Regular Expressions 101

Community Patterns

1...45678...745

ClassB private IP address range

0

Regular Expression
ECMAScript (JavaScript)

/
(?:(?:^172\.1[6-9])|(?:^172\.2[0-9])|(?:^172\.3[0-1]))(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){2}$
/