Regular Expressions 101

Validates IPv4 IP Address

validate an IP v4

This regexp was written for Regex Tuesday Challenge - Week Six.

Matches IPv4 address list separated by comma (,). Does not match an incomplete list (e.g. 192.168.1.0,)

Matches any valid IPv4 address with, optionally, a CIDR suffix. 0.0.0.0 to 255.255.255.255 and 1.1.1.1/0 to 1.1.1.1/32. Use the following regex if you don't want to allow the CIDR suffix. ...

This regex can be used to validate IPv4 and IPv6 addresses as well as CIDR ranges

(?(?:(?:250-5]|(?:2[0-4]|1\d|[1-9]|)\d)\.?\b){4}) Originating from ^((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4}$ at only 43 chars Source: [Danail Gabenski

socket io ipv6 and ipv4 to ipv4 convector

This will match valid IP addresses which are listed in RFC1918. 127.0.0.0 - 127.255.255.255 10.0.0.0 - 10.255.255.255 192.168.0.0 - 192.168.255.255 172.16.0.0 - 172.31.255.255

Validates IPv4 IP Address

Matches IP addresses

Match IPv4 address, optionally with /32 CIDR notation

Match IPv4 address, optionally with /32 CIDR notation