$IP = Get-NetIPAddress -InterfaceAlias "Ethernet*" -AddressFamily IPv4| select -ExpandProperty IPAddress
$SN = Get-NetIPAddress -InterfaceAlias "Ethernet*" -AddressFamily IPv4| select -ExpandProperty PrefixLength
$splitIPs = $ip.Split(".")

switch ($SN)
{
    8
    {
        for ($i = 1; $i -le 254; $i++)
        {
             for ($j = 1; $j -le 254; $j++)
            {
                 for ($x = 1; $x -le 254; $x++)
                {
                   Test-Connection '$SplitIPs[0].$i.$j.$x'-Count 1 #-ErrorAction SilentlyContinue
                }
            }
        }
    }

    16
    {
        for ($i = 1; $i -le 254; $i++)
        {
             for ($j = 1; $j -le 254; $j++)
            {
                Test-Connection '$SplitIPs[0].$SplitIPs[1].$i.$j'-Count 1 #-ErrorAction SilentlyContinue
            }
        }
    }

    24
    {
        for ($i = 1; $i -le 254; $i++)
        {

            $IP = "$SplitIPs[0].$SplitIPs[1].$SplitIPs[2].$i"
            Test-Connection "$SplitIPs[0].$SplitIPs[1].$SplitIPs[2].$i" -Count 1 #-ErrorAction SilentlyContinue
        }
    }
}