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# ip-regex
> Regular expression for matching IP addresses
## Install
```
$ npm install ip-regex
```
This module targets Node.js 8 or later and the latest version of Chrome, Firefox, and Safari. If you want support for older browsers, use version 2.1.0: `npm install ip-regex@2.1.0`
## Usage
```js
const ipRegex = require('ip-regex');
// Contains an IP address?
ipRegex().test('unicorn 192.168.0.1');
//=> true
// Is an IP address?
ipRegex({exact: true}).test('unicorn 192.168.0.1');
//=> false
ipRegex.v6({exact: true}).test('1:2:3:4:5:6:7:8');
//=> true
'unicorn 192.168.0.1 cake 1:2:3:4:5:6:7:8 rainbow'.match(ipRegex());
//=> ['192.168.0.1', '1:2:3:4:5:6:7:8']
// Contains an IP address?
ipRegex({includeBoundaries: true}).test('192.168.0.2000000000');
//=> false
// Matches an IP address?
'192.168.0.2000000000'.match(ipRegex({includeBoundaries: true}));
//=> null
```
## API
### ipRegex([options])
Returns a regex for matching both IPv4 and IPv6.
### ipRegex.v4([options])
Returns a regex for matching IPv4.
### ipRegex.v6([options])
Returns a regex for matching IPv6.
#### options
Type: `Object`
##### exact
Type: `boolean`<br>
Default: `false` *(Matches any IP address in a string)*
Only match an exact string. Useful with `RegExp#test()` to check if a string is an IP address.
##### includeBoundaries
Type: `boolean`<br>
Default: `false`
Include boundaries in the regex. When `true`, `192.168.0.2000000000` will report as an invalid IPv4 address. If this option is not set, the mentioned IPv4 address would report as valid (ignoring the trailing zeros).
## Related
- [is-ip](https://github.com/sindresorhus/is-ip) - Check if a string is an IP address
- [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
MIT © [Sindre Sorhus](https://sindresorhus.com)