# ip-ptr
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> Get the PTR name for a given IPv4 or IPv6 address

## Installation
```console
$ npm i ip-ptr
```
## Example
```js
import ipPtr from "ip-ptr";

ipPtr("1.2.3.4");
//=> 4.3.2.1.in-addr.arpa
ipPtr("2001:db8::1");
//=> 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa
```

## API
### ipPtr(ip)
- `ip` *string* - A IPv4 or IPv6 address.

Will throw if `ip` is not a valid IP address.

© [silverwind](https://github.com/silverwind), distributed under BSD licence