Build an IP address validation regex

Check whether text is a dotted-quad IPv4 address.

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ToolIP Address Regex

Input

Output

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How it works

The pattern checks four dot-separated decimal octets with bounded values and anchors the complete input. It targets IPv4 text, not IPv6 or CIDR.

IPv4 address validation pattern

Get the regex pattern for validating IPv4 addresses

Input

											ipv4

Output

												IP Regex (ipv4):

^(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?)$

IPv4 address (e.g., 192.168.1.1)

Firewall forms, log filters, and allowlist editors check IPv4 text.