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File / Folder	Size	Action
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index.d.ts	0.87KB	edt ren
index.js	23.848KB	edt ren
license	1.083KB	edt ren
package.json	0.719KB	edt ren
readme.md	1.156KB	edt ren

# is-ip [![Build Status](https://travis-ci.org/sindresorhus/is-ip.svg?branch=master)](https://travis-ci.org/sindresorhus/is-ip)

> Check if a string is an IP address

## Install

```
$ npm install 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(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.

```js
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](https://github.com/sindresorhus/ip-regex) - Regular expression for matching IP addresses
- [is-cidr](https://github.com/silverwind/is-cidr) - Check if a string is an IP address in CIDR notation
- [cidr-regex](https://github.com/silverwind/cidr-regex) - Regular expression for matching IP addresses in CIDR notation

## License

<=Back