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Regular Expression Details

Title Test Find Pattern Title
Regular expression for validating a decimal IP address. Matches 4 groups of from 1 to 3 digits, where each group of digits ranges from 0 to 255 in value. Groups of digits must be separated by a single period (.) with no other formatting characters present. Uses conditional regex with lookahead syntax to prevent a match on a period following the final group of digits.
Matches | |
Non-Matches | 0127.3 |
Author Rating: Not yet rated. Jerry Schmersahl
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Existing User Comments

Title: Good one
Name: SJ
Date: 3/1/2009 11:14:25 PM
It's good, worked well for my basic test. Thanks!

Title: Buggy
Name: Jrf
Date: 9/21/2005 3:33:02 PM
I believe this regex to be buggy. It okays the following ip-address while it shouldn't (note the leading zeros):

Title: thx
Name: Chas
Date: 5/20/2005 2:42:49 AM
Thank u for ur Expression!!!! it works well!!

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