How to build a regex for an IP Addres Range?

[Jesus Nava]

Hello experts please I need your help, how can a regex to accept an IP range be built? for example:

34.3.4.4 - 34.3.4.5

I have this regex from 

https://community.servicenow.com/community?id=community_question&sys_id=0cf3a62ddbb8a010fa192183ca96198e

^(?=.*?[1-9])[0-9()-]+$

but it is not working as I need it, I need that the user can add and IP address with the character - so as to add a range, how can that be done?

Thank you

[Yousaf]

Hi,

Try this please.

^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$

Example

Accept:

127.0.0.1
192.168.1.1
192.168.1.255
255.255.255.255
0.0.0.0
1.1.1.01

Reject:

30.168.1.255.1
127.1
192.168.1.256
-1.2.3.4
1.1.1.1.
3...3

Mark Correct or Helpful if it helps.

[Jesus Nava]

Hello Yousaf, I still get an error

here is what I added in the Regex

am I doing something wrong?

Thank you!

[Yousaf]

Oo Yes that was for IP address not Ip range.

Glad you found the answer.

[Jesus Nava]

Thank you Yousaf for your help!!