isIP

Pure Javascript implementation for truly checking if the provided input is an IP address. Based on RFC 791 (IPv4), RFC 4291 (IPv6), and RFC 4632 (CIDR).

Install

NPM

$ npm install isipaddress

Node.js

var isIP = require('isipaddress');

isIP.test('127.0.0.1'); // returns true
isIP.test('FEDC:BA98:7654:3210:FEDC:BA98:7654:3210/16'); // returns true
isIP.test('Bananas in pajamas are coming down the stairs'); // returns false

isIP.v4('127.0.0.1'); // returns true
isIP.v4('127.0.0.1/18'); // returns true
isIP.v4('FEDC:BA98:7654:3210:FEDC:BA98:7654:3210'); // returns false

isIP.v6('127.0.0.1'); // returns false
isIP.v6('FEDC:BA98:7654:3210:FEDC:BA98:7654:3210'); // returns true
isIP.v6('FEDC:BA98:7654:3210:FEDC:BA98:7654:3210/32'); // returns true

Benchmarks

> Benchmarking ipv4.js

  Testing IP "192.168.2.1/24"

  isIP#test(ipv4) x 2,355,657 ops/sec ±0.25% (196 runs sampled)
  isIP#v4(ipv4)   x 8,430,772 ops/sec ±0.40% (194 runs sampled)

> Benchmarking ipv6.js

  Testing IP "FEDC:BA98:7654:3210:FEDC:BA98:7654:3210/32"

  isIP#test(ipv6) x 1,461,847 ops/sec ±0.22% (196 runs sampled)
  isIP#v6(ipv6)   x 1,488,787 ops/sec ±0.17% (196 runs sampled)

> Benchmarking ipvFuture.js

  Testing IP "v1.09azAZ-._~!$&'()*+,;=:"

  isIP#test(ipvFuture)   x  1,872,592 ops/sec ±0.29% (195 runs sampled)
  isIP#future(ipvFuture) x 10,964,118 ops/sec ±0.50% (191 runs sampled)

License

MIT