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# is-ip [](https://travis-ci.org/sindresorhus/is-ip) > Check if a string is an IP address ## Install ``` $ npm install --save is-ip ``` ## Usage ```js 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(input) Check if `input` is IPv4 or IPv6. ### isIp.v4(input) Check if `input` is IPv4. ### isIp.v6(input) Check if `input` is IPv6. ## Related - [ip-regex](https://github.com/sindresorhus/ip-regex) - Regular expression for matching IP addresses ## License MIT © [Sindre Sorhus](https://sindresorhus.com)