172.189.8.0-172.189.15.255 172.189.8.0/21
172.189.16.0-172.189.31.255 172.189.16.0/20
172.189.32.0-172.189.63.255 172.189.32.0/19
172.189.64.0-172.189.127.255 172.189.64.0/18
172.189.128.0-172.189.255.255 172.189.128.0/17
172.190.0.0-172.191.255.255 172.190.0.0/15