138.68.40.0-138.68.47.255 138.68.40.0/21
138.68.48.0-138.68.63.255 138.68.48.0/20
138.68.64.0-138.68.127.255 138.68.64.0/18
138.68.128.0-138.68.191.255 138.68.128.0/18