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

Modem list updated February 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, SBG6580, SBG6782, Netgear C3000, CG3000Dv2, C3700, C6300 and Zoom 5354.

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

Show All Modems:

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)

37% of January'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)

10% of January'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 the latest version 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. 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)

25% of January'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)

10% of January's visitors who bought a DOCSIS 3.0 modem, bought this one.

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 January'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)

1% of January'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)

4% of January'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)

1% of January'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)

3% of January'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)

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

SEE IT NOW AT:NEWUSED
Amazon $85.18 $34.95

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 $50.00 $26.00

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 $79.99 $10.00

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

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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
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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
Dan says...
I had heard about this but it seemed the vast majority of people buying the retail Arris TM822G could get them to work. After doing some more research due to your comments, we're taking it off the list. You know this, but for others, there's a chance that either Comcast won't be able to provision the modem or after they push out a firmware update, the phone part won't work anymore. So for now, the only approved retail eMTA (telephony) modem that Comcast officially allows is the ARRIS TG862G. Its $20-$30 more than the TM822G and has a built-in WIFI. If you don't want to use the WIFI, you can turn it off and put it in bridge mode and use a different WIFI router.

The TM822g that is leased from Comcast still works. If your local Comcast says that the retail version will work, here's a link to it on Amazon: ARRIS TM822G

Here's a link to more discussion about the retail version of the TM822G on the Comcast forum: TM822G Retail Discussion
Admin:



31st August 2015 4:46pm
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Louis Pisarro (Mount Laurel) says...
The TM722g is NOT compatible with Comcast, it is end of life.
22nd June 2015 8:06pm
Dan says...
Thanks for the heads up, we took it off the list. Looks like the retail version just went on the end of life list. Apparently Arris isn't supporting it anymore.
22nd June 2015 10:28pm
Dan says...
The retail version of the ARRIS TM722g is no longer on the end of life (EOL) list. So we're listing it again. Comcast might of mistakenly placed it on that list.
22nd October 2015 4:27pm
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H M Motley (Richmond Va) says...
Interesting! I have triple play and am using an ARRIS 722G.

It's main problem is the very bad RF interference it puts out. I'm a ham radio operator and it puts out RF in the 160 meter band 1800-2000 kHZ. Are their newer models any cleaner?
Is there no other brand that will work?

26th June 2015 12:27am
Dan says...
If you already lease an ARRIS TM722G, it'll still work on Comcast. I think they're just recommending that customers not to buy one.

Sorry I don't know if any of the other models put out less RF interference. Anybody else have an idea?

26th June 2015 12:28pm
agudeza says...
Not according to Comcast. Go to the device info page on the comcast website and it clearly shows the TM722G is NOT an end of life modem as of yet.
31st October 2015 5:59pm
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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