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-RICHMOND-21 (NET-50-199-16-0-1) 50.199.16.0 - 50.199.31.255 Comcast Cable Communications, LLC RICHMOND-CCCS-9 (NET-50-199-16-0-2) 50.199.16.0 - 50.199.31.255