Subnet

1.0.11

Public/Get-NetworkClass.ps1

Function Get-NetworkClass {
    <#
        .SYNOPSIS
            Use to determine the network class of a given IP address.

        .DESCRIPTION
            Returns A, B, C, D or E depending on the numeric value of the first octet of a given IP address.

        .PARAMETER IP
            The IP address to test.

        .EXAMPLE
            Get-NetworkClass -IP 172.16.1.2
    #>
    param(
        [string]$IP
    )

    Switch ($IP.Split('.')[0]) {
        { $_ -in 0..127 } { 'A' }
        { $_ -in 128..191 } { 'B' }
        { $_ -in 192..223 } { 'C' }
        { $_ -in 224..239 } { 'D' }
        { $_ -in 240..255 } { 'E' }
    }
}