Cox Communications Inc. NETBLK-COX-ATLANTA-11 (NET-72-192-0-0-1) 72.192.0.0 - 72.223.255.255 Cox Communications NETBLK-WI-RDC-72-204-0-0 (NET-72-204-0-0-1) 72.204.0.0 - 72.204.127.255