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Comcast (Xfinity) Approved DOCSIS 3.0 and DOCSIS 2.0 Cable Modems

Modem list updated April 2016. 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.

Comcast / Xfinity Triple Play or Voice customers: The modems listed immediately below will not work if you have Comcast/Xfinity Voice or Triple Play. To see modems that will work, read this: Comcast Voice Modems


DOCSIS 3.0 Cable Modems

Cable Modem Buying Tips and FAQ's

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 at least 8-channel downstream bonding to maximize your speed. These are the ARRIS/Motorola SB6141, SB6183, SB6190, SBG6580, SBG6782, Netgear C3000, CG3000Dv2, C3700, C6300 and Zoom 5354.

Comcast business customers should buy either the ARRIS/Motorola SB6141, SB6190 or the SB6183 for all plans up to and including Deluxe 100 Plus. For the Deluxe 250 plan, only the SB6183 and the SB6190 will maximize your speeds.

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!

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ARRIS / Motorola SB6141 SURFBoard DOCSIS 3.0 Cable Modem

The ARRIS / Motorola SB6141 is the updated version of their popular SB6121. It has 8-channel downstream bonding and 4-channel upstream, twice the maximum download speed of the SB6121 (Comcast / Xfinity has put the SB6121 on the end of life, EOL, list.) Not sure which one to buy? Buy this one. The newest version of the SB6141 is the SB6183, which has twice the maximum download speed of the SB6141. Supports IPv6 and IPv4 addressing. Works with Windows, Mac, or Linux computers.

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  • 4.6/5 (6,776 ratings counted at all sellers)

31% of March's visitors who bought a DOCSIS 3.0 modem, bought this one.

ARRIS / Motorola SBG6580 SURFboard DOCSIS 3.0 Gateway Wireless Cable Modem

The ARRIS / Motorola SBG6580 has a built-in dual band wireless-N router. It also has 4 Gigabit Ethernet Ports. 8-channel bonding downstream, 4-channel upstream. Supports IPv6 and IPv4 addressing. Works with Windows, Mac, or Linux computers.

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  • 3.8/5 (4,221 ratings counted at all sellers)

9% of March's visitors who bought a DOCSIS 3.0 modem, bought this one.

ARRIS / Motorola SB6183 SURFBoard DOCSIS 3.0 Cable Modem

The ARRIS / Motorola SB6183 is one of the latest versions in their Surfboard series. With 16-channel downstream bonding and 4-channel upstream, it can handle the fastest internet plans. As the price of this modem has fallen, it's becoming the one to buy to really future-proof yourself as ISP's increase speeds. The newest version of the SB6183 is the SB6190, which has twice the maximum download and upload speed of the SB6183. Supports IPv6 and IPv4 addressing. Works with Windows, Mac, or Linux computers.

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  • 4.6/5 (342 ratings counted at all sellers)

16% of March's visitors who bought a DOCSIS 3.0 modem, bought this one.

ARRIS / Motorola SBG6782 SURFboard eXtreme 802.11ac DOCSIS 3.0 Cable Modem and 4-Port Gigabit Ethernet Router

The ARRIS / Motorola SBG6782 is the latest modem from ARRIS/Motorola. It has a built-in wireless-AC router, for the fastest WIFI speeds. It also has 4 Gigabit Ethernet Ports. We normally don't recommend modem/router combos, but this is an exception. 8-channel downstream, and 4-channel up and is a few inches bigger than other modems. Supports IPv6 and IPv4 addressing. Works with Windows, Mac, or Linux computers.

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  • 4.2/5 (832 ratings counted at all sellers)

12% of March's visitors who bought a DOCSIS 3.0 modem, bought this one.

ARRIS / Motorola SB6190 SURFBoard DOCSIS 3.0 Cable Modem

The ARRIS / Motorola SB6190 is the latest version in their Surfboard series. With 32-channel downstream bonding and 8-channel upstream, it can more than handle the fastest internet plans now and into the future. Supports IPv6 and IPv4 addressing. Works with Windows, Mac, or Linux computers.

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  • 4.6/5 (245 ratings counted at all sellers)

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Amazon $149.99
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Netgear N300 WiFi DOCSIS 3.0 Cable Modem Router (C3000)

The Netgear N300 has a built-in wireless-N router. It has 2 Gigabit Ethernet ports plus a USB 2.0 port for attaching a network drive. 8-channel bonding downstream, with 4-channel upstream. Supports IPv6 and IPv4 addressing. Works with Windows, Mac, or Linux computers.

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  • 4.1/5 (269 ratings counted at all sellers)

4% of March's visitors who bought a DOCSIS 3.0 modem, bought this one.

Netgear N450 WiFi DOCSIS 3.0 Cable Modem Router (CG3000Dv2)

The Netgear N450 has built-in wireless-N router, rated at 450 Mbps, faster than the Netgear N300 which is rated at 300 Mbps. It has 4 Gigabit Ethernet ports and a USB 2.0 port. Plenty of speed with 8-channel bonding downstream and 4-channel upstream. Supports IPv6 and IPv4 addressing. Works with Windows, Mac, or Linux computers.

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  • 4.1/5 (392 ratings counted at all sellers)

3% of March's visitors who bought a DOCSIS 3.0 modem, bought this one.

Netgear N600 WiFi DOCSIS 3.0 Cable Modem Router (C3700)

The Netgear N600 has built-in dual band wireless-N router. If you have devices with dual band too, you can get exceptional WiFi speed. It also has 2 Gigabit Ethernet ports, a USB 2.0 port and 8-channel bonding downstream, 4 upstream. Supports IPv6 and IPv4 addressing. Works with Windows, Mac, or Linux computers.

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  • 4.1/5 (592 ratings counted at all sellers)

3% of March's visitors who bought a DOCSIS 3.0 modem, bought this one.

Netgear AC1750 Wireless-AC DOCSIS 3.0 Cable Modem Router (C6300)

The Netgear AC1750 has a built-in dual band wireless-AC router. With 16-channel bonding downstream, 4 upstream plus the AC router, its one of the fastest wireless modems available. It also has 4 Gigabit Ethernet ports and a USB 2.0 port. Supports IPv6 and IPv4 addressing. Works with Windows, Mac, or Linux computers.

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  • 4.3/5 (917 ratings counted at all sellers)

3% of March's visitors who bought a DOCSIS 3.0 modem, bought this one.

Zoom 5341J DOCSIS 3.0 Cable Modem

The Zoom 5341J is the updated version of the 5341. It has 8-channel bonding for downloading, doubling the maximum download speed of the 5341. Supports IPv6 and IPv4 addressing. Works with Windows, Mac, or Linux computers.

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  • 4.5/5 (976 ratings counted at all sellers)

5% of March's visitors who bought a DOCSIS 3.0 modem, bought this one.

Zoom 5354 DOCSIS 3.0 Cable Modem plus Wireless N300 Router

The Zoom 5354 is a cable modem with a built-in N300 wireless-N router. It has 4 Gigabit Ethernet ports, and with 8 channel bonding downstream, should handle any speeds your cable company might provide well into the future. Supports IPv6 and IPv4 addressing. Works with Windows, Mac, or Linux computers.

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  • 4.1/5 (167 ratings counted at all sellers)

3% of March's visitors who bought a DOCSIS 3.0 modem, bought this one.

Netgear CMD31T DOCSIS 3.0 Cable Modem

The Netgear CMD31T, made by the company known for their network devices, has 4-channel bonding for both upstream and downstream. Supports IPv6 and IPv4 addressing. Works with Windows, Mac, or Linux computers.

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  • 4.0/5 (733 ratings counted at all sellers)

1% of March's visitors who bought a DOCSIS 3.0 modem, bought this one.

SEE IT NOW AT:NEWUSED
Amazon $70.00 $30.00

DOCSIS 2.0 Cable Modems

(Scroll up or click here for DOCSIS 3.0 modems)
Cable Modem Buying Tips and FAQ's

Comcast does not officially support DOCSIS 2.0 modems anymore. These used to work, but we cannot recommend them anymore.

Motorola Surfboard SB5101U DOCSIS 2.0 Cable Modem

The Motorola SB5101U is an updated version of the SB5101. In addition to the Ethernet port, it has a USB port.

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  • (1,013 ratings counted at all sellers)
SEE IT NOW AT:NEWUSED
Amazon $49.95 $29.95

Motorola Surfboard SBG901 DOCSIS 2.0 Wireless Cable Modem

The Motorola SBG901 has a built-in wireless-G router and has an Ethernet port. We're not a big fan of these modem/router combos, but if you don't need the features of the latest routers, this will work just fine.

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  • (301 ratings counted at all sellers)
SEE IT NOW AT:NEWUSED
Amazon $88.49 $14.95

Comcast Voice or Triple Play Customers:

You will need a cable modem called an EMTA or telephony modem. Not all Comcast regions let you buy your own EMTA modem. Call your local Comcast service center and check if they allow customer owned EMTA modems. If so, the following can be bought from Amazon (these links takes you to Amazon):

These are the only retail modems that will work with Comcast phone service. Many people have bought the Arris TM822G retail version (See at Amazon: Arris TM822G Touchstone DOCSIS 3.0 8x4 Ultra-High Speed Telephony Modem), but Comcast says it might not work now or in the future when they do a firmware update. Here's a link to that discussion on the Comcast forum: Retail TM822G Discussion. We recommend not buying the TM822G and buying one of the others listed above instead.

The TM722g has 4-channel downstream while the TG862G has 8. If you don't need the built in WIFI router of the TG862G, you can put it in bridge mode and use your own WIFI router. Please call Comcast before purchasing any EMTA modem 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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Comments

Full StarFull StarFull StarHalf StarEmpty Star 3.5 (12)
1 2 > [last]
Sue (Dublin) says...
Thanks for this thread, Dan. It has been helpful. Can you confirm that if I purchase the retail Arris TG862G (or any other retail EMTA modem/router that I won't have the "xfinitywifi" open network that is now embedded on my leased version? That is my ultimate goal as we are pretty sure someone near us is using our wifi, even though Comcast insists it won't drain our speed. Thanks!
11th April 2016 12:23pm
Dan says...
You can turn off the "xfinitywifi" open network or Home Hotspot as Xfinity calls it whether you buy or lease your modem. You have to log into your Comcast account online. Here's the instructions straight from Xfinity: Xfinity instructions to turn off Home Hotspot
11th April 2016 12:47pm
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Chae says...
I have comcast 25 mbps plus two phone lines. I'm thinking of getting the 75 mbps service and cut out one or both phone lines.If I cut out both lines, Comcast is quoting $100. If keep a phone line, it's $80. So, I may go with the $80 option, replace the modem with the one you recommend, and get that callcentric service for the second line. So, do I start with callcentric, get that ported over, then replace the modem, then connect the second line with the ATA adapter? Is this the order of ops? thx in advance.
26th February 2016 10:52pm
Dan says...
That's the order I would do it in so there's no disruption in your phone service . It can take a week or two to port over your number to Callcentric.
8th March 2016 2:01pm
cynthia barrows (Sacramento) says...
Im looking for a "cheap" DOCSIS 3.0 modem compatible with xfinety comcast cable? Asap where can i get one by tomarrow?
24th February 2016 3:54pm
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Kameal Evangel Celestee (Mount Juliet) says...
I just wanned to mention that I bought an Arris / Motorola SB6190, it is similar to the SB6141 and the SB6183 except it supports 32 channel downstream. I bought mine from Best Buy (where I work) and Comcast were able to configure it withoit any issues. I pay Comcast for a 10mbps download speed but I am currently receiving 12mbps. I realise this modem is a bit more expensive, however it is well worth it for the extra speed.
10th February 2016 11:50am
Dan says...
Thanks for that. We're in the process of adding it to our site. In the meantime here's a link to it at Amazon: ARRIS SB6190 at Amazon
10th February 2016 12:09pm
Dan says...
And here's the link to Best Buy: ARRIS SB6190 at Best Buy
10th February 2016 1:40pm
Dan says...
We added the SB6190 to our site. Here it is: ARRIS/Motorola SB6190
18th March 2016 7:58pm
jenja jose (St. Paul) says...
No EMTA on this model, so my understanding is it can't work with comcast bundled services, right? My question, can i use it anyway if I don't care about landline?
13th February 2016 3:55pm
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Rich (La Grange.) says...
Any recommendations on modem/router having very good range/ or which don't
6th February 2016 2:53am
Tim (Vail) says...
I have Xfinity triple play. Went to Amazon to buy and some of the comments say there is a newer version of the Arris TG862G. Do you know the model number and whether it is compatible with Comcast? The voice part really puts you in a limited selection for modems.
6th January 2016 4:26pm
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Paul Jones (New Castle) says...
Worst service I've every had. Plus you can't understand the people. Goin to Metronet
27th November 2015 9:48pm
Shelly (Miami Gardens) says...
Hey I'm looking into comcast internet and don't want to lease what modem should I get? In the 33054 area
23rd October 2015 9:22pm
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irive006 (Miami) says...
For Comcast, go with the Motorola SB6141. its going to cost you around $70. Easy to get up and running.
1st November 2015 7:37pm
Jimmy says...
These are expensive.
19th October 2015 8:55pm
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James Browne (San Francisco) says...
Will Comcast allow you to use your own Arris TG 862G Docsis3.0 cable modem for Triple Play in the 94115 Zip Code area. I don't want to rent a modem at $10 per month.
14th September 2015 1:15pm
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Dennis (Fremont) says...
How about the Arris TM822G? Does it work ok with triple play xfinity X1?
30th August 2015 2:48pm
Dan says...
Yes it does. So does the Arris TG862G. Both are linked above. The X1 service is the TV service, the internet service is the same for X1 and non-X1 subscribers.
31st August 2015 12:09pm
Dennis (Fremont) says...
Thanks Dan. I've read that Comcast will not activate these modems since they are not on their 'retail' list?!!! I would like to purchase one and return the POS they lease me but if this is true, I'm guessing there's some screwing going on here by Comcast. You know anything about this?
31st August 2015 1:53pm
1 2 > [last]
Page 1 of 2  (36 comments)


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Internet Service Providers

Choose yours to find a supported modem:

Comcast

Cox

Charter

Cable ONE

Suddenlink

Time Warner/Road Runner/Bright House


Approved Modems Lists

Click below to see a list of compatible and approved modems. These take you directly to their websites.

Comcast

Cox

Charter

Cable ONE

Suddenlink

Time Warner/Road Runner/Bright House


Other Helpful Links

Low Cost Cable Phone Service Alternative

Wireless Router Buying Guide

Cable Modem Buying Tips and FAQ's