Optimum Online NETBLK-OOL-4BLK (NET-67-80-0-0-1) 67.80.0.0 - 67.87.255.255 Optimum Online (Cablevision Systems) OOL-CPE-LYBRNY-67-83-184-0-21 (NET-67-83-184-0-1) 67.83.184.0 - 67.83.191.255