If you have a router that has a MAC address cloning feature, you can clone a different MAC address into it. This will force their DHCP server to assign a new / different public IP address to your connection.
I am not a Comcast Employee. I am a Customer Expert volunteering my time to help other customers here in the Forums. We ask that you post publicly so people with similar questions may benefit from the conversation. Was your question answered? Mark the post as Best Answer!