What is the regex pattern for ipv6 address?

The regex pattern for ipv6 address is: ^(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$.

How does the ipv6 address regex work?

^: Start of string. (?:[0-9a-fA-F]{1,4}:): 1-4 hex digits followed by colon. {7}: Repeat 7 times (first 7 groups). [0-9a-fA-F]{1,4}: Final group of 1-4 hex digits. $: End of string.

Regex for IPv6 Address

Matches full IPv6 addresses in standard notation (8 groups of 4 hex digits separated by colons).

Pattern

/^(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$/

Pattern Breakdown

Token	Explanation
^	Start of string
(?:[0-9a-fA-F]{1,4}:)	1-4 hex digits followed by colon
{7}	Repeat 7 times (first 7 groups)
[0-9a-fA-F]{1,4}	Final group of 1-4 hex digits
$	End of string

Test Examples

Input	Match?
2001:0db8:85a3:0000:0000:8a2e:0370:7334	Match
fe80:0000:0000:0000:0000:0000:0000:0001	Match
::1	No match
192.168.1.1	No match

Common Use Cases

IPv6 address validation
Network configuration
DNS record validation

Variations

^([0-9a-fA-F]{0,4}:){2,7}[0-9a-fA-F]{0,4}$

Allows compressed notation with ::

Other Regex Patterns

Email Address US Phone Number International Phone Number URL IPv4 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 Hex Color Code

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