The best Comcast modems and routers compatible and approved for Comcast Xfinity Extreme, Blast and Performance cable internet. As well as the newer Comcast Gigabit, future proofed DOCSIS 3.1 modems. We will also cover the best Xfinity modem router combo, also known as a gateway.
Get faster speeds! Improve your download speed. Often times you’ll get faster and better constant download speeds with your replacement higher bonded channel modem for Comcast. No more intermittent slow periods or monthly rental fee when you buy a high speed modem such as the ARRIS Surfboard, designed specifically for Comcast Xfinity internet.
Best Comcast Modem Xfinity Approved
- Motorola MB8600 – Fastest Modem: Amazon Price
DOCSIS 3.1. Gigabit, Extreme, Comcast Blast and Performance.
- NETGEAR CM600: AmazonPrice
32 download channels. Extreme, Xfinity Blast and Performance.
- Netgear CM500 – Budget Modem: Amazon Price
16 download channels. Extreme, Blast and Performance.
- Xfinity Voice Modem: Best Voice Combo
Required with voice package but you have more voice modem options.
Important Note: You must use a voice modem if you have Triple Play, even if you do not use the voice.
With the stand alone cable modems, you have several options depending on what speed package you subscribe to. The best choice here would be the MB8600 DOCSIS 3.1 future proofed Comcast Gigabit modem. If you’re not looking to go all out and be ready for next generation speeds, then the current DOCSIS 3.0 top modem choice would be the CM600. It can handle Comcast Extreme, Blast and Performance internet. If you are going for the cheapest modem, the Netgear CM500. The truth is the Netgear will likely serve all of your needs if you are staying with your current internet speeds and do not plan on upgrading to Gigabit. The important part would be which router you get to pair with this budget modem. Pick from the router selection below.
Best Router For Comcast WiFi
- Wireless AC2400: Price Check
Most common, good for an apartment / small home.
- Wireless AC3100: Price Check
Best for a normal sized 2 or 3 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 the largest houses and mansions.
The ASUS is the perfect Xfinity wifi router for most sized homes. It is compatible with Comcast Xfinity and all other internet service providers. It plugs directly into the high speed cable modem and cast a strong wireless signal.
If you have an even larger home, there is a new technology by the name of “wireless mesh”, explained in full detail on our wireless mesh review.
Best Comcast Modem Router Combo
- Netgear Nighthawk X4S C7800: Best Combo Modem
DOCSIS 3.1. Comcast Gigabit, Extreme, Blast and Performance.
- Gateway Combo Modem Router: Cheaper Combo Modem
24 download channels. Comcast Extreme, Blast and Performance.
With the combo modem routers, you have the same choice to make. Get the future proofed for Comcast Gigabit speeds DOCSIS 3.1 modem, or the current best DOCSIS 3.0 combo router by Netgear. There is another huge difference here though, the DOCSIS 3.1 combo router has Wireless AC3200 built in, while the DOCSIS 2.0 is only Wireless AC1900. So the bigger the house, the stronger the signal. You decide.
*Notes: The actual best modem for Comcast Extreme is the MB8600 but if you are sticking with Comcast Blast or lower, the Netgear CM600 or the Netgear CM500 is the cable modem for you. They are both DOCSIS 3.0 full performance fast internet modems. At this point it comes down to color preference and of course the fact that the Netgear CM500 is much cheaper. Otherwise, they are the same. Compatible with all Xfinity packages. They include all Performance, Blast, and Extreme packages. If you ever plan on getting the Gigabit packages, you need the DOCSIS 3.1 modem, the MB8600.
Save $10 a month, $120 a year. Replace your rental modem with one of these approved cable modems for Comcast Xfinity internet and it will pay for itself in less than a year and save $10 every month forever.
Is higher channel bonding better? (download channels)
For future proofed 1 Gigabyte fastest speeds, the best DOCSIS 3.1, it is the fastest cable modem you can get. You might as well as you’ll own this modem forever and Gig speeds will be a standard tier package soon. Video explanation.
Do you need a voice modem for Xfinity 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 gateway modem router 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.
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 cable internet when they called and tried to have them activated. 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.
If you really want the best current DOCSIS 3.0 modem, then you must get the (24×8) Netgear CM600 modem. Best current DOCSIS 3.1 modem, the MB8600.
Benefits to buying your own Xfinity modem
- Save $10 a month forever, no more rental fee
- Disable Comcast’s “public hotspot” coming out of your router
- More control over your network
- Get better download speeds
- Newer technology
Save $10 a month on Comcast internet bill.
If you stop renting your modem 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 14 years, meaning I have saved $1,680 dollars on my cable internet bill.
Improve your Comcast internet download speeds.
In most cases, people experience improved speeds when they buy their own retail 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 more reliability and an improvement in your internet service.
These are for the current DOCSIS 3.0 networks used by all cable internet providers. Meaning, this modem not only works for Comcast, it works for any major cable ISP running on the DOCSIS 3.0 network. 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 cable modem?
You don’t have to install anything. This Surfboard 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 Comcast, give them the MAC Address so they can add it to your Xfinity internet 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 cable internet modem speeds via the online SpeedTest. Here is the download speed results from my Arris Surfboard SB6183 modem test. Even though I am only supposed to get 100Mbps, I always get around 120Mbps with this cable modem. When I was forced to rent from Comcast I would often times be stuck around 30Mbps even though I was paying for better speeds. Your results will vary based on your cable internet provider, speed package and location.
Notice how it says faster than 90% of the US?
This is because most people do not own their own replacement cable modem.
Test your speed.
Join the boycott!
If I want fast download speeds, I am forced to subscribe to Comcast Xfinity high speed internet. But I can save myself $10 a month in rental fees and keep my money away 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 replacement modem.
Good luck, please feel free to ask questions below!