Subnet

1.0.11

Public/Test-PrivateIP.ps1

Function Test-PrivateIP {
    <#
        .SYNOPSIS
            Use to determine if a given IP address is within the IPv4 private address space ranges.

        .DESCRIPTION
            Returns $true or $false for a given IP address string depending on whether or not is is within the private IP address ranges.

        .PARAMETER IP
            The IP address to test.

        .EXAMPLE
            Test-PrivateIP -IP 172.16.1.2
    #>
    param(
        [string]$IP
    )

    if ($IP -Match '(^127\.)|(^192\.168\.)|(^10\.)|(^172\.1[6-9]\.)|(^172\.2[0-9]\.)|(^172\.3[0-1]\.)') {
        $true
    }
    else {
        $false
    }
}