is-ip

Check if a string is an IP address

If you only need this for Node.js and don't care about browser support, you may want to use net.isIP instead. Note that it returns an integer instead of a boolean.

Install

$ npm install is-ip

Usage

const isIp = require('is-ip');

isIp('192.168.0.1');
//=> true

isIp('1:2:3:4:5:6:7:8');
//=> true

isIp.v4('1:2:3:4:5:6:7:8');
//=> false

API

isIp(string)

Check if string is IPv4 or IPv6.

isIp.v4(string)

Check if string is IPv4.

isIp.v6(string)

Check if string is IPv6.

isIp.version(string)

Returns 6 if string is IPv6, 4 if string is IPv4, or undefined if string is neither.

isIp.version('192.168.0.1');
//=> 4

isIp.version('1:2:3:4:5:6:7:8');
//=> 6

isIp.version('abc');
//=> undefined

Related

• ip-regex - Regular expression for matching IP addresses
• is-cidr - Check if a string is an IP address in CIDR notation
• cidr-regex - Regular expression for matching IP addresses in CIDR notation

License

MIT © Sindre Sorhus