(Not a Comcast/Xfinity customer? Then click your service provider tab above or on the left to find modems.)
Comcast (Xfinity) Approved DOCSIS 3.0 and DOCSIS 2.0 Cable Modems
Modem list updated March 2015. Prices updated every hour.
Below are all the modems on the Comcast Approved Cable Modem List and that can be bought at Amazon, Walmart or Best Buy. There are over 45 different modems on that list and we've gone through all of them to find the ones that can be purchased at major retailers.
If you're paying $10 a month to rent a modem from Comcast, that's $120 a year or $600 over 5 years. You can buy a new one that will pay for itself in less than one year. Its easy to install. Just hookup modem, open web browser on attached computer and follow the on-screen instructions.
Note: These modems will not work if you have Comcast/Xfinity Voice or Triple Play. Read this for more information: Comcast Voice Modems
DOCSIS 3.0 Cable Modems
Comcast recommends that you buy a DOCSIS 3.0 modem for all of their internet plans. All of these modems below will work on all plans: Economy, Performance, Ultra, Blast! and Extreme. For Extreme 150 plans, choose a modem with 8-channel downstream bonding to maximize your speed. Those are ARRIS/Motorola SBG6580, SBG6782, SB6141, SB6183, Netgear C3000, CG3000Dv2, C3700 and Zoom 5352.
All of these modems are high quality and have pretty much the same features, except of course those with routers built in. So don't worry too much about deciding which one to buy. Price should be the most important factor. Buy one now and start saving those rental fees!
DOCSIS 2.0 Cable Modems
Comcast does not officially support DOCSIS 2.0 modems anymore. These used to work, but we cannot recommend them anymore.
Comcast Voice or Triple Play Customers:
You will need a cable modem called an EMTA modem. Not all Comcast regions let you buy your own EMTA modem. In some regions, you can buy them only from Best Buy. There will be a Comcast/Xfinity kiosk in the Best Buy store. For other regions, call your local Comcast service center and check if they allow customer owned EMTA modems. If so, the following ones can be bought from Amazon (these links take you to Amazon): Arris TM822 Touchstone DOCSIS 3.0 8x4 Ultra-High Speed Telephony Modem, Arris TM722g Cable Modem Docsis 3.0, or Arris TG862G DOCSIS 3.0 Residential Gateway with 802.11n, 4 Port Router and 2 Voice Lines. Please call Comcast before purchasing to save lots of headaches and troubles.
Another option is get rid of Comcast Voice and sign up with a voice over IP (VoIP) company such as Callcentric. For $3.45 per month plus 1.5 cents per minute (other pricing plans available), you can use your current phone number, get free voice mail, caller id, forward your messages to your email, message text alerts, block and forward certain calls, 911 service; all the features of Comcast Voice
plus many more. Quality is as good as Comcast's. If you don't use your home phone much anymore, this is a great option. Now, you could buy your own modem and save even more per month. We've been using Callcentric for almost 5 years now and absolutely love it.
How we set-up Callcentric plus more information
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