Comcast Cable Communications, LLC CBC-CM-4 (NET-173-8-0-0-1) 173.8.0.0 - 173.15.255.255 Comcast Cable Communications, LLC CBC-SFBA-12 (NET-173-8-128-0-1) 173.8.128.0 - 173.8.191.255 IFPA IFPA (NET-173-8-190-48-1) 173.8.190.48 - 173.8.190.63