Yep, it's Comcast coax. Probably the easiest thing to do is to dig down a couple of inches and bury it. Comcast will send someone out of you don't want to do it.
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!