13.248.144.0-13.248.159.255 13.248.144.0/20
13.248.160.0-13.248.191.255 13.248.160.0/19
13.248.192.0-13.248.223.255 13.248.192.0/19
13.248.224.0-13.248.239.255 13.248.224.0/20