How to Check IP in IP Range

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Hi friends,

i have two questions

i have IP Range like "10.20.30.0/24" and search ip "10.20.30.12"

1. i need to find start IP and End IP of the Range
2. Check weather Ip inside range.

I need to implement for IPV4 and IPV6.

any help,??

Thanks
Joe

Posted 15-Feb-13 2:18am

Joe Rozario

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Espen Harlinn · Answer 1 · 2013-02-15T02:31:00

Use the IPAddress Class[^]

IPAddress.Parse( "fe80::21c:42ff:fe00:8%vnic0" );
IPAddress.Parse( "127.0.0.1" );

// AddressFamily.InterNetworkV6 indicates an ipv6 address
if( IPAddress.Parse("127.0.0.1").AddressFamily == AddressFamily.InterNetwork ) 
{
  //You've get an ipv4 address
}

The IPAddress.Address Property[^] is a long property, a 64 bit integer - so comparing whether an address is in a range is as easy as comparing integer values.

Best regards
Espen Harlinn

Bert Goens · Answer 2 · 2013-02-15T02:28:00

Solution 1

You could read this article:
http://www.dreamincode.net/forums/topic/24549-vbnet-find-all-ips-on-a-lan/[^]
PsychoCoder has a nice solution

Posted 15-Feb-13 2:28am

Bert Goens