> For the complete documentation index, see [llms.txt](https://docs.medable.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.medable.com/cortex-api/scripting/modules-1/util.ip-module.md).

# Util.ip Module

\
 Import

```
import { ip } from 'util';
```

### Methods

[is\_ipv4(ip)](https://docs.medable.com/reference#section-is_ipv4-ip-)\
[is\_cidr(cidr)](https://docs.medable.com/reference#section-is_cidr-cidr-)\
[contains\_ip(array, ip)](https://docs.medable.com/reference#section-contains_ip-array-ip-)\
[ip4toint(ip)](https://docs.medable.com/reference#section-ip4toint-ip-)\
[inttoip4(int)](https://docs.medable.com/reference#section-inttoip4-int-)\
[ip4incidr(ip, cidr)](https://docs.medable.com/reference#section-ip4incidr-ip-cidr-)

### is\_ipv4(ip)

Returns true if the argument is a valid IPv4 address.

**Arguments**

* `ip` (String)

**Returns**

Boolean

### is\_cidr(cidr)

Returns true if the argument is a valid IPv4 address range.

**Arguments**

* `cidr` (String)

**Returns**

Boolean

### contains\_ip(array, ip)

Returns true if the `ip` argument is a valid IPv4 address and contained `array`.

**Arguments**

* `array` (String\[]) An array of ip addresses or cidr ranges against which to match `ip`
* `ip` (String)

**Returns**

Boolean

### ip4toint(ip)

Converts an IPv4 string to an integer.

**Arguments**

* `ip` (String)

**Returns**

Number

### inttoip4(int)

Converts an integer to an IPv4 string.

**Arguments**

* `int` (Number)

**Returns**

String

### ip4incidr(ip, cidr)

Returns true if `ip` is contained in the `cidr` range.

**Arguments**

* `ip` (String)
* `cidr` (String)

**Returns**

Boolean