This list of XFINITY Compatible Modems is reviewed and continuously updated. You will also find below the best cable modem for XFINITY by type. These are not just the best in our opinion. They are highly recommended by other experts in our field. We’ve coupled this data with true ratings and reviews for real customers who have used these new modems exclusively with XFINITY Internet.
Selecting a New XFINITY Modem
Before selecting a new cable modem for XFINITY, you should be aware of this important info. All DOCSIS 3.1 modems for sale now are backward compatible with DOCSIS 3.0 with 32×8 channel bonding. Additionally, all modems built with the faulty Intel Puma 6 Chipset are not listed here for your convenience. All 8×4 modems have also been eliminated as they are at or near end-of-life.
We have also omitted all XFINITY modems with the outdated wireless N technology. With those removed, we now only have AC & AX, with AX being the latest release. Also, note that the numeric digits following the AC or AX in the wireless column are the speed of the wireless transmission. For example, AC3200 would be a wireless AC modem that has a wireless speed of 3200 Mbps / 3.2 Gbps.
Standard XFINITY Modems (No WiFi)
A stand-alone cable modem receives the cable Internet signal from your provider. From there, the signal can be sent via an Ethernet cable to ONE device. That can either be a PC or a game system. Additionally, a router can be connected to add more wired ports and wireless signals to multiple devices.
Best Cable Modem For XFINITY – ARRIS Surfboard SB6183-RB
The ARRIS SB6183 is the best-selling cable modem for XFINITY customers. Reason 1, it is capable of 300 Mbps & lower speeds, which 82% of customers subscribe to. Secondly, ARRIS is the #1 manufacturer of cable modems. The SB6183 has 16×4 channel bonding making it a DOCSIS 3.0 modem.
After testing and reviewing the SB6183 on our Comcast XFINITY 400 Mbps plan, we can say we are happy with this cable modem.
Standard XFINITY Compatible Modems List
|Brand / MPN||DOCSIS 3.0||DOCSIS 3.1||Top Speed (Mbps)||08/26/21|
DOCSIS 3.1 Modems For XFINITY
All XFINITY DOCSIS 3.1 modems are backward compatible with DOCSIS 3.0 with 32×8 channel bonding. Modems with WiFi are listed with the wireless type (AC or AX) followed by the wireless speed. For example, the SBG8300 has wireless AC that operates at 2350 Mbps. Wireless AC is a.k.a WiFi-5. Wireless AC is a.k.a WiFi-6, making it the latest wireless technology available.
Best DOCSIS 3.1 XFINITY Cable Modem – ARRIS SURFboard SB8200
From the ARRIS SURFboard list comes the first DOCSIS 3.1 cable modem, the ARRIS SB8200. If you subscribe to Gigabit services from Comcast XFINITY, then this may be the modem you need.
Comcast DOCSIS 3.1 Modems List
|Brand / MPN||Voice||WiFi||Top XFINITY Speed
|ARRIS SURFboard S33||No||No||1200||$199.99|
|ARRIS SURFboard SBG8300||No||AC2350||800||$296.98|
|ARRIS SURFboard T25||Yes||No||800||$199.00|
|NETGEAR CAX30 / CAX30S||No||AX2700||800||$312.18|
|ARRIS G34 / G36||No||Not Yet Known||1200||Not Yet Known|
XFINITY Gateway / Modem & Router
XFINITY gateways are more commonly referred to as modem and router combos. With a WiFi modem, the router is build-in and offers an all-in-one unit. It typically has four wired Ethernet ports and can support multiple wireless devices in the home. These are more expensive because you don’t have to buy a separate router.
Best Comcast WiFi Modem – NETGEAR Nighthawk WiFi 6 Cable Modem Router
Built for the fastest speeds available today, the CAX30S is ready to take your home network to the next level. It features the latest in wireless technology, WiFi 6. The CAX30S is DOCSIS 3.1 ready as well and comes with one free year of NETGEAR Armor.
Comcast XFINITY Compatible Modem Routers List
|Brand / MPN||Wireless Type||DOCSIS 3.1||Voice||DOCSIS 3.0||Top Speed
|TP-Link Archer CR500||AC1200||No||No||16×4||300||N/A|
|TP-Link Archer CR700||AC1750||No||No||16×4||300||$95.99|
XFINITY Voice Modems (eMTA)
As with the aforementioned modems, a telephony modem can have a built-in router or be used with a separate router. Only some cable companies allow the use of third-party eMTA modems, so be sure to check on your provider’s page here. This law doesn’t apply to the FCC regulations due to the sophistication of the modems for XFINITY and how they are set up by each provider. Looking at the back of this modem you will see two telephone ports at the top. Below that, you see one yellow ethernet port which is used to connect to a single device such as a router or TV.
Best Comcast Voice Modem – Motorola MT7711
The Motorola MT7711 is the best-rated voice modem for Comcast customers. It is perfect for any speed tier up to and including 600 Mbps. This would also include Extreme, Extreme Pro, Blast, and other Internet tiers.
Comcast Voice Modem List
|Brand / MPN||WiFi||DOCSIS 3.0||DOCSIS 3.1||Top Speed||08/26/21|
|ARRIS SBV2402||No||24×8||No||600 Mbps||$79.99|
|ARRIS SVG2482AC||AC1750||24×8||No||600 Mbps||$168.25|
|ARRIS T25||No||32×8||Yes||800 Mbps||$190.02|
|Motorola MT7711||AC1900||24×8||No||600 Mbps||$186.99|
|NETGEAR C7100V||AC1900||24×8||No||600 Mbps||$249.99|
|NETGEAR CM500V||No||16×4||No||300 Mbps||$69.95|
|NETGEAR CM1150V||No||32×8||Yes||800 Mbps||$249.99|
|NETGEAR CM2050V||No||32×8||Yes||1.2 Gbps||$242.97|
Comcast Internet Speeds vs Modem Requirements
- Performance Starter (25 Mbps) & Performance (100 Mbps) – Require a modem with at least 8×4 channel bonding
- Blast! (200 Mbps) & Extreme (300 Mbps) – The compatible modem must be at least a 16×4 modem
- Extreme Pro (600 Mbps) – Must use at least a 24×8 bonded modem
- XFINITY Gig & Gigabit Pro – Must use a DOCSIS 3.1 modem
XFINITY Assistance, Support & Resources
Need help finding something on Comcast? View our XFINITY assistance and resource list below to get help from Comcast. Get assistance with your account, see the current outage map, get support, and more. Also, find deals on Comcast Internet with the link below. Return to the top to see all XFINITY compatible modems.
Now is the time to sign up for the Emergency Broadband Benefit with Comcast. Even if you’re already a subscriber, you can get up to $50 off your monthly bill. Benefit amounts are based on household sizer and income. View more information on Emergency Broadband Benefit.
- Activate A New Modem For XFINITY
- Find a Store Near Me
- XFINITY Assistance & Customer Service Phone Number: 1-800-934-6489
- Comcast Outage Map
- Prepaid Internet Prepay and never worry about another bill from Comcast
- Internet Essentials Internet For Low-Income Households
- Internet Plans
- Flex 4K Streaming Box Flex Streaming Device. Enjoy Peacock, Amazon Prime, Netflix, Hulu, Disney +, and so much more with the new flexbox.
- Comcast / XFINITY – XFINITY Supported Devices
- ARRIS SURFboard XFINITY Voice Modems – Kick your network into high gear with modems optimized for use with Xfinity Internet and Voice Service.
- NETGEAR WiFi Cable Modems: Two-in-one modem routers optimize internet speeds and WiFi performance while helping you save on equipment rental fees.
For XFINITY Service – Call 1-800-XFINITY or try The XFINITY Assistant