3.161.71.0-3.161.71.255 3.161.71.0/24
3.161.72.0-3.161.79.255 3.161.72.0/21
3.161.80.0-3.161.95.255 3.161.80.0/20
3.161.96.0-3.161.127.255 3.161.96.0/19
3.161.128.0-3.161.255.255 3.161.128.0/17