23.21.0.0-23.21.63.255 23.21.0.0/18
23.21.64.0-23.21.79.255 23.21.64.0/20
23.21.80.0-23.21.87.255 23.21.80.0/21
23.21.88.0-23.21.89.255 23.21.88.0/23
23.20.0.0-23.20.255.255 23.20.0.0/16