How can I use regex to validate an IP address?

How can I use regex to validate an IP address?

You can use the regex pattern ^(\d{1,3}\.){3}\d{1,3}$ to match a basic IP address format.

Does this regex check for valid IP ranges?

No, it only checks the format. To validate ranges, you need a more complex regex.

Can you provide a regex that checks for valid IP ranges?

Sure! A more comprehensive regex for validating IP addresses is ^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$.

What about IPv6 addresses?

For IPv6, you can use the regex ^([0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$ to validate the format.