List of IP addresses hostnames from local network in Python

Question

How can I get a list of the IP addresses or host names from a local network easily in Python   It would be best if it was multi-platform  but it needs to work on Mac OS X first  then others follow   Edit  By local I mean all active addresses within a local network  such as 192 168 xxx xxx   So  if the IP address of my computer  within the local network  is 192 168 1 1  and I have three other connected computers  I would want it to return the IP addresses 192 168 1 2  192 168 1 3  192 168 1 4  and possibly their hostnames

User · Answer

Here is a small tool scanip that will help you to get all ip addresses and their corresponding mac addresses in the network  Works on Linux    https   github com vivkv scanip

User · Answer

One of the answers in this question might help you  There seems to be a platform agnostic version for python  but I haven t tried it yet

User · Answer

If you know the names of your computers you can use   import socket IP1   socket gethostbyname socket gethostname      local IP adress of your computer IP2   socket gethostbyname  name of your computer     IP adress of remote computer   Otherwise you will have to scan for all the IP addresses that follow the same mask as your local computer  IP1   as stated in another answer

User · Answer

I found this network scanner in python article and wrote this short code  It does what you want  You do however need to know accessible ports for your devices  Port 22 is ssh standard and what I am using  I suppose you could loop over all ports  Some defaults are   linux   20  21  22  23  25  80  111  443  445  631  993  995  windows   135  137  138  139  445  mac   22  445  548  631    import socket  def connect hostname  port       sock   socket socket socket AF INET  socket SOCK STREAM      socket setdefaulttimeout 1      result   sock connect ex  hostname  port       sock close       return result    0  for i in range 0 255       res   connect  192 168 1   str i   22      if res          print  Device found at      192 168 1   str i        str 22

User · Answer

For OSX  and Linux   a simple solution is to use either os popen or os system and run the arp -a command   For example   devices      for device in os popen  arp -a    devices append device    This will give you a list of the devices on your local network

User · Answer

Try   import socket  print   ip for ip in socket gethostbyname ex socket gethostname    2  if not ip startswith  127      1

User · Answer

One of the answers in this question might help you  There seems to be a platform agnostic version for python  but I haven t tried it yet

User · Answer

If you know the names of your computers you can use   import socket IP1   socket gethostbyname socket gethostname      local IP adress of your computer IP2   socket gethostbyname  name of your computer     IP adress of remote computer   Otherwise you will have to scan for all the IP addresses that follow the same mask as your local computer  IP1   as stated in another answer

User · Answer

I have done following code to get the IP of MAC known device  This can be modified accordingly to obtain all IPs with some string manipulation  Hope this will help you    running windows cmd line  statement and put output into a string cmd out   os popen  arp -a   read   line arr   cmd out split   n   line count   len line arr     search in all lines for ip for i in range 0  line count       y   line arr i      z   y find mac address        if mac address is found then get the ip using regex matching     if z  gt  0          ip out  re search   0-9     0-9     0-9     0-9     y  re M   re I

User · Answer

One of the answers in this question might help you  There seems to be a platform agnostic version for python  but I haven t tried it yet

User · Answer

I have collected the following functionality from some other threads and it works for me in Ubuntu   import os import socket     import multiprocessing import subprocess import os   def pinger job q  results q               Do Ping      param job q       param results q       return              DEVNULL   open os devnull   w       while True           ip   job q get            if ip is None              break          try              subprocess check call   ping    -c1   ip                                     stdout DEVNULL              results q put ip          except              pass   def get my ip                Find my IP address      return              s   socket socket socket AF INET  socket SOCK DGRAM      s connect   8 8 8 8   80       ip   s getsockname   0      s close       return ip   def map network pool size 255               Maps the network      param pool size  amount of parallel ping processes      return  list of valid ip addresses              ip list   list          get my IP and compose a base like 192 168 1 xxx     ip parts   get my ip   split          base ip   ip parts 0          ip parts 1          ip parts 2               prepare the jobs queue     jobs   multiprocessing Queue       results   multiprocessing Queue        pool    multiprocessing Process target pinger  args  jobs  results   for i in range pool size        for p in pool          p start          cue hte ping processes     for i in range 1  255           jobs put base ip     0   format i        for p in pool          jobs put None       for p in pool          p join          collect he results     while not results empty            ip   results get           ip list append ip       return ip list   if   name         main          print  Mapping          lst   map network       print lst

User · Answer

Here is a small tool scanip that will help you to get all ip addresses and their corresponding mac addresses in the network  Works on Linux    https   github com vivkv scanip

User · Answer

I have done following code to get the IP of MAC known device  This can be modified accordingly to obtain all IPs with some string manipulation  Hope this will help you    running windows cmd line  statement and put output into a string cmd out   os popen  arp -a   read   line arr   cmd out split   n   line count   len line arr     search in all lines for ip for i in range 0  line count       y   line arr i      z   y find mac address        if mac address is found then get the ip using regex matching     if z  gt  0          ip out  re search   0-9     0-9     0-9     0-9     y  re M   re I

User · Answer

Update  The script is now located on github   I wrote a small python script  that leverages scapy s arping

User · Answer

If by  local  you mean on the same network segment  then you have to perform the following steps    Determine your own IP address Determine your own netmask Determine the network range Scan all the addresses  except the lowest  which is your network address and the highest  which is your broadcast address   Use your DNS s reverse lookup to determine the hostname for IP addresses which respond to your scan    Or you can just let Python execute nmap externally and pipe the results back into your program

User · Answer

If by  local  you mean on the same network segment  then you have to perform the following steps    Determine your own IP address Determine your own netmask Determine the network range Scan all the addresses  except the lowest  which is your network address and the highest  which is your broadcast address   Use your DNS s reverse lookup to determine the hostname for IP addresses which respond to your scan    Or you can just let Python execute nmap externally and pipe the results back into your program

User · Answer

If you know the names of your computers you can use   import socket IP1   socket gethostbyname socket gethostname      local IP adress of your computer IP2   socket gethostbyname  name of your computer     IP adress of remote computer   Otherwise you will have to scan for all the IP addresses that follow the same mask as your local computer  IP1   as stated in another answer

User · Answer

If by  local  you mean on the same network segment  then you have to perform the following steps    Determine your own IP address Determine your own netmask Determine the network range Scan all the addresses  except the lowest  which is your network address and the highest  which is your broadcast address   Use your DNS s reverse lookup to determine the hostname for IP addresses which respond to your scan    Or you can just let Python execute nmap externally and pipe the results back into your program

User · Answer

Try   import socket  print   ip for ip in socket gethostbyname ex socket gethostname    2  if not ip startswith  127      1

User · Answer

I found this network scanner in python article and wrote this short code  It does what you want  You do however need to know accessible ports for your devices  Port 22 is ssh standard and what I am using  I suppose you could loop over all ports  Some defaults are   linux   20  21  22  23  25  80  111  443  445  631  993  995  windows   135  137  138  139  445  mac   22  445  548  631    import socket  def connect hostname  port       sock   socket socket socket AF INET  socket SOCK STREAM      socket setdefaulttimeout 1      result   sock connect ex  hostname  port       sock close       return result    0  for i in range 0 255       res   connect  192 168 1   str i   22      if res          print  Device found at      192 168 1   str i        str 22

User · Answer

For OSX  and Linux   a simple solution is to use either os popen or os system and run the arp -a command   For example   devices      for device in os popen  arp -a    devices append device    This will give you a list of the devices on your local network

User · Answer

I have collected the following functionality from some other threads and it works for me in Ubuntu   import os import socket     import multiprocessing import subprocess import os   def pinger job q  results q               Do Ping      param job q       param results q       return              DEVNULL   open os devnull   w       while True           ip   job q get            if ip is None              break          try              subprocess check call   ping    -c1   ip                                     stdout DEVNULL              results q put ip          except              pass   def get my ip                Find my IP address      return              s   socket socket socket AF INET  socket SOCK DGRAM      s connect   8 8 8 8   80       ip   s getsockname   0      s close       return ip   def map network pool size 255               Maps the network      param pool size  amount of parallel ping processes      return  list of valid ip addresses              ip list   list          get my IP and compose a base like 192 168 1 xxx     ip parts   get my ip   split          base ip   ip parts 0          ip parts 1          ip parts 2               prepare the jobs queue     jobs   multiprocessing Queue       results   multiprocessing Queue        pool    multiprocessing Process target pinger  args  jobs  results   for i in range pool size        for p in pool          p start          cue hte ping processes     for i in range 1  255           jobs put base ip     0   format i        for p in pool          jobs put None       for p in pool          p join          collect he results     while not results empty            ip   results get           ip list append ip       return ip list   if   name         main          print  Mapping          lst   map network       print lst

User · Answer

If by  local  you mean on the same network segment  then you have to perform the following steps    Determine your own IP address Determine your own netmask Determine the network range Scan all the addresses  except the lowest  which is your network address and the highest  which is your broadcast address   Use your DNS s reverse lookup to determine the hostname for IP addresses which respond to your scan    Or you can just let Python execute nmap externally and pipe the results back into your program

User · Answer

One of the answers in this question might help you  There seems to be a platform agnostic version for python  but I haven t tried it yet

User · Answer

Update  The script is now located on github   I wrote a small python script  that leverages scapy s arping

User · Answer

If you know the names of your computers you can use   import socket IP1   socket gethostbyname socket gethostname      local IP adress of your computer IP2   socket gethostbyname  name of your computer     IP adress of remote computer   Otherwise you will have to scan for all the IP addresses that follow the same mask as your local computer  IP1   as stated in another answer

[python] List of IP addresses/hostnames from local network in Python

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