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Asked: 2026-05-23T14:27:43+00:00

I would like to know the correct regex for matching multiple MAC addresses separated

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I would like to know the correct regex for matching multiple MAC addresses separated my any delimiter, such as a comma.

The regex for a single MAC address would be: ^([0-9a-fA-F]{2}[:-]){5}[0-9a-fA-F]{2}$.

So for multiple MAC addresses delimited by comma, i figured ^(([0-9a-fA-F]{2}[:-]){5}[0-9a-fA-F]{2},?)){+}$ would do the trick.

Where am i going wrong? Any help would be appreciated, thanks.

Edit: Some people have asked about what went wrong. Well, simply put, the regex does not work. Let us say i enter a single (valid) MAC address, it is flagged as an invalid MAC address. Same goes for multiple MAC addresses delimited by comma.

The regex is needed for a validator for a textbox on an ASP .NET page. If more details are needed, let me know.

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1 Answer

  1. Editorial Team

    ^([0-9a-fA-F]{2}[:-]){5}[0-9a-fA-F]{2}(,([0-9a-fA-F]{2}[:-]){5}[0-9a-fA-F]{2})*$

    See Regex for Comma delimited list for details about making a regex to match a delimited list. Basically you need to put the regex for a MAC address followed by a group containing a comma and the regex for a MAC address that is matched zero or more times. In your attempted solution the comma is completely optional.

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