Extract code country from phone number libphonenumber

Question

I have a string like this    33123456789  french phone number   I want to extract the country code   33  without knowing the country  For example  it should work if i have another phone from another country  I use the google library https   code google com p libphonenumber    If I know the country  it is cool I can find the country code    PhoneNumberUtil phoneUtil   PhoneNumberUtil getInstance    int countryCode   phoneUtil getCountryCodeForRegion locale getCountry       but I don t find a way to parse a string without to know the country

User · Answer

If the string containing the phone number will always start this way   33 or another country code  you should use regex to parse and get the country code and then use the library to get the country associated to the number

User · Answer

In here you can save the phone number as international formatted phone number   internationalFormatPhoneNumber   phoneUtil format givenPhoneNumber  PhoneNumberFormat INTERNATIONAL     it return the phone number as  International format     94 71 560 4888  so now I have get country code as this  String countryCode   internationalFormatPhoneNumber substring 0 internationalFormatPhoneNumber indexOf      replace           trim      Hope this will help you

User · Answer

Use a try catch block like below   try     const phoneNumber   this phoneUtil parseAndKeepRawInput value  this countryCode     catch e

User · Answer

I have got kept a handy helper method to take care of this based on one answer posted above   Imports    import com google i18n phonenumbers NumberParseException import com google i18n phonenumbers PhoneNumberUtil   Function       fun parseCountryCode  phoneNumberStr  String    String           val phoneUtil   PhoneNumberUtil getInstance           return try                  phone must begin with                 val numberProto   phoneUtil parse phoneNumberStr                  numberProto countryCode toString             catch  e  NumberParseException

User · Answer

Okay  so I ve joined the google group of libphonenumber   https   groups google com forum  hl en amp fromgroups  forum libphonenumber-discuss   and I ve asked a question   I don t need to set the country in parameter if my phone number begins with      Here is an example    PhoneNumberUtil phoneUtil   PhoneNumberUtil getInstance    try          phone must begin with         PhoneNumber numberProto   phoneUtil parse phone           int countryCode   numberProto getCountryCode      catch  NumberParseException e        System err println  NumberParseException was thrown      e toString

User · Answer

Here s a an answer how to find country calling code without using third-party libraries  as real developer does    Get list of all available country codes  Wikipedia can help here  https   en wikipedia org wiki List of country calling codes  Parse data in a tree structure where each digit is a branch   Traverse your tree digit by digit until you are at the last branch - that s your country code

User · Answer

Here is a solution to get the country based on an international phone number without using the Google library   Let me explain first why it is so difficult to figure out the country  The country code of few countries is 1 digit  2  3 or 4 digits  That would be simple enough  But the country code 1 is not just used for US  but also for Canada and some smaller places   1339 USA 1340 Virgin Islands  Caribbean Islands  1341 USA 1342 not used 1343 Canada  Digits 2  4 decide  if it is US or Canada or     There is no easy way to figure out the country  like the first xxx are Canada  the rest US   For my code  I defined a class which holds information for ever digit   public class DigitInfo     public char Digit    public Country  Country    public DigitInfo     Digits      A first array holds the DigitInfos for the first digit in the number  The second digit is used as an index into DigitInfo Digits  One travels down that Digits chain  until Digits is empty  If Country is defined  i e  not null  that value gets returned  otherwise any Country defined earlier gets returned   country code 1  byPhone 1  Country is US   country code 1236  byPhone 1  Digits 2  Digits 3  Digits 6  Country is Canada   country code 1235  byPhone 1  Digits 2  Digits 3  Digits 5  Country is null  Since                       byPhone 1  Country is US  also 1235 is US  because no other                       country was found in the later digits   Here is the method which returns the country based on the phone number        lt summary gt      Returns the Country based on an international dialing code       lt  summary gt  public static Country  GetCountry ReadOnlySpan lt char gt  phoneNumber      if  phoneNumber Length  0  return null     var isFirstDigit   true    DigitInfo  digitInfo   null    Country  country   null    foreach  var digitChar in phoneNumber        var digitIndex   digitChar -  0       if  isFirstDigit          isFirstDigit   false        digitInfo   ByPhone digitIndex         else         if  digitInfo  Digits is null  return country         digitInfo   digitInfo Digits digitIndex             if  digitInfo is null  return country       country   digitInfo Country  country        return country      The rest of the code  digitInfos for every country of the world  test code       is too big to be posted here  but it can be found on Github  https   github com PeterHuberSg WpfWindowsLib blob master WpfWindowsLib CountryCode cs  The code is part of a WPF TextBox and the library contains also other controls for email addresses  etc  A more detailed description is on CodeProject  International Phone Number Validation Explained in Detail

[android] Extract code country from phone number [libphonenumber]

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