAN  strip any whitespace and punctuation characters from the input   Why   Because it   s typically much easier to enter the digits in groups  similar to how they   re displayed on the front of an actual credit card  i e   4444 4444 4444 4444   is much easier to enter correctly than  4444444444444444   There   s really no benefit in chastising the user because they   ve entered characters you don t expect here   This also implies making sure that your entry fields have room for at least 24 characters  otherwise users who enter spaces will run out of room   I   d recommend that you make the field wide enough to display 32 characters and allow up to 64  that gives plenty of headroom for expansion   Here s an image that gives a little more insight   UPDATE  2014   The checksum method no longer appears to be a valid way of verifying a card s authenticity as noted in the comments on this answer   UPDATE  2016   Mastercard is to implement new BIN ranges starting Ach Payment

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function GetCreditCardBrand CardNumber  string   string  begin   if TRegEx IsMatch CardNumber   4 0-9  12     0-9  3       then     Result     visa    else if TRegEx IsMatch CardNumber   5 1-5  0-9  14     then     Result     master    else if TRegEx IsMatch CardNumber   3 47  0-9  13     then     Result     express    else if TRegEx IsMatch CardNumber   3   0 0-5   68  0-9   0-9  11     then     Result     diners    else if TRegEx IsMatch CardNumber   6   011 5 0-9  2   0-9  12     then     Result     discover    else if TRegEx IsMatch CardNumber      2131 1800 35  d 3    d 11     then     Result     jcb  end   Here is the function to check Credit card type using Regex   delphi

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In Card Range Recognition  CRR   a drawback with algorithms that use a series of regex or other hard-coded ranges  is that the BINs IINs do change over time in my experience   The co-branding of cards is an ongoing complication   Different Card Acquirers   merchants may need you treat the same card differently  depending on e g  geolocation     Additionally  in the last few years with e g  UnionPay cards in wider circulation  existing models do not cope with  new ranges that sometimes interleave with broader ranges that they supersede  Knowing the geography your system needs to cover may help  as some ranges are restricted to use in particular countries   For example  ranges 62 include some AAA sub-ranges in the US  but if your merchant base is outside the US  you may be able to treat all 62 as UnionPay  You may be also asked to treat a card differently based on merchant location   E g  to treat certain UK cards as debit domestically  but as credit internationally     There are very useful set of rules maintained by one major Acquiring Bank   E g  https   www barclaycard co uk business files BIN-Rules-EIRE pdf and https   www barclaycard co uk business files BIN-Rules-UK pdf    Valid links as of June 2017  thanks to the user who provided a link to updated reference   But be aware of the caveat that  while these CRR rules may represent the Card Issuing universe as it applies to the merchants acquired by that entity  it does not include e g  ranges identified as CUP UPI   These comments apply to magnetic stripe  MagStripe  or PKE  Pan Key Entry  scenarios  The situation is different again in the ICC EMV world   Update  Other answers on this page  and also the linked WikiPedia page  have JCB as always 16 long   However  in my company we have a dedicated team of engineers who certify our POS devices and software across multiple acquiring banks and geographies   The most recent Certification Pack of cards this team have from JCB  had a pass case for a 19 long PAN

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My solution with jQuery   function detectCreditCardType         var type   new Array      type 1      4 0-9  12     0-9  3               visa     type 2      5 1-5  0-9  14                     mastercard     type 3      6   011 5 0-9  2   0-9  12         discover     type 4      3 47  0-9  13                      amex      var ccnum       creditcard   val   replace     d   g           var returntype   0         each type  function idx  re            var regex   new RegExp re           if regex test ccnum   amp  amp  idx gt 0                returntype   idx                         return returntype      In case 0 is returned  credit card type is undetected    creditcard  class should be added to the credit card input field

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abobjects com  parvez ahmad ab bulk mailer use below script  function isValidCreditCard2 type  ccnum           if  type     Visa                  Visa  length 16  prefix 4  dashes optional            var re     4 d 3   d 4   d 4   d 4              else if  type     MasterCard                  Mastercard  length 16  prefix 51-55  dashes optional            var re     5 1-5  d 2   d 4   d 4   d 4              else if  type     Discover                  Discover  length 16  prefix 6011  dashes optional            var re     6011  d 4   d 4   d 4              else if  type     AmEx                  American Express  length 15  prefix 34 or 37            var re     3 4 7  d 13              else if  type     Diners                  Diners  length 14  prefix 30  36  or 38            var re     3 0 6 8  d 12                     if   re test ccnum   return false         return true                      Remove all dashes for the checksum checks to eliminate negative numbers        ccnum   ccnum split  -   join                Checksum   Mod 10             Add even digits in even length strings or odd digits in odd length strings         var checksum   0         for  var i  2- ccnum length   2    i lt  ccnum length  i  2              checksum    parseInt ccnum charAt i-1                       Analyze odd digits in even length strings or even digits in odd length strings         for  var i  ccnum length   2    1  i lt ccnum length  i  2              var digit   parseInt ccnum charAt i-1     2            if  digit  lt  10    checksum    digit    else   checksum     digit-9                     if   checksum   10     0  return true  else return false                   jQuery validator addMethod  isValidCreditCard   function postalcode  element         return isValidCreditCard2     cardType   val        cardNum   val            lt br gt credit card is invalid           Type lt  td gt                                             lt td class  text  gt  amp nbsp   lt form select path  cardType  cssclass  fields  style  border  1px solid  D5D5D5 padding  0px 0px 0px 0px width  130px height  22px   gt                                                 lt option value  SELECT  gt SELECT lt  option gt                                                 lt option value  MasterCard  gt Mastercard lt  option gt                                                 lt option value  Visa  gt Visa lt  option gt                                                  lt option value  AmEx  gt American Express lt  option gt                                                 lt option value  Discover  gt Discover lt  option gt                                               lt  form select gt   lt font color   FF0000  gt   lt  font gt        signupForm   validate        rules          companyName  required  true          address1  required  true          city  required  true          state  required  true          zip  required  true          country  required  true          chkAgree  required  true          confPassword  required  true          lastName  required  true          firstName  required  true          ccAddress1  required  true          ccZip                       postalcode   true                  phone  required  true          email              required  true             email  true                      userName              required  true             minlength  6                      password              required  true             minlength  6                                cardNum                          isValidCreditCard   true

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I use https   github com bendrucker creditcards-types  to detect the credit card type from number  One issue I ran into is discover test number 6011 1111 1111 1117  from https   www cybersource com developers other resources quick references test cc numbers  we can see it is a discover number because it starts by 6011  But the result I get from the creditcards-types is  Maestro   I opened the issue to the author  He replied me very soon and provide this pdf doc https   www discovernetwork com downloads IPP VAR Compliance pdf From the doc we can see clearly that 6011 1111 1111 1117 does not fall into the range of discover credit card

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Try this For swift   func checkCardValidation number   String  - gt  Bool       let reversedInts   number characters reversed   map   Int String  0             return reversedInts enumerated   reduce 0    sum  val  in             let odd   val offset   2    1             return sum    odd    val element     9   9    val element    2    9    val element                10    0     Use   if  self checkCardValidation number   yourNumber      true         print  Card Number valid    else       print  Card Number not valid

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Here s Complete C  or VB code for all kinds of CC related things on codeproject    IsValidNumber GetCardTypeFromNumber GetCardTestNumber PassesLuhnTest   This article has been up for a couple years with no negative comments

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My solution with jQuery   function detectCreditCardType         var type   new Array      type 1      4 0-9  12     0-9  3               visa     type 2      5 1-5  0-9  14                     mastercard     type 3      6   011 5 0-9  2   0-9  12         discover     type 4      3 47  0-9  13                      amex      var ccnum       creditcard   val   replace     d   g           var returntype   0         each type  function idx  re            var regex   new RegExp re           if regex test ccnum   amp  amp  idx gt 0                returntype   idx                         return returntype      In case 0 is returned  credit card type is undetected    creditcard  class should be added to the credit card input field

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recently I needed such functionality  I was porting Zend Framework Credit Card Validator to ruby  ruby gem  https   github com Fivell credit card validations  zend framework  https   github com zendframework zf2 blob master library Zend Validator CreditCard php  They both use INN ranges for detecting type  Here you can read about INN  According to this you can detect credit card alternatively   without regexps but declaring some rules about prefixes and possible length   So we have next rules for most used cards            most used brands                visa             length   13  16   prefixes    4               mastercard             length   16   prefixes    51    52    53    54    55                amex             length   15   prefixes    34    37                        other brands              diners             length   14   prefixes    300    301    302    303    304    305    36    38                  There are Diners Club  North America  cards that begin with 5  These are a joint venture between Diners Club and MasterCard  and are processed like a MasterCard       will be removed in next major version      diners us             length   16   prefixes    54    55                discover             length   16   prefixes    6011    644    645    646    647    648                                      649    65                jcb             length   16   prefixes    3528    3529    353    354    355    356    357    358    1800    2131                 laser             length   16  17  18  19   prefixes    6304    6706    6771                solo             length   16  18  19   prefixes    6334    6767                switch             length   16  18  19   prefixes    633110    633312    633304    633303    633301    633300                 maestro             length   12  13  14  15  16  17  18  19   prefixes    5010    5011    5012    5013    5014    5015    5016    5017    5018                                                                  502    503    504    505    506    507    508                                                                  6012    6013    6014    6015    6016    6017    6018    6019                                                                  602    603    604    605    6060                                                                  677    675    674    673    672    671    670                                                                  6760    6761    6762    6763    6764    6765    6766    6768    6769                  Luhn validation are skipped for union pay cards because they have unknown generation algoritm     unionpay             length   16  17  18  19   prefixes    622    624    625    626    628    skip luhn  true              dankrot             length   16   prefixes    5019                rupay             length   16   prefixes    6061    6062    6063    6064    6065    6066    6067    6068    6069    607    608    skip luhn  true             Then  by searching prefix and comparing length you can detect credit card brand  Also don t forget about luhn algoritm  it is descibed here http   en wikipedia org wiki Luhn    UPDATE   updated list of rules can be found here https   raw githubusercontent com Fivell credit card validations master lib data brands yaml

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The first six digits of a card number  including the initial MII   digit  are known as the issuer identification number  IIN   These   identify the card issuing institution that issued the card to the card   holder  The rest of the number is allocated by the card issuer  The   card number s length is its number of digits  Many card issuers print   the entire IIN and account number on their card    Based on the above facts I would like to keep a snippet of JAVA code to identify card brand      Sample card types   public static final String AMERICAN EXPRESS    American Express   public static final String DISCOVER    Discover   public static final String JCB    JCB   public static final String DINERS CLUB    Diners Club   public static final String VISA    Visa   public static final String MASTERCARD    MasterCard   public static final String UNKNOWN    Unknown        Card Prefixes      Based on http   en wikipedia org wiki Bank card number Issuer identification number  28IIN 29 public static final String   PREFIXES AMERICAN EXPRESS     34    37    public static final String   PREFIXES DISCOVER     60    62    64    65    public static final String   PREFIXES JCB     35    public static final String   PREFIXES DINERS CLUB     300    301    302    303    304    305    309    36    38    39    public static final String   PREFIXES VISA     4    public static final String   PREFIXES MASTERCARD              2221    2222    2223    2224    2225    2226    2227    2228    2229            223    224    225    226    227    228    229            23    24    25    26            270    271    2720            50    51    52    53    54    55              Check to see if the input number has any of the given prefixes    public String getBrand String number     String evaluatedType  if  StripeTextUtils hasAnyPrefix number  PREFIXES AMERICAN EXPRESS         evaluatedType   AMERICAN EXPRESS    else if  StripeTextUtils hasAnyPrefix number  PREFIXES DISCOVER         evaluatedType   DISCOVER    else if  StripeTextUtils hasAnyPrefix number  PREFIXES JCB         evaluatedType   JCB    else if  StripeTextUtils hasAnyPrefix number  PREFIXES DINERS CLUB         evaluatedType   DINERS CLUB    else if  StripeTextUtils hasAnyPrefix number  PREFIXES VISA         evaluatedType   VISA    else if  StripeTextUtils hasAnyPrefix number  PREFIXES MASTERCARD         evaluatedType   MASTERCARD    else       evaluatedType   UNKNOWN        return evaluatedType         Finally  The Utility method           Check to see if the input number has any of the given prefixes           param number the number to test      param prefixes the prefixes to test against      return   code true  if number begins with any of the input prefixes     public static boolean hasAnyPrefix String number  String    prefixes      if  number    null           return false         for  String prefix   prefixes           if  number startsWith prefix            return true                 return false      Reference   Stripe Card Builder

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Here is a php class function returns CCtype by CCnumber   This code not validates the card or not runs  Luhn algorithm only try to find credit card type based on table in this page  basicly uses CCnumber length and CCcard prefix to determine CCcard type    lt  php class CreditcardType       public static  creditcardTypes                            Name    gt   American Express                cardLength    gt   15                cardPrefix    gt    34    37                              Name    gt   Maestro                cardLength    gt   12  13  14  15  16  17  18  19                cardPrefix    gt    5018    5020    5038    6304    6759    6761    6763                              Name    gt   Mastercard                cardLength    gt   16                cardPrefix    gt    51    52    53    54    55                              Name    gt   Visa                cardLength    gt   13  16                cardPrefix    gt    4                              Name    gt   JCB                cardLength    gt   16                cardPrefix    gt    3528    3529    353    354    355    356    357    358                              Name    gt   Discover                cardLength    gt   16                cardPrefix    gt    6011    622126    622127    622128    622129    62213   62214    62215    62216    62217    62218    62219   6222    6223    6224    6225    6226    6227    6228   62290    62291    622920    622921    622922    622923   622924    622925    644    645    646    647    648   649    65                              Name    gt   Solo                cardLength    gt   16  18  19                cardPrefix    gt    6334    6767                              Name    gt   Unionpay                cardLength    gt   16  17  18  19                cardPrefix    gt    622126    622127    622128    622129    62213    62214   62215    62216    62217    62218    62219    6222    6223   6224    6225    6226    6227    6228    62290    62291   622920    622921    622922    622923    622924    622925                              Name    gt   Diners Club                cardLength    gt   14                cardPrefix    gt    300    301    302    303    304    305    36                              Name    gt   Diners Club US                cardLength    gt   16                cardPrefix    gt    54    55                              Name    gt   Diners Club Carte Blanche                cardLength    gt   14                cardPrefix    gt    300    305                              Name    gt   Laser                cardLength    gt   16  17  18  19                cardPrefix    gt    6304    6706    6771    6709                           public static function getType  CCNumber                 CCNumber   trim  CCNumber            type    Unknown           foreach  CreditcardType   creditcardTypes as  card                if    in array strlen  CCNumber    card  cardLength                       continue                             prefixes           implode       card  cardPrefix                        if  preg match  prefixes   CCNumber     1                     type    card  Name                    break                                  return  type

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In javascript   function detectCardType number        var re             electron     4026 417500 4405 4508 4844 4913 4917  d             maestro     5018 5020 5038 5612 5893 6304 6759 6761 6762 6763 0604 6390  d             dankort     5019  d             interpayment     636  d             unionpay     62 88  d             visa    4 0-9  12     0-9  3               mastercard    5 1-5  0-9  14             amex    3 47  0-9  13             diners    3   0 0-5   68  0-9   0-9  11             discover    6   011 5 0-9  2   0-9  12             jcb       2131 1800 35 d 3   d 11               for var key in re            if re key  test number                 return key                     Unit test   describe  CreditCard   function         describe   detectCardType   function              var cards                  8800000000000000    UNIONPAY                 4026000000000000    ELECTRON                4175000000000000    ELECTRON                4405000000000000    ELECTRON                4508000000000000    ELECTRON                4844000000000000    ELECTRON                4913000000000000    ELECTRON                4917000000000000    ELECTRON                 5019000000000000    DANKORT                 5018000000000000    MAESTRO                5020000000000000    MAESTRO                5038000000000000    MAESTRO                5612000000000000    MAESTRO                5893000000000000    MAESTRO                6304000000000000    MAESTRO                6759000000000000    MAESTRO                6761000000000000    MAESTRO                6762000000000000    MAESTRO                6763000000000000    MAESTRO                0604000000000000    MAESTRO                6390000000000000    MAESTRO                 3528000000000000    JCB                3589000000000000    JCB                3529000000000000    JCB                 6360000000000000    INTERPAYMENT                 4916338506082832    VISA                4556015886206505    VISA                4539048040151731    VISA                4024007198964305    VISA                4716175187624512    VISA                 5280934283171080    MASTERCARD                5456060454627409    MASTERCARD                5331113404316994    MASTERCARD                5259474113320034    MASTERCARD                5442179619690834    MASTERCARD                 6011894492395579    DISCOVER                6011388644154687    DISCOVER                6011880085013612    DISCOVER                6011652795433988    DISCOVER                6011375973328347    DISCOVER                 345936346788903    AMEX                377669501013152    AMEX                373083634595479    AMEX                370710819865268    AMEX                371095063560404    AMEX                      Object keys cards  forEach function number                it  should detect card     number     as     cards number   function                     Basket detectCardType number  should equal cards number

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The credit debit card number is referred to as a PAN  or Primary Account Number   The first six digits of the PAN are taken from the IIN  or Issuer Identification Number  belonging to the issuing bank  IINs were previously known as BIN     Bank Identification Numbers     so you may see references to that terminology in some documents    These six digits are subject to an international standard  ISO IEC 7812  and can be used to determine the type of card from the number   Unfortunately the actual ISO IEC 7812 database is not publicly available  however  there are unofficial lists  both commercial and free  including on Wikipedia   Anyway  to detect the type from the number  you can use a regular expression like the ones below  Credit for original expressions  Visa   4 0-9  6    Visa card numbers start with a 4   MasterCard   5 1-5  0-9  5   222 1-9  0-9  3   22 3-9  0-9  4   2 3-6  0-9  5   27 01  0-9  4   2720 0-9  3    Before 2016  MasterCard numbers start with the numbers 51 through 55  but this will only detect MasterCard credit cards  there are other cards issued using the MasterCard system that do not fall into this IIN range   In 2016  they will add numbers in the range  222100-272099    American Express   3 47  0-9  5    American Express card numbers start with 34 or 37   Diners Club   3   0 0-5   68  0-9   0-9  4    Diners Club card numbers begin with 300 through 305  36 or 38  There are Diners Club cards that begin with 5 and have 16 digits  These are a joint venture between Diners Club and MasterCard and should be processed like a MasterCard   Discover   6   011 5 0-9  2   0-9  3    Discover card numbers begin with 6011 or 65   JCB      2131 1800 35 0-9  3   0-9  3    JCB cards begin with 2131  1800 or 35   Unfortunately  there are a number of card types processed with the MasterCard system that do not live in MasterCard   s IIN range  numbers starting 51   55   the most important case is that of Maestro cards  many of which have been issued from other banks    IIN ranges and so are located all over the number space   As a result  it may be best to assume that any card that is not of some other type you accept must be a MasterCard   Important  card numbers do vary in length  for instance  Visa has in the past issued cards with 13 digit PANs and cards with 16 digit PANs   Visa   s documentation currently indicates that it may issue or may have issued numbers with between 12 and 19 digits   Therefore  you should not check the length of the card number  other than to verify that it has at least 7 digits  for a complete IIN plus one check digit  which should match the value predicted by the Luhn algorithm    One further hint  before processing a cardholder PAN  strip any whitespace and punctuation characters from the input   Why   Because it   s typically much easier to enter the digits in groups  similar to how they   re displayed on the front of an actual credit card  i e   4444 4444 4444 4444   is much easier to enter correctly than  4444444444444444   There   s really no benefit in chastising the user because they   ve entered characters you don t expect here   This also implies making sure that your entry fields have room for at least 24 characters  otherwise users who enter spaces will run out of room   I   d recommend that you make the field wide enough to display 32 characters and allow up to 64  that gives plenty of headroom for expansion   Here s an image that gives a little more insight   UPDATE  2014   The checksum method no longer appears to be a valid way of verifying a card s authenticity as noted in the comments on this answer   UPDATE  2016   Mastercard is to implement new BIN ranges starting Ach Payment

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Try this for kotlin  Add Regex and add to the when statement   private fun getCardType number  String   String            val visa   Regex   4 0-9  12     0-9  3               val mastercard   Regex   5 1-5  0-9  14             val amx   Regex   3 47  0-9  13              return when               visa matches number  - gt   Visa              mastercard matches number  - gt   Mastercard              amx matches number  - gt   American Express              else - gt   Unknown

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Anatoliy s answer in PHP    public static function detectCardType  num          re   array           visa          gt     4 0-9  12     0-9  3                 mastercard    gt     5 1-5  0-9  14               amex          gt     3 47  0-9  13               discover      gt     6   011 5 0-9  2   0-9  12                  if  preg match  re  visa    num                 return  visa             else if  preg match  re  mastercard    num                 return  mastercard             else if  preg match  re  amex    num                 return  amex             else if  preg match  re  discover    num                 return  discover             else               return false

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Here s Complete C  or VB code for all kinds of CC related things on codeproject    IsValidNumber GetCardTypeFromNumber GetCardTestNumber PassesLuhnTest   This article has been up for a couple years with no negative comments

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Swift 5   extension String            func isMatch   Regex  String  - gt  Bool                    do               let regex   try NSRegularExpression pattern  Regex              let results   regex matches in  self  range  NSRange self startIndex     in  self               return results map                   String self Range  0 range  in  self                   count  gt  0           catch               return false                                   func getCreditCardType   - gt  String                     let VISA Regex    quot  4 0-9  6    quot          let MasterCard Regex    quot  5 1-5  0-9  5   222 1-9  0-9  3   22 3-9  0-9  4   2 3-6  0-9  5   27 01  0-9  4   2720 0-9  3    quot          let AmericanExpress Regex    quot  3 47  0-9  5    quot          let DinersClub Regex    quot  3   0 0-5   68  0-9   0-9  4    quot          let Discover Regex    quot  6   011 5 0-9  2   0-9  3    quot          let JCB Regex    quot     2131 1800 35 0-9  3   0-9  3    quot                   if self isMatch VISA Regex                return  quot VISA quot            else if self isMatch MasterCard Regex                return  quot MasterCard quot            else if self isMatch AmericanExpress Regex                return  quot AmericanExpress quot            else if self isMatch DinersClub Regex                return  quot DinersClub quot            else if self isMatch Discover Regex                return  quot Discover quot            else if self isMatch JCB Regex                return  quot JCB quot            else               return nil                                   Use    quot 1234123412341234 quot  getCreditCardType

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I searched around quite a bit for credit card formatting and phone number formatting   Found lots of good tips but nothing really suited my exact desires so I created this bit of code   You use it like this   var sf   smartForm formatCC myInputString   var cardType   sf cardType

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Stripe has provided this fantastic javascript library for card scheme detection  Let me add few code snippets and show you how to use it    Firstly Include it to your web page as   lt script type  text javascript  src  https   cdnjs cloudflare com ajax libs jquery payment 1 2 3 jquery payment js    gt  lt  script gt    Secondly use the function cardType for detecting the card scheme     document  ready function                               var type     payment cardType  4242 4242 4242 4242      test card number             console log type                                             Here are the reference links for more examples and demos    Stripe blog for jquery payment js Github repository

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Here is a php class function returns CCtype by CCnumber   This code not validates the card or not runs  Luhn algorithm only try to find credit card type based on table in this page  basicly uses CCnumber length and CCcard prefix to determine CCcard type    lt  php class CreditcardType       public static  creditcardTypes                            Name    gt   American Express                cardLength    gt   15                cardPrefix    gt    34    37                              Name    gt   Maestro                cardLength    gt   12  13  14  15  16  17  18  19                cardPrefix    gt    5018    5020    5038    6304    6759    6761    6763                              Name    gt   Mastercard                cardLength    gt   16                cardPrefix    gt    51    52    53    54    55                              Name    gt   Visa                cardLength    gt   13  16                cardPrefix    gt    4                              Name    gt   JCB                cardLength    gt   16                cardPrefix    gt    3528    3529    353    354    355    356    357    358                              Name    gt   Discover                cardLength    gt   16                cardPrefix    gt    6011    622126    622127    622128    622129    62213   62214    62215    62216    62217    62218    62219   6222    6223    6224    6225    6226    6227    6228   62290    62291    622920    622921    622922    622923   622924    622925    644    645    646    647    648   649    65                              Name    gt   Solo                cardLength    gt   16  18  19                cardPrefix    gt    6334    6767                              Name    gt   Unionpay                cardLength    gt   16  17  18  19                cardPrefix    gt    622126    622127    622128    622129    62213    62214   62215    62216    62217    62218    62219    6222    6223   6224    6225    6226    6227    6228    62290    62291   622920    622921    622922    622923    622924    622925                              Name    gt   Diners Club                cardLength    gt   14                cardPrefix    gt    300    301    302    303    304    305    36                              Name    gt   Diners Club US                cardLength    gt   16                cardPrefix    gt    54    55                              Name    gt   Diners Club Carte Blanche                cardLength    gt   14                cardPrefix    gt    300    305                              Name    gt   Laser                cardLength    gt   16  17  18  19                cardPrefix    gt    6304    6706    6771    6709                           public static function getType  CCNumber                 CCNumber   trim  CCNumber            type    Unknown           foreach  CreditcardType   creditcardTypes as  card                if    in array strlen  CCNumber    card  cardLength                       continue                             prefixes           implode       card  cardPrefix                        if  preg match  prefixes   CCNumber     1                     type    card  Name                    break                                  return  type

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Try this For swift   func checkCardValidation number   String  - gt  Bool       let reversedInts   number characters reversed   map   Int String  0             return reversedInts enumerated   reduce 0    sum  val  in             let odd   val offset   2    1             return sum    odd    val element     9   9    val element    2    9    val element                10    0     Use   if  self checkCardValidation number   yourNumber      true         print  Card Number valid    else       print  Card Number not valid

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Anatoliy s answer in PHP    public static function detectCardType  num          re   array           visa          gt     4 0-9  12     0-9  3                 mastercard    gt     5 1-5  0-9  14               amex          gt     3 47  0-9  13               discover      gt     6   011 5 0-9  2   0-9  12                  if  preg match  re  visa    num                 return  visa             else if  preg match  re  mastercard    num                 return  mastercard             else if  preg match  re  amex    num                 return  amex             else if  preg match  re  discover    num                 return  discover             else               return false

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In Card Range Recognition  CRR   a drawback with algorithms that use a series of regex or other hard-coded ranges  is that the BINs IINs do change over time in my experience   The co-branding of cards is an ongoing complication   Different Card Acquirers   merchants may need you treat the same card differently  depending on e g  geolocation     Additionally  in the last few years with e g  UnionPay cards in wider circulation  existing models do not cope with  new ranges that sometimes interleave with broader ranges that they supersede  Knowing the geography your system needs to cover may help  as some ranges are restricted to use in particular countries   For example  ranges 62 include some AAA sub-ranges in the US  but if your merchant base is outside the US  you may be able to treat all 62 as UnionPay  You may be also asked to treat a card differently based on merchant location   E g  to treat certain UK cards as debit domestically  but as credit internationally     There are very useful set of rules maintained by one major Acquiring Bank   E g  https   www barclaycard co uk business files BIN-Rules-EIRE pdf and https   www barclaycard co uk business files BIN-Rules-UK pdf    Valid links as of June 2017  thanks to the user who provided a link to updated reference   But be aware of the caveat that  while these CRR rules may represent the Card Issuing universe as it applies to the merchants acquired by that entity  it does not include e g  ranges identified as CUP UPI   These comments apply to magnetic stripe  MagStripe  or PKE  Pan Key Entry  scenarios  The situation is different again in the ICC EMV world   Update  Other answers on this page  and also the linked WikiPedia page  have JCB as always 16 long   However  in my company we have a dedicated team of engineers who certify our POS devices and software across multiple acquiring banks and geographies   The most recent Certification Pack of cards this team have from JCB  had a pass case for a 19 long PAN

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Swift 2 1 Version of Usman Y s answer  Use a print statement to verify so call by some string value  print self validateCardType self creditCardField text     func validateCardType testCard  String  - gt  String        let regVisa     4 0-9  12     0-9  3          let regMaster     5 1-5  0-9  14        let regExpress     3 47  0-9  13        let regDiners     3   0 0-5   68  0-9   0-9  11        let regDiscover     6   011 5 0-9  2   0-9  12        let regJCB        2131 1800 35  d 3    d 11          let regVisaTest   NSPredicate format   SELF MATCHES      regVisa      let regMasterTest   NSPredicate format   SELF MATCHES      regMaster      let regExpressTest   NSPredicate format   SELF MATCHES      regExpress      let regDinersTest   NSPredicate format   SELF MATCHES      regDiners      let regDiscoverTest   NSPredicate format   SELF MATCHES      regDiscover      let regJCBTest   NSPredicate format   SELF MATCHES      regJCB        if regVisaTest evaluateWithObject testCard           return  Visa            else if regMasterTest evaluateWithObject testCard           return  MasterCard             else if regExpressTest evaluateWithObject testCard           return  American Express             else if regDinersTest evaluateWithObject testCard           return  Diners Club             else if regDiscoverTest evaluateWithObject testCard           return  Discover             else if regJCBTest evaluateWithObject testCard           return  JCB             return

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Do not try to detect credit card type as part of processing a payment  You are risking of declining valid transactions   If you need to provide information to your payment processor  e g  PayPal credit card object requires to name the card type   then guess it from the least information available  e g    credit card  pan     preg replace     0-9          credit card  pan      inn    int  mb substr  credit card  pan    0  2        see http   en wikipedia org wiki List of Bank Identification Numbers Overview if   inn  gt   40  amp  amp   inn  lt   49         type    visa     else if   inn  gt   51  amp  amp   inn  lt   55         type    mastercard     else if   inn  gt   60  amp  amp   inn  lt   65         type    discover     else if   inn  gt   34  amp  amp   inn  lt   37         type    amex     else       throw new  UnexpectedValueException  Unsupported card type         This implementation  using only the first two digits  is enough to identify all of the major  and in PayPal s case all of the supported  card schemes  In fact  you might want to skip the exception altogether and default to the most popular card type  Let the payment gateway processor tell you if there is a validation error in response to your request   The reality is that your payment gateway does not care about the value you provide

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public string GetCreditCardType string CreditCardNumber        Regex regVisa   new Regex   4 0-9  12     0-9  3            Regex regMaster   new Regex   5 1-5  0-9  14          Regex regExpress   new Regex   3 47  0-9  13          Regex regDiners   new Regex   3   0 0-5   68  0-9   0-9  11          Regex regDiscover   new Regex   6   011 5 0-9  2   0-9  12          Regex regJCB   new Regex      2131 1800 35  d 3    d 11            if  regVisa IsMatch CreditCardNumber           return  VISA       else if  regMaster IsMatch CreditCardNumber           return  MASTER       else  if  regExpress IsMatch CreditCardNumber           return  AEXPRESS       else if  regDiners IsMatch CreditCardNumber           return  DINERS       else if  regDiscover IsMatch CreditCardNumber           return  DISCOVERS       else if  regJCB IsMatch CreditCardNumber           return  JCB       else         return  invalid       Here is the function to check Credit card type using Regex   c

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The first six digits of a card number  including the initial MII   digit  are known as the issuer identification number  IIN   These   identify the card issuing institution that issued the card to the card   holder  The rest of the number is allocated by the card issuer  The   card number s length is its number of digits  Many card issuers print   the entire IIN and account number on their card    Based on the above facts I would like to keep a snippet of JAVA code to identify card brand      Sample card types   public static final String AMERICAN EXPRESS    American Express   public static final String DISCOVER    Discover   public static final String JCB    JCB   public static final String DINERS CLUB    Diners Club   public static final String VISA    Visa   public static final String MASTERCARD    MasterCard   public static final String UNKNOWN    Unknown        Card Prefixes      Based on http   en wikipedia org wiki Bank card number Issuer identification number  28IIN 29 public static final String   PREFIXES AMERICAN EXPRESS     34    37    public static final String   PREFIXES DISCOVER     60    62    64    65    public static final String   PREFIXES JCB     35    public static final String   PREFIXES DINERS CLUB     300    301    302    303    304    305    309    36    38    39    public static final String   PREFIXES VISA     4    public static final String   PREFIXES MASTERCARD              2221    2222    2223    2224    2225    2226    2227    2228    2229            223    224    225    226    227    228    229            23    24    25    26            270    271    2720            50    51    52    53    54    55              Check to see if the input number has any of the given prefixes    public String getBrand String number     String evaluatedType  if  StripeTextUtils hasAnyPrefix number  PREFIXES AMERICAN EXPRESS         evaluatedType   AMERICAN EXPRESS    else if  StripeTextUtils hasAnyPrefix number  PREFIXES DISCOVER         evaluatedType   DISCOVER    else if  StripeTextUtils hasAnyPrefix number  PREFIXES JCB         evaluatedType   JCB    else if  StripeTextUtils hasAnyPrefix number  PREFIXES DINERS CLUB         evaluatedType   DINERS CLUB    else if  StripeTextUtils hasAnyPrefix number  PREFIXES VISA         evaluatedType   VISA    else if  StripeTextUtils hasAnyPrefix number  PREFIXES MASTERCARD         evaluatedType   MASTERCARD    else       evaluatedType   UNKNOWN        return evaluatedType         Finally  The Utility method           Check to see if the input number has any of the given prefixes           param number the number to test      param prefixes the prefixes to test against      return   code true  if number begins with any of the input prefixes     public static boolean hasAnyPrefix String number  String    prefixes      if  number    null           return false         for  String prefix   prefixes           if  number startsWith prefix            return true                 return false      Reference   Stripe Card Builder

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Check this out   http   www breakingpar com bkp home nsf 0 87256B280015193F87256CC70060A01B  function isValidCreditCard type  ccnum           Visa  length 16  prefix 4  dashes optional      Mastercard  length 16  prefix 51-55  dashes optional      Discover  length 16  prefix 6011  dashes optional      American Express  length 15  prefix 34 or 37      Diners  length 14  prefix 30  36  or 38          var re   new Regex            visa      4 d 3 -  d 4 -  d 4 -  d            mc      5 1-5  d 2 -  d 4 -  d 4 -  d 4               disc      6011-  d 4 -  d 4 -  d 4               amex      3 47  d 13               diners      3 068  d 12           type toLowerCase          if   re test ccnum   return false         Remove all dashes for the checksum checks to eliminate negative numbers     ccnum   ccnum split  -   join             Checksum   Mod 10          Add even digits in even length strings or odd digits in odd length strings      var checksum   0      for  var i    2 -  ccnum length   2    i  lt   ccnum length  i    2            checksum    parseInt ccnum charAt i - 1                 Analyze odd digits in even length strings or even digits in odd length strings      for  var i    ccnum length   2    1  i  lt  ccnum length  i    2            var digit   parseInt ccnum charAt i - 1     2          if  digit  lt  10    checksum    digit    else   checksum     digit - 9               if   checksum   10     0  return true      else return false

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Swift 5   extension String            func isMatch   Regex  String  - gt  Bool                    do               let regex   try NSRegularExpression pattern  Regex              let results   regex matches in  self  range  NSRange self startIndex     in  self               return results map                   String self Range  0 range  in  self                   count  gt  0           catch               return false                                   func getCreditCardType   - gt  String                     let VISA Regex    quot  4 0-9  6    quot          let MasterCard Regex    quot  5 1-5  0-9  5   222 1-9  0-9  3   22 3-9  0-9  4   2 3-6  0-9  5   27 01  0-9  4   2720 0-9  3    quot          let AmericanExpress Regex    quot  3 47  0-9  5    quot          let DinersClub Regex    quot  3   0 0-5   68  0-9   0-9  4    quot          let Discover Regex    quot  6   011 5 0-9  2   0-9  3    quot          let JCB Regex    quot     2131 1800 35 0-9  3   0-9  3    quot                   if self isMatch VISA Regex                return  quot VISA quot            else if self isMatch MasterCard Regex                return  quot MasterCard quot            else if self isMatch AmericanExpress Regex                return  quot AmericanExpress quot            else if self isMatch DinersClub Regex                return  quot DinersClub quot            else if self isMatch Discover Regex                return  quot Discover quot            else if self isMatch JCB Regex                return  quot JCB quot            else               return nil                                   Use    quot 1234123412341234 quot  getCreditCardType

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In javascript   function detectCardType number        var re             electron     4026 417500 4405 4508 4844 4913 4917  d             maestro     5018 5020 5038 5612 5893 6304 6759 6761 6762 6763 0604 6390  d             dankort     5019  d             interpayment     636  d             unionpay     62 88  d             visa    4 0-9  12     0-9  3               mastercard    5 1-5  0-9  14             amex    3 47  0-9  13             diners    3   0 0-5   68  0-9   0-9  11             discover    6   011 5 0-9  2   0-9  12             jcb       2131 1800 35 d 3   d 11               for var key in re            if re key  test number                 return key                     Unit test   describe  CreditCard   function         describe   detectCardType   function              var cards                  8800000000000000    UNIONPAY                 4026000000000000    ELECTRON                4175000000000000    ELECTRON                4405000000000000    ELECTRON                4508000000000000    ELECTRON                4844000000000000    ELECTRON                4913000000000000    ELECTRON                4917000000000000    ELECTRON                 5019000000000000    DANKORT                 5018000000000000    MAESTRO                5020000000000000    MAESTRO                5038000000000000    MAESTRO                5612000000000000    MAESTRO                5893000000000000    MAESTRO                6304000000000000    MAESTRO                6759000000000000    MAESTRO                6761000000000000    MAESTRO                6762000000000000    MAESTRO                6763000000000000    MAESTRO                0604000000000000    MAESTRO                6390000000000000    MAESTRO                 3528000000000000    JCB                3589000000000000    JCB                3529000000000000    JCB                 6360000000000000    INTERPAYMENT                 4916338506082832    VISA                4556015886206505    VISA                4539048040151731    VISA                4024007198964305    VISA                4716175187624512    VISA                 5280934283171080    MASTERCARD                5456060454627409    MASTERCARD                5331113404316994    MASTERCARD                5259474113320034    MASTERCARD                5442179619690834    MASTERCARD                 6011894492395579    DISCOVER                6011388644154687    DISCOVER                6011880085013612    DISCOVER                6011652795433988    DISCOVER                6011375973328347    DISCOVER                 345936346788903    AMEX                377669501013152    AMEX                373083634595479    AMEX                370710819865268    AMEX                371095063560404    AMEX                      Object keys cards  forEach function number                it  should detect card     number     as     cards number   function                     Basket detectCardType number  should equal cards number

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abobjects com  parvez ahmad ab bulk mailer use below script  function isValidCreditCard2 type  ccnum           if  type     Visa                  Visa  length 16  prefix 4  dashes optional            var re     4 d 3   d 4   d 4   d 4              else if  type     MasterCard                  Mastercard  length 16  prefix 51-55  dashes optional            var re     5 1-5  d 2   d 4   d 4   d 4              else if  type     Discover                  Discover  length 16  prefix 6011  dashes optional            var re     6011  d 4   d 4   d 4              else if  type     AmEx                  American Express  length 15  prefix 34 or 37            var re     3 4 7  d 13              else if  type     Diners                  Diners  length 14  prefix 30  36  or 38            var re     3 0 6 8  d 12                     if   re test ccnum   return false         return true                      Remove all dashes for the checksum checks to eliminate negative numbers        ccnum   ccnum split  -   join                Checksum   Mod 10             Add even digits in even length strings or odd digits in odd length strings         var checksum   0         for  var i  2- ccnum length   2    i lt  ccnum length  i  2              checksum    parseInt ccnum charAt i-1                       Analyze odd digits in even length strings or even digits in odd length strings         for  var i  ccnum length   2    1  i lt ccnum length  i  2              var digit   parseInt ccnum charAt i-1     2            if  digit  lt  10    checksum    digit    else   checksum     digit-9                     if   checksum   10     0  return true  else return false                   jQuery validator addMethod  isValidCreditCard   function postalcode  element         return isValidCreditCard2     cardType   val        cardNum   val            lt br gt credit card is invalid           Type lt  td gt                                             lt td class  text  gt  amp nbsp   lt form select path  cardType  cssclass  fields  style  border  1px solid  D5D5D5 padding  0px 0px 0px 0px width  130px height  22px   gt                                                 lt option value  SELECT  gt SELECT lt  option gt                                                 lt option value  MasterCard  gt Mastercard lt  option gt                                                 lt option value  Visa  gt Visa lt  option gt                                                  lt option value  AmEx  gt American Express lt  option gt                                                 lt option value  Discover  gt Discover lt  option gt                                               lt  form select gt   lt font color   FF0000  gt   lt  font gt        signupForm   validate        rules          companyName  required  true          address1  required  true          city  required  true          state  required  true          zip  required  true          country  required  true          chkAgree  required  true          confPassword  required  true          lastName  required  true          firstName  required  true          ccAddress1  required  true          ccZip                       postalcode   true                  phone  required  true          email              required  true             email  true                      userName              required  true             minlength  6                      password              required  true             minlength  6                                cardNum                          isValidCreditCard   true

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Updated  15th June 2016  as an ultimate solution currently   Please note that I even give vote up for the one is top voted  but to make it clear these are the regexps actually works i tested it with thousands of real BIN codes  The most important is to use start strings     otherwise it will give false results in real world   JCB     2131 1800 35  0-9  0    Start with  2131  1800  35  3528-3589   American Express  3 47  0-9  0    Start with  34  37  Diners Club  3   0 0-59  1   689   0-9  0    Start with  300-305  309  36  38-39  Visa  4 0-9  0    Start with  4  MasterCard   5 1-5  222 1-9  22 3-9  2 3-6  27 01  2720  0-9  0    Start with  2221-2720  51-55  Maestro   5 06789  6  0-9  0    Maestro always growing in the range  60-69  started with   not something else  but starting 5 must be encoded as mastercard anyway  Maestro cards must be detected in the end of the code because some others has in the range of 60-69  Please look at the code   Discover   6011 65 64 4-9  62212 6-9  6221 3-9  622 2-8  6229 01  62292 0-5   0-9  0    Discover quite difficult to code  start with  6011  622126-622925  644-649  65  In javascript I use this function  This is good when u assign it to an onkeyup event and it give result as soon as possible   function cc brand id cur val           the regular expressions check for possible matches as you type  hence the OR operators based on the number of chars        regexp string length  0  provided for soonest detection of beginning of the card numbers this way it could be used for BIN CODE detection also        JCB     jcb regex   new RegExp      2131 1800 35  0-9  0         2131  1800  35  3528-3589         American Express     amex regex   new RegExp   3 47  0-9  0         34  37        Diners Club     diners regex   new RegExp   3   0 0-59  1   689   0-9  0         300-305  309  36  38-39        Visa     visa regex   new RegExp   4 0-9  0         4        MasterCard     mastercard regex   new RegExp    5 1-5  222 1-9  22 3-9  2 3-6  27 01  2720  0-9  0         2221-2720  51-55     maestro regex   new RegExp    5 06789  6  0-9  0         always growing in the range  60-69  started with   not something else  but starting 5 must be encoded as mastercard anyway       Discover     discover regex   new RegExp    6011 65 64 4-9  62212 6-9  6221 3-9  622 2-8  6229 01  62292 0-5   0-9  0               6011  622126-622925  644-649  65          get rid of anything but numbers     cur val   cur val replace   D g               checks per each  as their could be multiple hits       fix  ordering matter in detection  otherwise can give false results in rare cases     var sel brand    unknown       if  cur val match jcb regex             sel brand    jcb         else if  cur val match amex regex             sel brand    amex         else if  cur val match diners regex             sel brand    diners club         else if  cur val match visa regex             sel brand    visa         else if  cur val match mastercard regex             sel brand    mastercard         else if  cur val match discover regex             sel brand    discover         else if  cur val match maestro regex             if  cur val 0      5       started 5 must be mastercard             sel brand    mastercard             else               sel brand    maestro     maestro is all 60-69 which is not something else  thats why this condition in the end                      return sel brand      Here you can play with it   http   jsfiddle net upN3L 69   For PHP use this function  this detects some sub VISA MC cards too           Obtain a brand constant from a PAN          param string  pan               Credit card number      param bool    include sub types Include detection of sub visa brands      return string      public static function getCardBrand  pan   include sub types   false          maximum length is not fixed now  there are growing number of CCs has more numbers in length  limiting can give false negatives atm        these regexps accept not whole cc numbers too       visa      visa regex      4 0-9  0            vpreca regex      428485 0-9  0            postepay regex       402360 402361 403035 417631 529948  0            cartasi regex       432917 432930 453998  0-9  0            entropay regex       406742 410162 431380 459061 533844 522093  0-9  0            o2money regex       422793 475743  0-9  0               MasterCard      mastercard regex       5 1-5  222 1-9  22 3-9  2 3-6  27 01  2720  0-9  0            maestro regex       5 06789  6  0-9  0            kukuruza regex      525477 0-9  0            yunacard regex      541275 0-9  0               American Express      amex regex      3 47  0-9  0               Diners Club      diners regex      3   0 0-59  1   689   0-9  0              Discover      discover regex       6011 65 64 4-9  62212 6-9  6221 3-9  622 2-8  6229 01  62292 0-5   0-9  0              JCB      jcb regex         2131 1800 35  0-9  0              ordering matter in detection  otherwise can give false results in rare cases     if  preg match  jcb regex   pan             return  jcb              if  preg match  amex regex   pan             return  amex              if  preg match  diners regex   pan             return  diners club                sub visa mastercard cards     if   include sub types            if  preg match  vpreca regex   pan                 return  v-preca                     if  preg match  postepay regex   pan                 return  postepay                     if  preg match  cartasi regex   pan                 return  cartasi                     if  preg match  entropay regex   pan                 return  entropay                     if  preg match  o2money regex   pan                 return  o2money                     if  preg match  kukuruza regex   pan                 return  kukuruza                     if  preg match  yunacard regex   pan                 return  yunacard                        if  preg match  visa regex   pan             return  visa              if  preg match  mastercard regex   pan             return  mastercard              if  preg match  discover regex   pan             return  discover              if  preg match  maestro regex   pan             if   pan 0      5       started 5 must be mastercard             return  mastercard                     return  maestro     maestro is all 60-69 which is not something else  thats why this condition in the end             return  unknown     unknown for this system

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A javascript improve of  Anatoliy answer  x000D   x000D  function getCardType  number      const numberFormated   number replace   D g        var patterns         VISA    4 0-9  12     0-9  3           MASTER    5 1-5  0-9  14         AMEX    3 47  0-9  13         ELO        636368   438935   504175   451416   636297   d 0 10     5067   4576   4011   d 0 12          AURA     5078 d 2    d 2    d 11          JCB       2131 1800 35 d 3   d 11         DINERS    3   0 0-5   68  0-9   0-9  11         DISCOVERY    6   011 5 0-9  2   0-9  12         HIPERCARD     606282 d 10   d 3      3841 d 15          ELECTRON     4026 417500 4405 4508 4844 4913 4917  d         MAESTRO     5018 5020 5038 5612 5893 6304 6759 6761 6762 6763 0604 6390  d         DANKORT     5019  d         INTERPAYMENT     636  d         UNIONPAY     62 88  d           for  var key in patterns        if  patterns key  test numberFormated           return key              console log getCardType  4539 5684 7526 2091    x000D   x000D   x000D

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In swift you can create an enum to detect the credit card type   enum CreditCardType  Int      Enum which encapsulates different card types and method to find the type of card   case Visa case Master case Amex case Discover  func validationRegex   - gt  String       var regex          switch self       case  Visa          regex     4 0-9  6          case  Master          regex     5 1-5  0-9  5          case  Amex          regex     3 47  0-9  13         case  Discover          regex     6   011 5 0-9  2   0-9  12               return regex    func validate cardNumber  String  - gt  Bool       let predicate   NSPredicate format   SELF MATCHES      validationRegex        return predicate evaluateWithObject cardNumber        Method returns the credit card type for given card number static func cardTypeForCreditCardNumber cardNumber  String  - gt  CreditCardType         var creditCardType  CreditCardType       var index   0     while let cardType   CreditCardType rawValue  index            if cardType validate cardNumber                creditCardType   cardType             break           else               index                       return creditCardType         Call the method CreditCardType cardTypeForCreditCardNumber   card number   which returns CreditCardType enum value

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Do not try to detect credit card type as part of processing a payment  You are risking of declining valid transactions   If you need to provide information to your payment processor  e g  PayPal credit card object requires to name the card type   then guess it from the least information available  e g    credit card  pan     preg replace     0-9          credit card  pan      inn    int  mb substr  credit card  pan    0  2        see http   en wikipedia org wiki List of Bank Identification Numbers Overview if   inn  gt   40  amp  amp   inn  lt   49         type    visa     else if   inn  gt   51  amp  amp   inn  lt   55         type    mastercard     else if   inn  gt   60  amp  amp   inn  lt   65         type    discover     else if   inn  gt   34  amp  amp   inn  lt   37         type    amex     else       throw new  UnexpectedValueException  Unsupported card type         This implementation  using only the first two digits  is enough to identify all of the major  and in PayPal s case all of the supported  card schemes  In fact  you might want to skip the exception altogether and default to the most popular card type  Let the payment gateway processor tell you if there is a validation error in response to your request   The reality is that your payment gateway does not care about the value you provide

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In swift you can create an enum to detect the credit card type   enum CreditCardType  Int      Enum which encapsulates different card types and method to find the type of card   case Visa case Master case Amex case Discover  func validationRegex   - gt  String       var regex          switch self       case  Visa          regex     4 0-9  6          case  Master          regex     5 1-5  0-9  5          case  Amex          regex     3 47  0-9  13         case  Discover          regex     6   011 5 0-9  2   0-9  12               return regex    func validate cardNumber  String  - gt  Bool       let predicate   NSPredicate format   SELF MATCHES      validationRegex        return predicate evaluateWithObject cardNumber        Method returns the credit card type for given card number static func cardTypeForCreditCardNumber cardNumber  String  - gt  CreditCardType         var creditCardType  CreditCardType       var index   0     while let cardType   CreditCardType rawValue  index            if cardType validate cardNumber                creditCardType   cardType             break           else               index                       return creditCardType         Call the method CreditCardType cardTypeForCreditCardNumber   card number   which returns CreditCardType enum value

[algorithm] How do you detect Credit card type based on number?

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