What is the regex pattern for mac address?

The regex pattern for mac address is: ^([0-9a-fA-F]{2}[:-]){5}[0-9a-fA-F]{2}$.

How does the mac address regex work?

^: Start of string. ([0-9a-fA-F]{2}[:-]): Two hex digits followed by colon or hyphen. {5}: Repeat 5 times (first 5 octets). [0-9a-fA-F]{2}: Final two hex digits. $: End of string.

Regex for MAC Address

Matches MAC addresses in common formats using colons or hyphens as separators (e.g., 00:1A:2B:3C:4D:5E).

Pattern

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

Pattern Breakdown

Token	Explanation
^	Start of string
([0-9a-fA-F]{2}[:-])	Two hex digits followed by colon or hyphen
{5}	Repeat 5 times (first 5 octets)
[0-9a-fA-F]{2}	Final two hex digits
$	End of string

Test Examples

Input	Match?
00:1A:2B:3C:4D:5E	Match
00-1A-2B-3C-4D-5E	Match
001A2B3C4D5E	No match
GG:1A:2B:3C:4D:5E	No match

Common Use Cases

Network device identification
DHCP configuration
Network monitoring

Variations

^[0-9a-fA-F]{12}$

12 hex digits without separators

Other Regex Patterns

Email Address US Phone Number International Phone Number URL IPv4 Address IPv6 Address Date (MM/DD/YYYY)Date (ISO 8601 YYYY-MM-DD)Time (HH:MM, 24-hour)Credit Card Number US Social Security Number US ZIP Code

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