IP Block Regex for Javascript

Question

Please can someone help me write a regex to validate an IP BLock eg. 196.126.0.1/29.

Thanks!

Please show us what you have tried with. – Jite May 15 '14 at 07:00 — Jite, May 15 '14 at 07:00
Do you want to validate if it is valid subnetting? – coder hacker May 15 '14 at 07:08 — coder hacker, May 15 '14 at 07:08

score 0 · Answer 1 · answered May 15 '14 at 07:33

If you want to check that the IP is correct you can use the following expression :

 ^(\d{1,3}\.){3}\d{1,3}\/\d{1,2}$

\d{1,3}\. check that you have one to three digit following with a dot.

(\d{1,3}\.){3} repeteat the test three time.

\d{1,3}\/\d{1,2} last IP digits following with a slash and a port number (change the max number of digit if the port may be more than two digit).

1 Answers1