Some of the highest-recommended modems compatible with Comcast include the Arris/Motorola Surfboard SB6141 and SB6183 models and the Netgear CM400-100 NAS. While Comcast provides modems for subscribers at a fee, customers can choose to use their own instead.
Experts rate the Arris/Motorola SB6141 highly partly because it is compatible with many different cable companies, so it is easy to adapt it if an owner moves to a different city. The Netgear model is less-expensive but compatible with fewer systems. The Arris/Motorola SB6183, on the other hand, is considered great but more expensive, and fewer people are likely to find its added features to be useful.