Optimum Online NETBLK-OOL (NET-24-188-0-0-1) 24.188.0.0 - 24.191.255.255 Optimum Online (Cablevision Systems) OOL-CPE-BRFDNJ-24-191-208-0-20 (NET-24-191-208-0-1) 24.191.208.0 - 24.191.223.255