IP address regex python

Question

I am having an issue with Regular expression, I need the most efficient regex that match IP address and in range of 255 only.

I tried this one "ip_pattern = '\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}'" , but it does match even numbers over 255, such as 321.222.11.4

spa900 · Accepted Answer · 2016-11-02 00:21:27Z

5

This should do it:

^(?:(?: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]?)$

answered Nov 2, 2016 at 0:21

spa900

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ibr2 Over a year ago

should it be like this "^(?:(?: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]?)$ " or how ??

Senthil · Accepted Answer · 2018-11-09 08:19:41Z

1

Use this Regex. It will match and check the IP range within 255.

\b(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]?[0-9]).(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]?[0-9]).(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]?[0-9]).(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]?[0-9])\b

answered Nov 9, 2018 at 8:19

Senthil

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