Optimum Online NETBLK-OOL-9BLK (NET-24-146-128-0-1) 24.146.128.0 - 24.146.255.255 Optimum Online (Cablevision Systems) OOL-CPE-NYX4NY-24-146-240-0-21 (NET-24-146-240-0-1) 24.146.240.0 - 24.146.247.255