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]

Sure No problem

[_ChrisHelming]

This is the best answer. To have a range just duplicate it and add a dash.

^(?:(?: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]?)\s?-\s?(?:(?: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]?)$

An even better method would be to have two variables: one for IP range start and one for IP range end.

[Yousaf]

Thanks Yes I duplicated it and it was working.

[Muhammad Khan · Accepted solution]

Hi Jesus,

Try this in variable validation regex

^[0-9]+.[0-9]+.[0-9]+.[0-9]+ \- [0-9]+.[0-9]+.[0-9]+.[0-9]+$

[Muhammad Khan]

What is the type of your variable, is it IP Address or Single Line Text ?