30 Best Comcast Xfinity Compatible Modems in 2020

Are you a Comcast Xfinity subscriber who wants to get off the monthly equipment rental? It doesn’t matter whether you are on their fastest service plan or on slow speed plans, as our list includes the best-rated modems that are highly compatible.

The equipment rental might seem like a small amount BUT it is not!

Cable internet providers in the US charge anywhere between $15-25/month in the name of equipment rental. The modem rental you pay for 12 months can actually land a decent modem and use it without trouble for at least 4-5 years (unless you upgrade to a different plan/ISP.)

It’s not just Xfinity that charges you a hefty amount for renting a modem and router, but almost all the cable providers in the United States charge you a similar amount for renting equipment. And since, it can be avoided by purchasing a reliable modem, why not do it?

The equipment rental contributes to 15-20% of the revenue which is significant, that’s why your cable provider wouldn’t want you to purchase a modem/router. But since they can’t stop you directly, they do it by asking users to use the modems that are certified by them (although they have published their list on their websites.)

Contents

Best Comcast XFINITY Compatible Modems

These certified lists are quite long and are a bit confusing to most of the users. In my research, I found out that many people found modems on those lists, they were compatible with Comcast Xfinity as well. However, they didn’t provide adequate speeds according to the plan (although many modems are bad, but this can happen if you end up picking a modem that’s not suitable for your service package.)

1. ARRIS SURFboard SBG10

  • Compatible with major U S Cable Internet Providers including Cox, Spectrum, Xfinity & others
  • Cable internet service required
  • Wi-Fi 5 AC1600 dual-band concurrent Wi-Fi Router with 2 Gigabit Ethernet ports
  • 16 downstream & 4 upstream channels
  • Not compatible with ATT, Verizon, CenturyLink or other DSL or Fiber internet providers
  • Best for cable internet service plans up to 400 Mbps.
  • 3 products in 1: DOCSIS 3 0 Cable Modem, AC1600 dual-band Wi-Fi Router, 2 Port Gigabit Ethernet Router (cable digital voice service not supported)
  • Setup and manage your network with the SURFboard Manager app

2. NETGEAR Cable Modem CM700 – Compatible with all Cable Providers including Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 500 Mbps | DOCSIS 3.0 -Modem Router Combos

  • NOT compatible with Verizon, AT&T, CenturyLink, DSL providers, DirecTV, DISH and any bundled voice service.
  • Works with any wifi router: Connect any WiFi router to this modem’s ethernet port to support all your wireless devices.
  • Ethernet connections: 1 Gigabit Ethernet port connects to your computer or separate WiFi router.
  • Compatible with all major cable internet providers: Including certification by Xfinity by Comcast, COX, and Spectrum
  • Built for super-fast speed: best for cable provider plans up to 500 mbps speed.
  • Modem technology: Engineered with 32×8 channel bonding and DOCSIS 3.0.
  • Save monthly rental fees: Model CM700 replaces your cable modem saving you up to $168/yr in equipment rental fees.

3. MOTOROLA MB7420, 686 Mbps DOCSIS 3.0, Certified by Comcast XFINITY, Charter Spectrum, Time Warner Cable, Cox, BrightHouse, and More -Modem Router Combos

  • A two-year warranty plus rugged lightning and power surge circuits protect your investment.
  • Experienced USA-based customer support specialists are there to help if you need them.
  • Setup is fast and easy with a few quick steps set out in a Quick Start guide
  • This 16×4 DOCSIS 3.0 cable modem provides speeds up to 686 Mbps, sixteen times faster than DOCSIS 2.0
  • Attractive, compact design minimizes shelf space, improves cooling, and extends product life while looking great in any home or office
  • Cable modem’s Ethernet port connects to a computer, HDTV, game station, or wireless router
  • Requires cable Internet service
  • A Full-Band Capture digital tuner ensures a faster, more reliable Internet.
  • The Motorola MG7310, MG7315, MG7540 and MG7550 have a built-in wireless router.)
  • (This Model MB7420 cable modem does NOT have a built-in wireless router and does NOT have a telephone adapter or phone jack
  • Certified by Comcast XFINITY for residential speeds up to Extreme 300, by Comcast Business for speeds up to Deluxe 250, Time Warner Cable, Cox, Charter Spectrum, BrightHouse, and other leading cable service providers for modem ownership programs that typically save rental charges of $120 or more per year

4. Motorola MB7621 (24×8), DOCSIS 3.0.

  • This cable modem’s one Gigabit Ethernet port connects to a WiFi router, computer, HDTV, game station, or streaming video device
  • Wirecutter rates this “the best modem for most people.” A Full-Band Capture Digital Tuner ensures faster, more reliable Internet.
  • ELIMINATE CABLE MODEM RENTAL FEES UP TO 156 DOLLARS PER YEAR.(Savings are shown for Xfinity and vary by cable service provider
  • (This cable modem does not have a built-in wireless router or telephone call capability
  • Attractive, compact design minimizes shelf space, improves cooling, and extends product life while looking great in any home or office
  • The Motorola MG7315, MG7540, MG7550, and MG7700 have a built-in wireless router.)
  • Experienced USA-based Motorola customer support specialists are happy to help if you need them
  • Includes phone and web support by friendly, professional USA-based technical support specialists.
  • Setup is fast and easy using the Quick Start guide
  • A two-year warranty plus rugged lightning and power surge circuits protect your investment
  • Model MB7621 has no phone jack.)
  • Support is in English or Spanish.
  • Great for use with Whole Home WiFi or Mesh networks like eero, Google WiFi, and Orbi
  • No cable modem is compatible with fiber optic, DSL, or satellite services from Verizon, AT&T, CenturyLink, Frontier, and others
  • Requires cable Internet service.Approved by and for use with Comcast Xfinity and Xfinity X1, Cox, Charter Spectrum, Time Warner Cable, BrightHouse, CableOne, SuddenLink, RCN, and other cable service providers
  • Model MB7621 is recommended for actual cable Internet service speeds up to 650 Mbps

5. Motorola MB8600 DOCSIS 3.1 Cable Modem (Best for Gigabit)

  • WORKS WITH ANY WiFi ROUTER YOU LIKE – including Whole Home WiFi or Mesh routers like eero, Google WiFi, and Orbi
  • A BROADCOM CHIPSET PROVIDES SECURITY FROM DENIAL OF SERVICE ATTACKS – a 10/100/1000 Gigabit Ethernet port allows connection of any SINGLE device with an Ethernet port including a router, Windows or Mac computer, HDTV, or game station.
  • No cable modem is compatible with fiber optic, DSL, or satellite services, available from Verizon, AT&T, CenturyLink, Frontier, and others.)
  • Not compatible with RCN
  • (Savings are shown for Comcast Xfinity and vary by cable service provider.) Approved by Comcast Xfinity and Xfinity X1, Cox, and CableOne for all speeds including Comcast Gigabit services and Cox Gigablast
  • ELIMINATE UP TO 156 DOLLARS PER YEAR IN CABLE MODEM RENTAL FEES
  • AQM results in faster page loads for all Web traffic and greatly enhances interactive applications like online gaming and video conferencing
  • Built-in DOCSIS 3.1 and DOCSIS 3.0 32×8 capabilities give top Internet speeds for all cable Internet services, from the slowest to the fastest.
  • The MB8600 also includes a full-band capture digital tuner to enhance speed and save energy.
  • ACTIVE QUEUE MANAGEMENT (AQM) SIGNIFICANTLY REDUCES INTERNET LATENCY – on both DOCSIS 3.1 and 3.0 services
  • This cable modem does NOT have a built-in wireless router or telephone call capability.
  • TOP INTERNET SPEEDS FOR ALL CABLE INTERNET SERVICES – Wirecutter recommends this as the best cable modem for people using Gigabit Internet plans

6. ARRIS SURFboard SB8200 DOCSIS 3.1 Gigabit Cable Modem, Approved for Cox, Xfinity, Spectrum & others -Modem Router Combos

  • Comcast Xfinity and Cox Cable APPROVED! Spectrum (Charter, Time Warner and Brighthouse) and others pending approval.
  • Not compatible with: Verizon, AT&T, or CenturyLink
  • Cable Modem only (no WiFi router)
  • BEST for 300 Mbps Internet plans and above! Perfect for streaming 4K HD video and online gaming.Up to 10+ Gbps DOCSIS 3.1 Download Speeds
  • Backward compatible with DOCSIS 3.0.
  • (Note, Cox Cable does not support activation of 2nd Ethernet port)
  • No Telephone Port
  • 32 DOWNLOAD and 8 UPLOAD Channels
  • Not compatible with bundled voice services
  • Gigabit Ethernet ports
  • DOCSIS 3.1 cable modem, the newest technology being offered by Cable Internet Providers
  • Supports IPv4 and IPv6 Internet browsing standards
  • Compatible with major U.S cable providers
  • Create 2 Home Networks, both capable of gigabit speeds

7. Motorola MG7700 24×8 Cable Modem Plus AC1900 Dual Band WiFi Gigabit Router with Power Boost, 1000 Mbps

  • Four 10/100/1000 Gigabit Ethernet LAN ports provide wired connections to Windows and Mac computers and other Ethernet-capable devices
  • Fast 24×8 DOCSIS 3.0 cable Modem Plus a built-in AC1900 Dual band (2.4GHz and 5GHz) Wi-Fi Gigabit Router with four Gigabit (GigE) Ethernet ports, power boost Wi-Fi amplifiers, firewall security, and more
  • A two-year warranty is the longest in the the industry
  • The maximum modem speed is 1000 Mbps, supporting service speeds up to 650.
  • The vertical design looks great in any home or office
  • Built-in high-speed router with AC1900 wireless and Power boost – Provides internet access for Wi-Fi devices including smartphones, notebooks, tablets, and more
  • Rugged Lightning and Power Surge circuits further protect your investment.
  • A Broadcom cable Modem Chipset provides security from denial of service attacks.
  • Minimize shelf space and improve cooling – integrating the cable Modem and router creates a reliable connection that reduces unwieldy wiring and power adapter clutter while conserving desk space
  • In addition, anybeam Performing at both 2.4 GHz and 5 GHz frequencies focuses the signal on wireless clients to further enhance performance and range
  • (Savings are shown for Comcast Xfinity and vary by cable service provider.) certified by all leading cable service providers including Comcast Xfinity, Cox, Charter spectrum (no cable Modem is compatible with fiber optic, DSL, or satellite services, available from Verizon, AT&T, CenturyLink, Frontier, and others.)
  • Eliminate up to $156 per year in cable Modem rental fees
  • Wireless power boost for better speed and range – adds high-performance Wi-Fi power amplifiers to boost the wireless signals to the legal limit, giving a significant Boost in speed and range

8. Best For Telephone Connectivity: Motorola MT7711 24X8 Cable Modem/Router with Two Phone

  • NOT included is a backup battery option (Model 98250) that allows your phone to make calls for 8 hours on standby after power loss.
  • A Broadcom cable modem chipset provides security from Denial of Service attacks.
  • 4GHz and 5GHz) Gigabit Router, four Gigabit (GigE) Ethernet ports, and two XFINITY Voice compatible phone ports
  • WIRELESS POWER BOOST FOR BETTER SPEED AND RANGE – adds high-performance WiFi power amplifiers to boost the wireless signals to the legal limit, giving a significant boost in speed and range
  • REQUIRES COMCAST XFINITY INTERNET SERVICE
  • Approved by and for use with Comcast Xfinity and Xfinity X1
  • THREE-IN-ONE CABLE MODEM, AC1900 ROUTER, AND XFINITY COMPATIBLE VOICE PORTS – Includes 24X8 DOCSIS 3
  • This product is approved by Comcast for Xfinity Internet and Voice, and recommended by Comcast for XFINITY Internet service speeds up to 400 Mbps.
  • 0 cable modem, AC1900 Dual Band (2
  • Four 10/100/1000 Gigabit Ethernet LAN ports provide wired connections to Windows and Mac computers and other Ethernet-capable devices
  • 4 GHz and 5 GHz frequencies focuses the signal on wireless clients to further enhance performance and range
  • ELIMINATE UP TO $156 IN CABLE MODEM RENTAL FEES PER YEAR – Say goodbye to monthly rental fees and landline phone costs.
  • This product will not work with any other Internet service provider.
  • In addition, AnyBeam beamforming at both 2
  • BUILT-IN HIGH-SPEED ROUTER WITH AC1900 WIRELESS AND POWER BOOST – provides Internet access for WiFi devices including smartphones, notebooks, tablets, and more

9. MOTOROLA MG7540

  • Four 10/100/1000 Gigabit Ethernet LAN ports provide wired connections to Windows and Mac computers, HDTVs, game stations, streaming TV devices, and other Ethernet-capable devices.
  • Phone support is provided in English and Spanish.
  • A Broadcom cable modem chipset provides security from Denial of Service attacks.
  • The router can work on WiFi DFS frequencies, unlike most routers, so it is much less vulnerable to WiFi interference from neighbors
  • Includes phone and web support by friendly, professional USA-based technical support specialists
  • 16×4 DOCSIS 3.0 cable modem plus a built-in AC1600 Dual Band (2.4 GHz and 5 GHz) WiFi Gigabit Router with four Gigabit (GigE) Ethernet ports, a firewall, and more
  • Requires cable Internet service
  • Built-in high-speed WiFi router with AC1600 Wi-Fi provides Internet access for WiFi devices including smartphones, notebooks, tablets, game stations, HDTVs, Amazon Echo, Google Home, Chromecast, Roku, Amazon Fire TV, and AppleTV
  • AnyBeam beamforming at both 2.4 GHz and 5 GHz frequencies focuses the signal on wireless clients to further enhance performance and range.
  • Model MG7540 DOES NOT have a phone jack
  • ELIMINATE CABLE MODEM RENTAL FEES UP TO 156 DOLLARS PER YEAR
  • Integrating the cable modem and router creates a reliable connection that reduces unwieldy wiring and power adapter clutter while conserving desk space
  • NOT COMPATIBLE with Verizon, AT&T, CenturyLink and other fiber optic, DSL or satellite services
  • This model CANNOT be used for making or receiving telephone calls.
  • This product is recommended for actual cable Internet service speeds up to 375 Mbps
  • A two-year warranty plus rugged lightning and power surge circuits protect your investment
  • Approved by Comcast Xfinity and Xfinity X1, Cox, Charter Spectrum, BrightHouse, WOW!, CableOne, RCN, Mediacom and other cable service providers
  • (Savings are shown for Xfinity and vary by provider)
  • The vertical design minimizes shelf space and improves cooling while looking great in any home or office

10. NETGEAR CM500-1AZNAS (16×4) DOCSIS 3.0 Cable Modem

  • Ideal for streaming HD videos, faster downloads, and high-speed online gaming
  • Support Cable internet service plans up to 200 Mbps
  • Separate router required for Wi-Fi 16×4 channel bonding
  • 0 up to 16x faster download speeds than DOCSIS 2
  • Eliminate monthly cable Modem rental fees – up to 156 USD per year
  • System Requirements- Microsoft Windows 7, 8, 10, Vista, XP, 2000, Mac OS, or other operating systems running a TCP/IP network
  • Microsoft Internet Explorer 5.0, Firefox 2.0, Safari 1.4, or Google Chrome 11.0 browsers or higher
  • Number of Ethernet ports: one (1) Gigabit Ethernet port with auto-sensing technology
  • Not compatible with bundled voice services
  • “The best cable Modem” – the wire cutter
  • Docsis 3
  • Compatible with Infinity from Comcast, spectrum, Cox, Cable one & more
  • Not compatible with: Verizon, AT&T, or CenturyLink

11. NETGEAR CM600

  • Support Cable Internet Service plans up to 300Mbps
  • Separate router required for WiFi
  • Ideal for streaming 4K UHD content, fastest downloads, and high-speed online gaming
  • Requires Cable Internet Service
  • 24×8 channel bonding
  • DOCSIS 3.0 unleashes 8x faster download speeds than DOCSIS 2.0
  • Recommended for all speed tiers up to 500 Mbps
  • Cable Modem only (no WiFi router).Memory: 8 MB NOR flash and 128 MB RAM
  • Not compatible with: Verizon, AT&T, or CenturyLink
  • Compatible with Comcast Xfinity, Time Warner Cable, Charter, Cox, Cablevision, and more
  • DOCSIS 3.0 Cable Modem with 1 Gigabit Ethernet port

12. Arris SURFboard (16×4) Docsis 3.0 Cable Modem Plus AC1900 Dual Band Wi-Fi Router, Certified for Xfinity, Spectrum, Cox & More (SBG6950AC2),Black -Modems

  • Wi-Fi 5 AC1900 dual-band concurrent Wi-Fi Router with 4 Gigabit Ethernet ports
  • Best for cable internet speed plans up to 400 Mbps.
  • Cable internet service required
  • Setup and manage your network with the SURFboard Manager app
  • 3 products in 1: DOCSIS 3.0 Cable Modem, AC1900 dual-band Wi-Fi Router, 4 Port Gigabit Ethernet Router (cable digital voice service not supported)
  • Compatible with major U.S
  • 16 downstream & 4 upstream DOCSIS 3.0 bonded channels
  • Not compatible with ATT, Verizon, CenturyLink or other DSL or Fiber internet providers
  • Cable Internet Providers including Cox, Spectrum, Xfinity & others

13. ARRIS Surfboard SBV2402

  • 1 Gigabit Ethernet port for connection to a Wi-Fi router or other wired device
  • DOCSIS 3.0 cable modem with 24 downstream x 8 upstream channels, best for Xfinity cable internet speed plans up to 600 Mbps
  • Does not include Wi-Fi
  • Xfinity internet service required
  • Certified to work with Xfinity internet & voice service Not certified for use with other cable internet service providers
  • 2 telephone ports for Xfinity digital voice service

14. NETGEAR Cable Modem CM400

  • Up to 340Mbps download and upload speed
  • Memory storage capacity: 64.0 MB
  • Separate router required for WiFi
  • ELIMINATE MONTHLY CABLE MODEM RENTAL FEES – Up to $156 per year
  • Required for the fastest cable Internet speed tiers
  • Ideal for streaming HD videos, faster downloads, and high-speed online gaming
  • One (1) Gigabit Ethernet port with auto-sensing technology
  • 0 unleashes 8x faster download speeds than DOCSIS 2
  • DOCSIS 3
  • 0 Cable Modem with 1 Gigabit Ethernet port
  • 8×4 channel bonding.
  • DOCSIS 3
  • Not compatible with bundled voice services.
  • Compatible with Xfinity from Comcast, Spectrum, Cox, & more

15. TP-Link 16×4 AC1750

  • Eliminate rental fee: eliminate your cable Modem monthly rental fee – up to $120 per year
  • 4GHz (up to 450Mbps) and 5GHz (up to 1300Mbps) bands; Channel bonding of up to 16 downstream and 4 upstream channels, up to 680Mbps download speeds
  • Increased Wi-Fi range: six internal antennas and high-powered amplifiers Boost signal strength and reduce interference
  • Faster speed: up to 1750Mbps Wi-Fi speeds with simultaneous 2
  • Power Ranked TP-LINK “highest in customer satisfaction for wireless routers in 2017″;great for cable internet plans up to 300Mbps with Infinity from Comcast, spectrum (including Charter, time Warner Cable, and bright house networks), Cox, Sudden link, Mediacom, and wow
  • Cable Modem router: item is cable Modem router and this will serve as both your cable Modem and Wi-Fi router
  • Industry leading support: 2-year warranty and free 24/7 technical support; J

16. ARRIS Surfboard SB6183-RB 16×4 DOCSIS 3.0 Cable Modem, (Renewed)-White -Modems

  • APPROVED with Comcast Xfinity, Spectrum (Charter, Time Warner, Brighthouse), Cox and more
  • NO support for Cable TELCO options
  • If not sure call your cable provider to find out if approved to use
  • Great for streaming HD Video and gaming on multiple devices at a time
  • Cable Modem only (no WiFi router)
  • 90 Day Warranty
  • Approved for plans up to 300Mbps
  • REQUIRES Cable Internet Service
  • Gigabit Ethernet port to connect to computer or router
  • ARRIS Certified Refurbished
  • ARRIS Certified Refurbished products will ALWAYS be branded ARRIS, Never Motorola! If you get Motorola branded product they are illegitimate, need to be returned to Seller and Reported to Amazon
  • Not compatible with: Verizon, AT&T, or CenturyLink
  • Internet speeds up to 686 Mbps on 16 Download Channels and 131 Mbps on 4 Upload Channels, based on your cable ISP subscription
  • US Technical support

17. NETGEAR CM500-100

  • Netgear Refurbished product may have a removed serial number
  • Eliminate monthly cable modem rental fee’s ($120 or more a year).
  • All accessories are included with limited documentation and additional information online.
  • Netgear Certified Refurbished product is manufacturer refurbished to work and look as new with 90 Day Warranty and email support
  • Gigabit Ethernet port—Fastest wired speeds to connect your router or computer
  • DOCSIS 3.0 Cable Modem with 1 Gigabit Ethernet port.
  • Up to 680Mbps download and upload speed
  • Separate router required for WiFi
  • You will need to state the product is refurbished (state the full part number) if emailing customer support
  • 16×4 channel bonding
  • See the attached (image) flyer to obtain the Serial Number and MAC Address information that maybe needed by your Cable provider before contacting them.

18. MOTOROLA MB7220 (8×4)

  • (This cable modem does not have a built-in wireless router or VoIP telephone adapter
  • A two-year warranty plus rugged lightning and power surge circuits protect your investment.
  • Cable modem’s Ethernet port connects to a computer, HDTV, game station, or wireless router
  • A Full-Band Capture digital tuner ensures a faster, more reliable Internet.
  • Certified by Comcast XFINITY, Time Warner Cable, Cox, BrightHouse, and other leading cable service providers for modem ownership programs that typically save rental charges of $120 or more per year
  • This 8×4 DOCSIS 3.0 cable modem provides speeds up to 343 Mbps, eight times faster than DOCSIS 2.0
  • The Motorola MG7310, MG7315, and MG7550 have a built-in wireless router.)
  • Experienced USA-based customer support specialists are there to help if you need them.
  • Setup is fast and easy with a few quick steps set out in a Quick Start guide
  • Attractive, compact design minimizes shelf space, improves cooling, and extends product life while looking great in any home or office
  • Requires cable Internet service

19. ARRIS SURFboard SB6190 DOCSIS 3.0

  • Cable internet service required
  • Compatible with major U.S
  • 1 Gigabit Ethernet port for connecting to a Wi-Fi router or other device.
  • Not compatible with ATT, Verizon, CenturyLink or other DSL or Fiber internet providers.
  • Does not inlcude Wi-Fi and does not support cable digital voice service.
  • Compatible with major U.S
  • Cable Internet Providers including Cox, Spectrum, Xfinity & others
  • DOCSIS 3.0 Cable Modem best for cable internet speed plans up to 600 Mbps
  • 32 downstream x 8 upstream DOCSIS 3.0 bonded channels
  • Cable Internet Providers including Cox, Spectrum, Xfinity & others
  • Not compatible with ATT, Verizon, CenturyLink or other DSL or Fiber internet providers

20. MOTOROLA MG7550 (16×4)

  • Includes phone and web support by friendly, professional USA-based technical support specialists
  • Built-in high-speed WiFi router with AC1900 WiFi, and Power Boost, and DFS provides Internet access for WiFi devices including smartphones, notebooks, tablets, game stations, HDTVs, Amazon Echo, Google Home, Chromecast, Roku, Amazon Fire TV, and AppleTV
  • WiFi performance is exceptionally good, even in multi-dwelling units with lots of WiFi noise from neighbors
  • ELIMINATE CABLE MODEM RENTAL FEES UP TO 156 DOLLARS PER YEAR
  • A two-year warranty plus rugged lightning and power surge circuits protect your investment
  • Integrating the cable modem and router creates a reliable connection that reduces unwieldy wiring and power adapter clutter while conserving desk space
  • Approved by and for use with Comcast Xfinity and Xfinity X1, Cox, Charter Spectrum, Time Warner Cable, Suddenlink, WOW!, CableOne and other cable service providers
  • Four 10/100/1000 Gigabit Ethernet LAN ports provide wired connections to Windows and Mac computers, HDTVs, game stations, streaming TV devices, and other Ethernet-capable devices.
  • The vertical design minimizes shelf space and improves cooling while looking great in any home or office
  • This product is recommended for actual cable Internet service speeds up to 375 Mbps
  • A Broadcom cable modem chipset provides security from Denial of Service attacks
  • No cable modem is compatible with fiber optic, DSL, or satellite services from Verizon, AT&T, CenturyLink, Frontier, and others
  • (Savings are shown for Xfinity and vary by cable service provider
  • Requires cable Internet service
  • In addition, AnyBeam beamforming at both 2.4 GHz and 5 GHz frequencies focuses the signal on wireless clients to further enhance performance and range.
  • 16×4 DOCSIS 3.0 cable modem plus a built-in AC1900 Dual Band (2.4 GHz and 5 GHz) WiFi Gigabit Router with four Gigabit (GigE) Ethernet ports, a firewallDFS, Power Boost, and more
  • Model MG7550 has no phone jack.)
  • The router can work on WiFi DFS frequencies, unlike most routers, so it is much less vulnerable to WiFi interference from neighbors
  • Phone support is provided in English and Spanish.
  • DFS and Power Boost are key
  • Wireless Power Boost adds high-performance WiFi power amplifiers to boost the wireless signals to the legal limit, giving a significant boost in speed and range

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21. NETGEAR C6220 Modem Router Combo

  • NOT compatible with Verizon, AT&T, CenturyLink, DSL providers, DirecTV, DISH and any bundled voice service.
  • FAST WiFi PERFORMANCE: Get up to 1200 square feet wireless coverage and 20 devices connected with AC1200 speed (up to 1200 Mbps).
  • BUILT FOR SPEED: Supports cable internet provider plans up to 200 Mbps speed.
  • MODEM TECHNOLOGY: Engineered with 16×4 channel bonding and DOCSIS 3.0.
  • SAVE MONTHLY RENTAL FEES: Model C6220 replaces your cable modem and WiFi router saving you up to $168/yr in equipment rental fees.
  • SAFE & SECURE: Supports WEP and WPA/WPA2 wireless security protocols.
  • VERSATILE CONNECTIONS: 2 Gigabit Ethernet ports and 1 USB port give you fast wired connections to your computer, printer, game box, storage drive, and other devices.
  • COMPATIBLE WITH ALL MAJOR CABLE INTERNET PROVIDERS: Including certification by Xfinity by Comcast, COX, and Spectrum

22. ARRIS SURFboard SBG7400

  • Compatible with major U.S
  • Best for cable internet speed plans up to 600 Mbps
  • Wi-Fi 5 AC2350 dual-band concurrent Wi-Fi Router with 4 Gigabit Ethernet ports
  • Cable Internet Providers including Cox, Spectrum, Xfinity & others
  • 24 downstream & 8 upstream channels
  • Cable internet service required
  • Setup and manage your network with the SURFboard Manager app
  • Not compatible with ATT, Verizon, CenturyLink or other DSL or Fiber internet providers
  • 3 products in 1: DOCSIS Cable Modem, AC2350 dual-band Wi-Fi, 4 port Gigabit Router (cable digital voice service not supported)

23. ARRIS SURFboard SVG2482AC DOCSIS 3.0 Cable Modem & AC1750 Dual-band Wi-Fi Router

  • 0 Cable Modem, AC1750 Wi-Fi Access Point, 4-Port Gigiabit Ethernet Router & Xfinity Telephony Modem.
  • 4 products in 1: DOCSIS 3
  • Not compatible with any other cable internet provider.
  • Cable internet service required.
  • 4 Gigabit Ethernet ports, 2 telephony ports for digital voice service
  • 24 downstream x 8 upstream DOCSIS 3.0 channels, best for Xfinity internet speed plans up to 600 Mbps
  • Approved for use with Xfinity internet & voice service

24. MOTOROLA MG7315 8×4 Cable Modem Plus N450 Single Band Wi-Fi Gigabit Router

  • (Savings are shown for Affinity and vary by cable service provider
  • For DOCSIS 3.0 services, this modem provides actual Cable internet service speeds up to 145 Mbps
  • No cable Modem is compatible with fiber optic, DSL, or satellite services from Verizon, AT&T, CenturyLink, and others
  • The vertical design further minimizes shelf space, improves cooling, and extends product life while looking great in any home or office.
  • Eliminate cable Modem rental fees up to 132 dollars per year
  • Requires cable internet service
  • 8×4 DOCSIS 3.0 cable Modem Plus a built-in N450 single band (2.4 GHz) Wi-Fi Gigabit Router with four Gigabit (GigE) Ethernet ports, a firewall, and more
  • Wireless power boost adds high-performance Wi-Fi power amplifiers to boost the wireless signals to the legal limit, giving a significant Boost in speed and range
  • Built-in high-speed Wi-Fi router with N450 Wi-Fi and Power boost provides internet access for Wi-Fi devices including smartphones, notebooks, tablets, game stations, HDTVs, Amazon echo, Google home, Chromecast, Roku, Amazon Fire TV, and Apple TV
  • Four 10/100/1000 Gigabit Ethernet LAN ports provide wired connections to Windows and Mac computers, HDTVs, game stations, streaming TV devices, and other ethernet-capable devices.
  • In addition, anybeam beamforming focuses the signal on wireless clients to further enhance performance and range.
  • This product is recommended for DOCSIS 3.0 and 2.0 cable services
  • Model MG7315 has no phone jack.)
  • Approved by and for use with Comcast Affinity and Xfinity x1, Cox, Charter spectrum, time Warner Cable, brighthouse, WOW!, Cable one, rcn, Mediacom and other cable service providers
  • A Broadcom Cable Modem Chipset provides security from denial of service attacks.
  • Integrating the cable Modem and router creates a more reliable connection that reduces unwieldy wiring and power adapter clutter while conserving desk space

25. ARRIS SURFboard SBG7600AC2 DOCSIS 3.0 Cable Modem & AC2350 Dual-Band Wi-Fi Router

  • Not compatible with ATT, Verizon, CenturyLink or other DSL or Fiber internet providers.
  • Cable internet service required
  • 32 downstream & 8 upstream channels
  • Compatible with major U.S
  • Setup and manage your network with the SURFboard Manager app
  • Wave 2 AC2350 dual-band concurrent Wi-Fi Router with 4 Gigabit Ethernet ports.
  • DOCSIS Cable Modem, AC2350 dual-band Wi-Fi, 4 port Gigabit Router (cable digital voice service not supported)
  • Cable Internet Providers including Cox, Spectrum, Xfinity & others
  • Best for cable internet speed plans up to 600 Mbps.

26. ARRIS SURFboard SBG8300 DOCSIS 3.1 Gigabit Cable Modem & AC2350 Dual Band Wi-Fi Router.

  • Wave 2 AC2350 dual-band concurrent Wi-Fi Router with 4 Gigabit Ethernet ports
  • Compatible with major U S Cable Internet Providers including Cox, Spectrum, Xfinity & others Cable internet service required Not compatible with ATT, Verizon, CenturyLink or other DSL or Fiber internet providers
  • 32 downstream x 8 upstream DOCSIS channels, 2 downstream x 2 upstream DOCSIS 3 1 OFDM channels Best for cable internet speed plans up to 4 Gbps
  • 3 products in 1: DOCSIS 3 1 Cable Modem, AC2350 Dual band Wi-Fi, 4 port Gigabit Router (cable digital voice service not supported)
  • Setup and manage your network with the SURFboard Manager app Add SURFboard skills to your Alexa network for voice management of your Wi-Fi settings
  • Cable internet service required

27. Synology RT2600ac – 4×4 dual-band Gigabit Wi-Fi router, MU-MIMO, powerful parental controls, Threat Prevention, bandwidth management, VPN, expandable coverage with mesh Wi-Fi -Modem Router Combos

  • Dual WAN capable for load balancing and failover support ; Operating Temperature 5°C to 40°C (40°F to 104°F)
  • System ram type: ddr3_sdram
  • Coverage area – 3,000 square feet
  • Powerful 4×4 802.11ac wave 2 radios with MU-MIMO and up to 2.53Gbps breakthrough wireless speeds
  • 1.7GHz Dual-core processor for fast, uncompromising performance
  • US version
  • Smart Connect for seamless transition between maximum speed or range
  • Hardware accelerated Layer 7 traffic control and monitoring

28. Netgear C6300-100NAS AC1750 (16×4) DOCSIS 3.0 WiFi Cable Modem Router Combo

  • Three-in-one DOCSIS 3.0 Cable Modem + AC1750 WiFi Router+ 4 Gigabit Wired Switch
  • Ideal for streaming HD videos, faster downloads, and high-speed online gaming
  • System requirements : Microsoft Windows 10, Vista, XP, 2000, Mac OS, UNIX, or Linux
  • DOCSIS 3.0 unleashes 16x faster download speeds than DOCSIS 2.0
  • Works with Cable Internet Providers like XFINITY from Comcast, Cox, Cablevision and more (not compatible with Cable bundled voice services)
  • 16×4 channel bonding/ Approved for plans up to 300 Mbps
  • Up to 680Mbps modem speed and Dual-Band AC1750 (2.4GHz & 5GHz) WiFi speed
  • Compatible with Xfinity from Comcast, Spectrum, Cox, CableONE & more

29. NETGEAR N600 (8×4)

  • Two in One DOCSIS 3.0 Cable Modem + WiFi Router with 2 Gigabit Ethernet ports and 1 USB 2.0 port.System Requirements Microsoft Windows 7, 8, Vista, XP, 2000, Mac OS, or other operating systems running a TCP/IP network
  • Ideal for streaming HD videos, faster downloads, and high speed online gaming
  • Not compatible with bundled voice services..Wifi technology:802.11n Dual Band Gigabit
  • Required for the fastest cable Internet speed tiers.Use with an N300 adapter like NETGEAR WNA3100 for maximum performance
  • 8×4 channel bonding, Denial of Service (DoS) attack prevention
  • Microsoft Internet Explorer 5.0, Firefox 2.0, Safari 1.4, or Google Chrome 11.0 browsers or higher
  • Compatibe with Xfinity from Comcast, Spectrum, Cox, & more
  • Up to 340Mbps modem speed and Dual Band N450 (2.4GHz & 5GHz) WiFi speed
  • ELIMINATE MONTHLY CABLE MODEM RENTAL FEES Up to $120 per year
  • DOCSIS 3.0 unleashes 8x faster download speeds than DOCSIS 2.0

30. NETGEAR Nighthawk Cable Modem WiFi Router Combo C7000-Compatibility Cable Providers including Xfinity by Comcast, Spectrum, Cox (Renewed) -Electronics

  • SAVE MONTHLY RENTAL FEES: Model C7000 replaces your cable modem and WiFi router saving you up to $150/yr in equipment rental fees
  • System Requirements Cable broadband Internet service, Check your cable Internet service provider web site for data speed tier compatibility, Not compatible with Cable bundled voice services, Microsoft Windows 7, 8, Vista, XP, 2000, Mac OS, UNIX, or Linux, Microsoft Internet Explorer 5.0, Firefox 2.0, Safari 1.4, or Google Chrome 11.0 browsers or higher
  • NOT compatible with Verizon, AT&T, CenturyLink, DSL providers, DirecTV, DISH and Cable bundled voice services
  • MODEM TECHNOLOGY: Engineered with 24×8 channel bonding and DOCSIS 3.0
  • BUILT FOR FAST SPEED: Best for cable provider plans up to 400 Mbps speed
  • SAFE & SECURE: Includes parental controls, and supports WEP and WPA/WPA2 wireless security protocols
  • VERSATILE CONNECTIONS: 4 Gigabit Ethernet ports and 2 USB ports give you fast wired connections to your computer, printer, game box, storage drive, and other devices
  • COMPATIBLE WITH ALL MAJOR CABLE INTERNET PROVIDERS: Including certification by Xfinity by Comcast, COX, and Spectrum
  • FAST Wi Fi PERFORMANCE: Get up to 1800 sq ft wireless coverage and 30 devices connected with AC1900 speed (up to 1900 Mbps)

The Buyer’s Guide

The Buyer’s Guide

Purchasing a modem could be a daunting task for most of us. As it not just involves checking the technical specifications, design, but it also involves checking compatibility with the cable internet provider & the subscribed service package. In this buyer’s guide, I’ll add a few things to consider when purchasing a modem.

1. Compatibility with Comcast Xfinity

Compatibility with Comcast approved modems

Compatibility with Xfinity is one of the most important things to consider when getting a modem. If you end up buying an incompatible modem, then it won’t work or have trouble connecting/activating. That’s why it’s very important to make sure that the modem you’ve chosen is compatible with their service.

2. Compatibility with Service Package

Compatibility with Service Package

A lot of people end up purchasing cable modems that are not suitable for their service package. If you’re subscribed to a 1000 Mbps plan, make sure that your modem is at least capable of providing speeds upto 1500 Mbps (20% more than the offering is a rule I generally follow.)

In many cases, people subscribed to a service package of 1000 Mbps end up choosing a modem that provides exact 1000 Mbps speed or even less, in both cases the experience shall be bad. That’s why make sure that you are picking a modem that isn’t just approved with Comcast Xfinity, but is also suitable for your service plan.

3. DOCSIS Technology (DOCSIS 3.0 vs 3.1)

DOCSIS Technology (DOCSIS 3.0 vs 3.1)

Do you have a gigabit connection at your home? In that case you should be grateful to the revolutionary DOCSIS technology. It is due to this tech, that the coaxial cables that are used for cable TV are capable of providing gigabit speeds (which was previously only possible via fiber optic cable.)

Although most of the cable internet providers in the United States are currently using DOCSIS 3.0, a few of them have upgraded to DOCSIS 3.1. So when picking a modem, make sure that you get a DOCSIS 3.1 modem if your network provider uses that technology for their networking infrastructure.

4. Channel Bonding

Channel Bonding

Have you ever gone through a modem listing and found out numbers like 32×8, 24×8, 16×8, 8×4, 4×4? These numbers represent the downstream and upstream channels. So for a modem that comes with 32 x 8 channel bonding, it’ll have 32 channels for downstream and 8 channels for upstream.

Basically, when picking a modem, you should make sure that the channels on your cable modem are actually equal or above the below speed requirements.

  • 32×8 (DOCSIS 3.1) = High Gigabit Speeds (Between 1-10 Gbps)
  • 32×8 = Gigabit speeds (Between 1-2 Gbps)
  • 24×8 = High speed plans (Between 800 Mbps to 1 Gbps)
  • 16×8 = Medium speed plans (Between 500 Mbps to 700 Mbps)
  • 8×4 = Slow speed connections (Between 100-400 Mbps)
  • 4×4 = Suitable for very slow speeds (Between 5-50 Mbps)

5. Standalone Modem vs Modem/router combo

Standalone Modem vs Modem/router combo

If you are looking for the best performance or are on the highest service package of Comcast Xfinity then you should consider getting a standalone modem. Since it’s a standalone modem, you’ll also have to get a wireless router separately.

In case you’re low on budget or don’t need very high-performance and your goal is to save rent, then a modem/router combo would make sense. Since it has both the units built in, there’s a chance that the performance won’t be as good as the standalone equipment, but it should get your job done.

6. Bad Modems

Bad Modems

Yes, if you’ve gone through the official Comcast Xfinity compatible modems list, you must have noticed that it involves a lot of modems that come with the Intel Puma 6 and 7 chipset which are known for latency issues, security vulnerabilities, etc.

One way to avoid getting a bad modem is by picking the right modem from our website (because by default we avoid using such modems in our list.) However, you can also check out the list of bad quality modems (if you need a list of all the bad quality modems.)

7. Price

Price

Budget is one of the most important factors to consider when getting a modem. Like mentioned above, purchasing a modem actually helps you save the monthly equipment rental. You should decide a budget that you are willing to allocate for your networking setup and choose products accordingly.

I think most of the good quality modems cost anywhere between $150-250. In some cases they’re standalone devices, in many cases they’re a combination of modem and router.

The FAQs

1. Which is the best modem for Comcast Xfinity?

According to my research, is the best option in terms of both compatibility and high speed plans.

2. Should I continue renting or consider buying?

Well, purchasing a modem offers a better return on investment. The avg monthly equipment rental for most of the providers in the US is $15, 1 year usage shall cost $180 which is almost equivalent to the cost of a better modem and not to forget the ownership benefits.

3. Why should I purchase an approved or compatible modem?

It’s quite important to purchase an approved modem, because if it isn’t compatible with Comcast, they won’t allow you to connect it. In case you still end up connecting, you’ll end up facing a lot of connectivity issues?

4. Is there any list of modems that I should avoid?

Yes, there are a few modems that come with the Intel Puma 6 and 7 chipset, they’re known to have security vulnerabilities, laggy speeds, and packet loss. You should avoid those bad modems.

5. Do I need DOCSIS 3.1 or would a DOCSIS 3.0 modem work?

This depends on the area and your cable provider. For instance, Comcast Xfinity has DOCSIS 3.1 in most of the locations in the US, however, the 3.1 technology isn’t implemented in all the locations. Also, if Comcast Xfinity supports the technology in your location, you should consider getting a 3.1 modem.

The Verdict

It doesn’t matter what your cable internet needs are. It also doesn’t matter which internet speed you’re subscribed to, if you’re in search of a highly compatible modem for your network, then this post should be really helpful.

In my opinion, you should consider getting a DOCSIS 3.1 modem with 32×8 channel bonding for gigabit connections and a future-proof setup.

In case you’re looking for a decent modem that can handle gigabit speeds (non DOCSIS 3.1) then you should consider getting a modem that has channel bonding above 24×8.

For medium intensive connection speeds, you should consider getting a modem that is compatible with Comcast + has channel bonding above 16×8.

I hope that you’ve found the best cable modem for Comcast. In case you have any trouble, feel free to contact me or comment below. I’m here to help.

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