A:Answer Probably not. When I was a Comcast XFINITY customer, their feed to our home came in on coaxial ("coax") cable. The Netgear WNDR3400-100NAS router has no coax ports on it. I'm using this router with a different ISP which I'm using because I moved to a rural area that does not have Comcast service. When I was a Comcast customer, I used a Netgear C3700-100NAS DOCSIS 3.0 Cable Modem, and it worked very well for us.