The Arris SB6190(direct price) remains the best Comcast compatible modem approved for Xfinity, but there are cheaper compatible DOCSIS 3.0 devices we have listed below as well as the top voice modem and best modem router combo. Best wireless router to use with Comcast? We have 4 options for you depending on how big your house is.
View Budget Modem
Save $10 a month, $120 a year. Replace your rental with one of these approved cable modems and it will pay for itself in less than a year and save $10 every month forever.
Get faster speeds! Improve your download speeds. Often times you’ll get better constant speeds with your replacement higher bonded channel modem. No more intermittent slow periods.
Comcast Approved Modems
- Arris SB6190: Fastest Modem
32 download channels. Up to 1.4Gbps.
- Arris SB6183: Price Check
16 download channels. Up to 686Mbps.
- Netgear CM500: Cheaper Modem
16 download channels. Up to 680Mbps.
- Combo Modem Router: Modem List
Modem + Router in one.
- Xfinity Voice Modem: Modem List
Required w/ Voice.
You must use a voice modem if you have Triple Play, even if you do not use the voice.
If you don’t have a wireless router, pick one from the next section.
Best Wireless Router For Comcast
- Wireless AC2400: Price Check
Most common, good for an apartment / small home.
- Wireless AC3100: Price Check
Best for a 2 story home or condo.
- Wireless AC5300: Price Check
Needed for a large house, 2 or 3 story home.
- Wireless Mesh Kit: Price Check
Best of the best for large houses and mansions.
The ASUS is the perfect wifi router for most sized homes. It is compatible with Comcast, Time Warner, COX and all internet service providers. It plugs directly into the cable modem and cast a strong wireless signal. Full router review.
If you have an even larger home, there is a new technology by the name of “wireless mesh”. It can be explained in full detail on our wireless mesh review.
*Notes: The actual best modem is the SB6190 but if you are not going to ever get Gigabyte speeds, the SB6183 or the CM500 is the cable modem for you. They are both DOCSIC 3.0 full performance modems. At this point it comes down to color preference and of course the fact that the Netgear CM500 is possibly cheaper. Otherwise, they are the same. Compatible with all Xfinity internet packages. That includes all Performance, Blast, and Extreme packages.
Is higher channel bonding better? (download channels)
For future proofed 1 Gigabyte fastest speeds, the 32 bonded channel SB6190 is the fastest modem to get. You might as well as you’ll own this modem forever and Gig speeds will be a standard tier package soon.
Do you need a voice modem for Triple Play?
Please note that if you have Xfinity Triple Play with voice, then you can not use any regular replacement modems listed here. You are forced to get a telephony EMTA voice modem from the list. It is your only option, even if you do not use the actual telephone part of the service. This is not that bad because you can get a combo voice modem / router with a wireless AC1900 strength. They used to lack good options for voice users but have recently released new better modems.
Isn’t a combo modem router the best option?
Why we highly recommend two devices over the combo modem with wireless built in.
- Reason one: Two devices are better. The cable modem stand alone and any of the mentioned routers will have better performance than the combo modem gateway. The higher cost comes from better equipment. If you have a small studio or 1 bedroom and don’t need the best, get the combo.
- Reason two: The 2 separate units makes it easier to replace if something goes bad. This should not be an issue but life happens. With a combo unit, the whole thing must be replaced.
- Reason three: Nerd options. The ASUS GUI dashboard gives you a lot more control. It is simple and intuitive for even the non skilled. A great way to start learning networking from home.
- Reason four: The real reason, they are better routers. You will get high speeds at distance with the stronger routers. The end.
Do not buy a used modem!
Do not buy a used modem. Because they are used, that have already been added to another Comcast users account and many times in another state. The account is usually closed and the equipment MAC address is still on there. You will not have permission to remove the device so that you can add it to your account. The agent will require you to visit a Comcast Cable Store and bring the physical modem for them to verify and add to your account. You’ve been warned, do not buy used.
End Of Life Modems – ARRIS SB6141? Netgear CM400?
People are concerned that the (16×4) Arris or Netgear modems will be end of lifed. These are solid long term DOCSIS 3.0 modems. They are much newer technologies and have enough download channels to sustain all current cable networks and the next waves. However, older (8×4) modems with only 8 down channels such as the SB6141 or CM400, are starting to be removed from the internal supported devices list. According to several of our readers statements, those modems are no longer on the approved list for Xfinity.
As for the (16×4) DOCSIS 3.0 modems, even if they were added to an end of life list in 8 years, they would continue to work if the mac address was already added to your internet account. You just would not be able to activate it on a new account.
If you really want the best future proofed modem, then you must get the (32×8) SB6190 modem. It will handle gigabit speeds when available in your area. That could take a long time but it will be a thing some day.
Benefits to buying your own modem
- Save $10 a month forever
- Disable Comcast’s “public hotspot” coming out of your router
- More control over your network
- Get better speeds
- Newer technology
Save $10 a month on Comcast internet bill.
If you stop renting from Comcast, you will save $10 a month. They are charging you to rent their old modem. This means in just one year, you will have saved $120. It adds up. I have used Comcast for over 12 years meaning I have saved $1,200 dollars on my internet bill.
Improve your Comcast speeds.
In most cases, people experience improved speeds when they buy their own modem. Reason being these are the latest DOCSIS 3.0 modems, they have higher bonded channels than most provided modems, they are newer technology and run cooler than the rental modems that often overheat and reboot or cause random disconnects from other malfunctions. So overall, you can expect an improvement in your reliability of service.
The right technology ensured.
These are for the current DOCSIS 3.0 networks used by all internet providers. Meaning, this modem not only works for Comcast, it works for any major cable ISP running on the DOCSIS 3.0 network such as Time Warner, Charter, Cox, Mediacom and more. Due to its many bonded channels, even with all four of us in the house streaming Netflix or playing video games online at the same time, it still has bandwidth leftover.
How do I install my modem?
You don’t have to install anything. This modem is a plug and play device, meaning all you do is plug it in and it works. All you have to do is call COX, give them the MAC Address so they can add it to your account and you are done. They know this call very well and will not be giving you trouble. They will simply do it and you’ll be done forever. The mac address is on the bottom of the modem on a sticker, it is clearly labeled.
Check Out These Fastest Modem Speeds.
You can verify your modem speeds via the online SpeedTest. Here is information from my modem test. Even though I am only supposed to get 100Mbps, I always get around 120Mbps with this modem. Older modems I was forced to rent from Comcast would often times be stuck around 30Mbps. Your results will vary base don cable provider, speed package and location.
Notice how it says faster than 90% of the US?
This is because most people rent a modem.
Join the boycott!
If I want fast internet, I am forced to subscribe to Comcast. But I can save myself $10 a month and keep my money from them. This is about all one can do when it comes to boycotting Comcast, so join me in the fight and buy your own modem.
Good luck, please feel free to ask questions below!
- Comcast Compatibility Checker, Xfinity
- Channel Bonding Explained, Netgear Youtube
- Comcast Public Hotspot, CNN Money
- What is DOCSIS 3.0?, Wiki Info
- Run Your Own Speed Test, SpeedTest.net
- Approved Modems Only, Xfinity FAQ
- Spectrum Approved Modems, Spectrum
- Cox Supported Modems, COX Cable Internet
- CM500 Specs, Netgear Data Sheet
- Comcast SB6183 Specs, Comcast Xfinity