Comcast Cable Communications, LLC CCCH3-4 (NET-50-128-0-0-1) 50.128.0.0 - 50.255.255.255 Comcast Cable Communications, LLC CBC-ILLINOIS-22 (NET-50-254-0-0-1) 50.254.0.0 - 50.254.63.255 Comcast Cable Communications, LLC CHICAGO-CCCS-19 (NET-50-254-0-0-2) 50.254.0.0 - 50.254.63.255