Regular expression to match DNS hostname or IP Address?

Question

Does anyone have a regular expression handy that will match any legal DNS hostname or IP address?

It\'s easy to write one that works 95% of the time, but I\'m hoping

Answer 1

I found this works pretty well for IP addresses. It validates like the top answer but it also makes sure the ip is isolated so no text or more numbers/decimals are after or before the ip.

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