Receiving Start End CIDR Database Address Address Block ARIN 160.1.0.0 - 160.1.255.255 160.1.0.0/16 RIPE 171.16.0.0 - 171.33.255.255 171.16.0.0/12, 171.32.0.0/15 ARIN 171.64.0.0 - 171.67.255.255 171.64.0.0/14 ARIN 171.68.0.0 - 171.71.255.255 171.68.0.0/14 ARIN 171.72.0.0 - 171.72.255.255 171.72.0.0/16 ARIN 171.73.0.0 - 171.79.255.255 171.73.0.0/16, 171.74.0.0/15, 171.76.0.0/14 ARIN 171.128.0.0 - 171.206.255.255 171.128.0.0/10, 171.192.0.0/13, 171.200.0.0/14, 171.204.0.0/15, 171.206.0.0/16