Jump to: [Combo Modem/Router] | [Stand Alone Modem] | [Wireless Router]
Here we’re going to cover the best four modem router combo for Xfinity, stand-alone modems for Comcast, and routers in 2021. The only situation where you would need to seek out a different device is if you have a voice modem. We do explain the difference between the two in our easy to read combo modem router chart below.
This list of approved modems is compatible with Blast and Performance packages. We even cover the newer Comcast Gigabit, future-proofed DOCSIS 3.1 modems.
Choosing between a modem, router, or combo gateway can be confusing, so we will also cover this topic in-depth to provide you with the knowledge needed to make the right choice for your situation.
Modem Router Combo List
The modem router combo is both the modem and router in one single device. You do not need to buy anything else for this to work with Comcast internet. They are approved replacement devices authorized for use with Comcast Xfinity internet.
| Model | WiFi | Download | Channels | Speed | Price |
|---|---|---|---|---|---|
| Netgear C6250 | AC1600 | 300 Mbps | 16×4 – DOCSIS 3.0 | Performance | Amazon |
| Netgear C7000 | AC1900 | 500 Mbps | 24×8 – DOCSIS 3.0 | Blast | Amazon |
| Netgear C7100V | AC1900 | 500 Mbps | 24×8 – DOCSIS 3.0 | Voice Package | Amazon |
| Netgear C7800 | AC3200 | 1 Gbps | 32×8 – DOCSIS 3.1 | Gigabit | Amazon |
Choosing The Right Modem Router
- C6250: Best for most users in an apartment or single story home with Comcast Performance.
- C7000: Stronger wireless for multi-story homes with Comcast Blast.
- C7100V: Perfectly fine but required for any voice package, no exceptions.
- C7800: The strongest modem, required for Xfinity Gigablast.
Warning: You must use a voice modem if you have Triple Play, even if you do not use the voice. No exceptions.
This is the best option for almost all Comcast customers. The modem and router in one device giving it the name “combo modem” or “modem router“.
Why is it the best solution for you? Because it simplifies everything by putting both the modem and the WiFi router in one single device. In most cases, you will save money with this option making it the cheapest option for a quality approved replacement.
Now you know why it’s cheap and powerful making it the best replacement for Xfinity WiFi. Let’s take a look at the chart with approved combo modem routers.
Note: If you live in a larger 3+ story home, you should buy the modem and router separate to get the stronger WiFi signal. See your options below.
If you live in a really large home and need a wider area of coverage for your wireless network, then these combo modem routers might not be up to the task. The C7800 has a substantial built-in router with a signal of AC3200. This is going to be all you need for a 2 story home and even many 3 story homes. But once you go beyond that you need to start looking into either a wireless extender or a standalone modem and a separate router which we will cover next.
Modem Only, No Router
The modem alone without a router. You must pick a router from the router list below. You may pick based on the speed tier of Xfinity you have.
| Model | Download | Channels | Speed | Price |
|---|---|---|---|---|
| Netgear CM500 | 300 Mbps | 16×4 | Performance | Amazon |
| Netgear CM600 | 400 Mbps | 24×8 | Blast | Amazon |
| Motrolola MB8600 | 1 Gbps | 32×8 | Gigabit | Amazon |
| Netgear CM1150v | 2Gbps | 32×8 | Voice Package | Amazon |
- CM500: Best for any users with Comcast Performance.
- CM600: Best for any users with Comcast Blast.
- MB8600: The strongest modem, required for Xfinity Gigablast.
- CM1150v: Gigablast modem. Required for any voice package, no exceptions.
With these stand-alone cable modems, you have several options depending on what speed package you subscribe to. You will need to purchase a router separately from the 3rd chart but that is what makes the standalone modem a better choice. The ability to have full control over what router you combine with your modem. This ensures flexibility, power, speed, and ease of use.
If you’re looking for the actual best possible modem for Comcast, the number one choice is a MB8600 DOCSIS 3.1 modem. It is the only DOCSIS 3.1 modem approved for Comcast Gigabit speeds. This high-performance, new technology modem paired with a powerful router cannot be beaten by any combo modem router on the market. It truly is the top performer when it comes to the fastest internet speeds. Not only is it the best modem, but it is also required for Xfinity Gigablast Speeds.
When it comes to stand-alone cable modems, the best choice for you will be whatever one matches your download speeds. Yes, it’s that simple because the real power will come later with the wireless router you match it with. Of course, these are all certified, approved and compatible with the Comcast Cable Network. There is a list of bad modems out there to avoid.
These modems will work for years and years to come but if you want the best top of the line future-proofed modem, you have to get the DOCSIS 3.1 1Gbps MB8600. Otherwise, just pick the modem that works with your Comcast Xfinity Internet Speeds from the chart. More info on DOCSIS 3.1.
WiFi Routers To Use With Comcast
No matter what stand alone modem you buy, you can use any of these compatible routers. They are approved with all Comcast speed tiers from Performance to Blast, and Gigabit. You can buy based on your house size. This chart will help you choose.
| Model | Power | WiFi Range | House Size | Price |
|---|---|---|---|---|
| ASUS RT-ACRH13 | AC1300 | 1,000 sq ft | 1 story | Amazon |
| ASUS RT-AC86U | AC2900 | 2,000 sq ft | 2-3 stories | Amazon |
| ASUS RT-AC5300 | AC5300 | 5,000 sq ft | 3-4 stories | Amazon |
| Netgear Orbi Mesh | AC2200 | 6,000+ sq ft | 4+ stories | Amazon |
Note: Most people only need the 1-2 story router. If you live in a mansion, you will need to go Wireless Mesh.
What combination modem router should I get?
If you don’t plan on getting Gigabit, then the current best DOCSIS 3.0 modem choice would be the Netgear CM600. It can handle Comcast Blast and Performance internet up to 400 Mbps.
If you are going for the cheapest modem, the Netgear CM500 will work up to 200 Mbps. The truth is the CM500 will be the best choice for almost everyone. Most people never get anything over 200 Mbps.
Either modem paired with a WiFi router that matches your home size will be the best combination set up for Comcast subscribers.
Isn’t a combo modem router the best option?
We recommend two devices over the combo modem with wireless built-in. These are the reasons why.
Two devices are better. The stand-alone cable modem and any of the mentioned routers will have better performance than the single unit combo modem router. The higher cost for separate devices comes from better equipment.
2 separate units make 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.
Nerd options. The ASUS GUI gives you a lot more control. It is simple and intuitive for even the nonskilled. A great way to start learning networking from home.
The real reason, they are better routers. External antennas will get higher speeds at a distance. The combos won’t go beyond 2 stories.
Netgear vs Arris SB6190
You may have heard that the ARRIS SB6190 is a better modem. It is not. Stay away from the SB6190 or any modem on this bad modem list. We’re not even going to compare the two devices because when it comes down to Puma 6 vs Broadcom, there is no comparison.
End Of Life Modems – ARRIS SB6141? Netgear CM400?
Older 8×4 modems with only eight 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 do get added to an end of life list in 8 years, they would continue to work if the mac address is already on your internet account.
Benefits to buying your own replacement modem
- Save $10 a month forever, no more rental fee
- Sace $120 a year, forever.
- Disable Comcast’s “public hotspot” coming out of your Xfinity provided 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 18 years, meaning I have saved $2,160 dollars on my cable internet bill. Sure it may seem like a lot to pay for replacement equipment now, but I promise you it will pay for itself in the long run.
Improve your Comcast internet download speeds.
In most cases, people experience improved speeds when they buy a replacement retail modem and router. Reason being, these are the latest DOCSIS 3.0 and 3.1 modems, they have higher bonded channels than most Comcast provided modems, and the routers have higher rated wireless signals. 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 Xfinity cable internet service.
How do I install my cable modem?
You don’t have to do anything. This cable 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. They know this call very well and will not be giving you trouble. They will do it, and you’re finished. The mac address is on the bottom of the modem on a sticker, and it is clearly labeled. As long as you do not buy a used modem.
Check Out These Fastest Modem Speeds.
You can verify your cable internet modem speeds via the online speed test. Here are the download speed results from my self-bought replacement modem. 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 be stuck around 30Mbps even though I was paying for better speeds. Your results will vary based on your cable ISP, speed package, and location.
Notice how it says faster than 90% of the US?
This is because most people rent a modem and router.
Good luck, please feel free to ask questions below!
Sources:
Comcast Compatibility Checker, Xfinity
Approved Modems Only, Xfinity FAQ
Comcast Speeds, Price Plans
Hawk says
I am currently being notified by Comcast that my modem and router are not capable of delivering the speeds that they are providing. Soon, I am planning to switch from current Xfinity blast internet ( up to 250mbps) to Verizon Fioz 100mbps/100mbps, for a two-story 1800sqft house, what modem and router would you suggest?
StickyStatic says
I do not think a Comcast modem will be compatible with Verizon Fioz. As for router, check our the chart. The wireless will work with any modem on any ISP.
Stacey says
I currently have direct tv and fios modem but I am moving and keeping direct tv but now getting xfinity for internet only. The plan is for 60 mbps. Only two of us in the house mostly, both have smart phones,iPad. As for the TVs two smart tv but one has 4K. We use the fire stick only once in a while. Which modem is best for docsis 3.0? Also we only have a modem now with fios and xfinity also said only a modem is needed. They said nothing about requiring a router as well.
StickyStatic says
It’s a trap! You definitely need a router if you want a wireless network in your house. Those reps are often clueless as to what you’re asking so they just tell you whatever sounds easiest.
If your internet is only going to be 60mbps and you have a standard size living situation, any of the lowest options are more than fine for you. The lowest modem plus router or the lowest modem router in one combo.
Belkin user says
What is the best internet modem to buy for a Belkin router?
StickyStatic says
The answer for a Belkin specific router would be any cable internet modem. There is no special compatibility need for any exact router, specific model, or brand.
You should always buy your modem based on your cable internet needs, and then buy any wifi router based on your house size or other requirements.
Jennifer says
Great info. I am looking to get a gateway/combo and live in a small 900 sq ft condo so I think I will be fine. You seem to recommend Netgear. But everyone is telling not to get Netgear as they tend to break and the warranty is horrible. Even though there is a year warranty if you break it after 3 months, they require you to send it in to be diagnosed and it will cost you once $100 to do that. Thoughts? Have you seen this issue?
StickyStatic says
I have not seen people reporting issues of Netgears breaking. They are a long-standing router company. I use ASUS mostly now but have had many Netgear routers over the years.
Lori says
StickyStatic,
We are dropping Directv and switching to Comcast Triple Play. A whole new set of issues now…the modem. We do not want to rent theirs. Modem, voice, Router. Do I have to get them all in one, can I get just the modem and voice and get the router separate? I am reading Netgear is the best…We are not gamers.. we will have download speeds up to 250 Mbps.
StickyStatic says
See the entire page dedicated to voice modems. It explains everything in detail. You will make your choice or ask any further questions there.
Chris says
I just recently upgraded to Comcast’s Gigabit service. I noticed you have the Motorola MB8600 listed for that service but was curious how you compared it to the Arris SB8200 and Netgear CM1000? As far as a stand alone router to pair with it, I’m debating between the Motorola MR1900 and the Asus RT-AC68U. Emphasis more on wired gaming than anything, and I know the Asus is a bit dated but it seems to have stellar reviews even for people on gigabit services. Thank you for the blog and any help.
StickyStatic says
Funny you ask. Here’s the two modems going head to head in our comparison. MB8600 vs Sb8200. There are some interesting differences.
And yes, the ASUS AC1900 is still an excellent router, and if hardwired for gaming, you won’t have a worry in the world with other task like streaming on your TV. I had that router for a long time.
Chris says
Thank you for the reply. I ended up going with the MB8600 and the Asus AC1900 and am thoroughly satisfied with the hardwired performance and even the wifi for less-important devices around the house. I actually had the MR-1900 router AND the Asus at the same time to setup/test then return the “worse” performing of the two. I can only assume something in the settings I was missing for the MR-1900 as I was never able to get over 400mb on my Comcast gigabit line, even trying some recommended tweaks after searching online. Rather than torture myself I just hooked up the Asus AC1900, basic settings/wifi setup and right out of the gate 950mb down like clockwork. And the UI for the Asus (in my opinion) is VASTLY superior. It’s insane to me that it is 5+ years old. Again I’m sure it could have been user error on the MR-1900, but it’s very basic UI/options and trouble starting up out of the box earned it a 1-way trip back to the store. Thank you again for the very interesting reads/recommendations!
Chris says
Ended up going with the MB8600 and actually purchased the MR-1900 router AND the Asus AC-1900 to compare and return the “loser”. I tried the MR-1900 first, opting to try and stay with Motorola on the modem and router choices. It’s UI/options left a lot to be desired and after multiple shots at tweaking/researching, I could never get it to hold over 400mb/s down, even though hooking straight to the MB8600 modem I was consistently getting 900-930mb/s on my Comcast gigabit line. Instead of torturing myself, I opted to just hook up the Asus AC-1900 to check it out. Basic plug-n-play settings and setting up the wifi, it instantly was popping at 930-950mb/s, even consistently higher across the board than when straight-lined to the modem. Not sure if that’s just dumb luck or it actually handling the traffic better than Modem-to-PC. The UI/options are insane, and the performance as well (including wi-fi range/strength) for a device 5+ years old. EXTREMELY pleased with your recommendation and while I’m sure the MR-1900 could have been something on my end that I wasn’t aware to alter, it earned a 1-way trip back to the store. Thank you again for the information and guides!
StickyStatic says
Excellent! Thanks for the follow up. You made the right choice and thanks for testing out the MR-1900 for us. ASUS has been consistently solid when it comes to wireless and no matter how long I own a router yet I have still upgraded just to test new ones out.
Leslie says
There are 6 people in our family. Lots of online gaming and streaming on Netflix, Hulu, & such. Our home is 2 stories & roughly 1500 ft2. We have Comcast Xfinity for internet & have the Gigabit download speeds package. I want to purchase a modem & a router. I want good quality, but don’t want to break the bank. I’ve been researching & reading up on multiple options, but really don’t know what is best for us. Can you help?
StickyStatic says
You are forced to get a DOCSIS 3.1 modem with Gigabit speeds and router wise, you would need a higher end Wireless AC 3100 or above. So you will be breaking the bank, but it’s the price of high usage streaming and gaming for a 6 person household. The good thing is you won’t be renting from Comcast anymore and you will have reliable service for all users.
Jess says
Trying to cut the cord, but need the web of course. My home is 2800sqft approx, and two stories. The problem is my access point is in the far corner of the home from the TV in my room and my son’s room. We just use streaming, and he needs to update the game console from time to time. However we don’t online game as he’s too young for that. I also use a wireless network for my home office with light use. Just shoot me straight up what I should get. I’m coachable and can set anything up with directions. I just don’t quite know the ins and outs on the strength of signal side. I’ve tried repeaters and have found they have limited effects due to the primary access point into the home being sort of offset from the main structure. Thanks so much. Great read. I also love the idea that they aren’t going to weaken my signal by piggybacking my home network as a hotspot.
StickyStatic says
Since it sounds like you already tried the repeater access point plan(not ideal), you may be forced to go with Wireless Mesh as mentioned in the router suggestions. Check it out, there is a whole article there. Yes it cost more, but it works. I had to help my mom with this for her home security system. Repeaters do not cut it.
Michael Harvey says
To lower our monthly expenses, we just dropped my phone service and decided to buy our own modem and router. Home is about 1700 square feet, and we decided on 100 mbps service. We don’t often run multiple devices, and we aren’t gamers. Do you have a suggestion for modem and router combination? Any drawbacks to purchasing on the internet, or would it be better to go to a local retailer like Best Buy in case something doesn’t work right?
StickyStatic says
With the 100Mbps you can use the CM500 and depending on router location and floor plan, the AC1750 would likely work. Of course centrally located will be better than far off on one side of the house.
Dennis Coburn says
I currently use Comcast (or they use me!) and have their 150 mbs internet connection with TV and phone. Before adding the phone I was using an Arris SB6183 Surf Board cable modem and a TP-Link AC1750 wired router with Wi-Fi. When I added the phone function Comcast installed an addition modem for the phone connection which also has dual freq. Wi-Fi and Xfinity Hot Spot (Which I have disabled, I think). Of course, they are charging me a monthly rental fee for this unit. I also have a second TV with one of their very old boxes for which I’m paying $5.99/ month “extra TV fee”.
I’d really like to get rid of these monthly fees, or at very least, the phone modem fee.
I’ve tried to find the best and least expensive item(s) to purchase for this, without much success. Could you possibly suggest a good configuration?
Thanks for your help,
Dennis
StickyStatic says
The very unfortunate thing with the phone modem is that you can no longer use a regular cable modem. But you can sell it to recover losses. Just make sure you have Comcast “remove it from your account” first so whoever buys it does not have a problem. But the good news is that you already have your own wifi router so you only have to buy a stand alone voice modem. It is all explained on the voice modem link above but the CM500v is the stand alone option.
Aaron says
Thank you so much for the insightful information!
I have been subscribed to Comcast Xfinity for a long time now, and have recently upgraded to the Gigabyte internet tier. I have been renting the default gateway, and am ready to move onto my own, but am limited due to the Xfinity voice requirements. What would be the best gateway options that accommodate the voice input and supports 1gb down?
StickyStatic says
I must ask, what gateway do they rent to you?
There currently are no DOCSIS 3.1 voice gateways available on the market for gigabit speeds. Only non DOCSIS 3.0 voice modems that Comcast has not approved for 1GB.
Cheryl says
I really enjoyed reading your article and I am understanding better about the modem and router. I currently subscribe to Xfinity Triple play with the Blast package. I need to upgrade my equipment. My current modem is ancient SB6120, I believe and my router is Linksys Wireless 2.4 GHz. I also have a voice modem in the basement from Comcast. I own my router and internet modem. I would like to know what would be the best modem and router for me to upgrade to? Can I also buy the voice modem to replace the one from Comcast? I would like to purchase something that would not have to be replaced in a few years. I lived in a split level home not very big.
StickyStatic says
Yes, the Netgear combo voice modem would replace the one they supply and not need replacing anytime soon. It is dual band 2.4Ghz and 5Ghz.
Michelle says
Great article! We do have xFinity Triple Play (voice) with Extreme. You mention those are forced to use an EMTA modem, but possibly didn’t provide options? We’re sick of Comcast’s ultra unreliable gateway and poor speeds. Xbox (hardwired) 4KHD spoiled and WiFi gamers at heart. Urban mid-large house. Looking for a compatible AI1 or dual devices. Pre-thanks!
Reread and found the link for C7100V 24×8 DOCSIS 3.0 Cable Modem Router (w/ Voice) link. If this is the only option, so be it. Thank you again.
Dave says
Have upgraded Comcast modem today. Now realize have to upgrade old Linksys router. Suggestions for WIRED router compatible with Comcast and can handle 250+ speeds? Thanks.
StickyStatic says
Wired with no wireless at all? I mean you can get anything really. Whatever brand interface you prefer. You will surely save a lot of money that way.
randy says
What is the best modem/router combo to use with Comcast for streaming with fire stick?
StickyStatic says
The best one is listed above. Nighthawk DOCSIS 3.1 combo modem router. However the cheaper DOCSIS 3.0 Nighthawk listed will work fine for a Fire Stick or Chromecast.
Susan Brell says
I own my own modem and router and subscribe to Xfinity Blast. My current modem is a NetgearCMD31T and my router is a Netgear Nighthawk AC1900. Do I need to upgrade my router in order to maximize my speeds and power or do I just need to upgrade my modem. I was thinking of the Netgear CM1000 but after reading your article I ‘m thinking the SB6190 or even the Motorola. I am not a gamer but want a powerful network to reach outside of my home. We do use streaming video. I’d like to stay ahead of the curve would appreciate your advice. Thanks.
StickyStatic says
The CM1000 is a DOCSIS 3.1 modem so it is better for staying ahead of the curve because it is on top. The SB6190 is only DOCSIS 3.0. Sticking with Motorola though, the step up from the SB6190 is the SB8600. It is a DOCSIS 3.1 modem ready for next gen speeds. It is also usually a few dollars cheaper.
These will not change your wireless signal though. The Nighthawk AC1900 is a good lower end AC router and will do for most people but when it comes to reaching outside you often need a more powerful router like the AC3200 or higher or in many cases a wireless mesh system like the Orbi.
Jen says
My house is about 1500 square feet. I’m looking to purchase a router and modem so I can stop paying rent. I’m the only one living here but occasionally I have people over. I do have a fire stick that I do use. I’m assuming I need both router and modem. What would you recommend?
Troy says
I live in a rural area and have good internet speed, but not great. I am looking for a good modem and router for my needs. I am not a gamer but only a net surfer, we do have the Comcast HD Package and a 4K TV if that makes any difference? I would like to find good devices that are reasonably priced, any options would be appreciated.
StickyStatic says
It is going to depend on where your router is in relation to your 4k TV and how big your house is. I personally hardwire my TV and XBOX because even the highest strength router can have problems in my busy apartment complex situation. But if you are in a rural area without interference, the cheap Netgear budget modem and the ASUS AC2400 above or even the AC1900(especially if you can hardwire the 4k devices) will do just perfect for browsing all over the house.
Ray Enny says
I recently installed a Netgear Nighthawk combo and everything worked fine with the exception of the X1 wireless boxes that Comcast conveniently did not tell me when I called to find out if it was compatible. Is there a combo that can accommodate the X1 wireless box?
StickyStatic says
To my understanding, the Comcast Xfinity X1 Boxes do not use the wireless at all. They obtain their signal from the coax cable just like the cable modem does. If this is true, I’m not sure what is going on here.
Jaime Rueda says
Hi, thank you for the wonderful information! I have a Netgear N300 combo modem router, and I have xfinity’s performance pro speeds. When wired up, I get over 100Mbsp, but wireless I only get anywhere between 0-30. To get better speeds wirelessly while still using the Netgear N300, can I pair it up with the ASUS AC2400? or would I need to also get the faster modem to get higher speeds wirelessly? Ideally, I would like to keep the Netgear N300 combo, use it as a modem only, and add a better router, but I don’t even know if it’s possible to pair up a router with a combo modem/router. Thank you for your help.
StickyStatic says
Yes, you can indeed do that and some have. You would put the old wireless N router in “bridge mode”, bypassing its router function and passing the direct signal on to the new AC router. But you will still be paying $10 a month to Comcast in rental fees for the old router. A nice replacement modem will remove that fee and pay for itself in less than a year.
Jaime Rueda says
Hi StickyStatic,
I got the new ASUS AC2400, and that worked perfectly with my Netgear in bridge mode. I ended up replacing my Netgear with the SB6183 and I’m now getting 120+Mbsp everywhere in my apartment.
Thank you so so much for this article.