Regular Expressions 101

Explanation

Pro

\ban ASCII word boundary

Character Class[[:xdigit:]]{2}

{2}matches exactly 2 characters from the set below:

[:xdigit:]a hexadecimal digit [A-Fa-f0-9]

Non-Capturing Group(?:[^[:xdigit:]]?[[:xdigit:]]{2}){5}

{5}repeats the group contents below exactly 5 times:

Negated Character Class[^[:xdigit:]]?

?matches at most one character outside the set below:

[:xdigit:]a hexadecimal digit [A-Fa-f0-9]

Character Class[[:xdigit:]]{2}

{2}matches exactly 2 characters from the set below:

[:xdigit:]a hexadecimal digit [A-Fa-f0-9]

\ban ASCII word boundary

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

\b[[:xdigit:]]{2}(?:[^[:xdigit:]]?[[:xdigit:]]{2}){5}\b

New

This regular expression matches whatever looks like a MAC addresses.

01:b7:78:Fe:4D:B8
01b7.78Fe.4DB8
01b778-Fe4DB8
01b778Fe4DB8
01#b778Fe;4D!B8