http://mynewmodem.comcast.net/ http://mynewmodem.comcast.net/ Lists most of the modems you can purchase from amazon. They have a slightly larger list of support

http://mynewmodem.comcast.net/ http://mynewmodem.comcast.net/ Lists most of the modems you can purchase from amazon. They have a slightly larger list of supported modems but many of them are noy sold to the public like some Cisco models.