ipPrefix - Generate the CIDR range for a given subnet

The ipPrefix function is very useful for working out the subnet in which an IP address belongs.

Syntax

ipPrefix(ip: string, subnetSize: number): string

Name	Type	Required	Description
ip	string	true	The IP address to process
subnetSize	number	true	The number of mask bits in the subnet. For example, `10` will result in a CIDR range ending in `/10`

Consider the following document:

{
    "ip": "155.123.7.4"
}

To calculate the subnet for this IP, and assuming that we know the number of mask bits, we can use the ipPrefix function:

create ip_subnet from ipPrefix(ip, 10)

This results in the following document:

{
    "ip": "155.123.7.4",
    "ip_subnet": "155.64.0.0/10"
}

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