50.19.136.0-50.19.143.255 50.19.136.0/21
50.19.144.0-50.19.151.255 50.19.144.0/21
50.19.152.0-50.19.153.255 50.19.152.0/23
50.19.154.0-50.19.154.255 50.19.154.0/24