Write a regular expression to match a machine's MAC address

Question

Anonimo · Accepted Answer

The regex above is for an IP address, not a MAC address.

One possible regex for a MAC address is

([0-9a-fA-F][0-9a-fA-F]:){5}([0-9a-fA-F][0-9a-fA-F])

Ian G · Answer

And if you're allowed to use Perl regex, you could flag case-insensitivity:
/^([0-9A-F]{2}:){5}[0-9A-F]{2}$/i

Anonimo · Answer

\b(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]?)\b

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