Top 7 Best Comcast Xfinity Approved Modems in 2023

If you’re a current Comcast Xfinity customer, you might be wondering: Why should I avoid renting Comcast Xfinity modem services? The reason is simple: the cost is outrageous!

Comcast Xfinity is one of the most renowned internet service providers in the USA. They offer the best internet services at competitive rates. However, in order to avail of their services, you need to pay a monthly rent of $11 to $14 for the modem they offer.

On top of that, the company increases its prices at double the rate of inflation. The standard rental modem costs $14/month. The amount seems small, but when you multiply it by 12 months, you are spending around $168-230 merely for the modem.

Instead of using the modem offered by Comcast Xfinity, you can choose any other compatible third-party modem to save money. One advantage of buying a modem is that it offers better performance.

The modems provided by Comcast Xfinity are unable to handle high gigabit speeds for data transfer, especially if you have a high-speed internet plan. So, to unleash the real potential of your service plan, it is best to purchase a modem for Comcast Xfinity. 

The best reason to purchase a third-party modem for Comcast Xfinity service is the savings it provides. Most modems come with built-in routers and can save you a lot of time and money by eliminating the need for a separate router. Another advantage is that they can save you money by removing the need to pay rental fees for a modem. 

You can expect to save around $13 per month, which is a significant amount of money. Furthermore, you’ll have full control over your device, which means you can customize it to your liking and install a VPN or other internet security software.

In addition to saving money, you’ll also benefit from having access to hardware support from your provider. You can save a lot of time and hassle by purchasing your own modem. It will be much easier to use than the one offered by the company. 

There is a complete list of Comcast Xfinity-approved modems, but most of the devices listed lag in terms of performance. So to help you, we have rounded up the best Comcast Xfinity-approved modems this year. Each of the devices listed here has been selected, keeping the perfect balance of compatibility, coverage, speed, and performance in mind.

In a hurry? Here are our top 3 favorite picks when it comes to the best Comcast Xfinity approved modems in 2023!

Best Overall

ARRIS Surfboard S33

Runner Up

Motorola MB8600

Budget Pick

NETGEAR Cable Modem

ARRIS Surfboard S33 DOCSIS 3.1 Multi-Gigabit Cable Modem | Approved for Comcast Xfinity, Cox, Spectrum & More | 1 & 2.5 Gbps Ports | 2.5 Gbps Max Internet Speeds | 4 OFDM Channels | 2 Year Warranty

Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port

NETGEAR Cable Modem CM500 - Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 400Mbps | DOCSIS 3.0

Star Ratings

Prime Features
Amazon Prime

Amazon Prime

Amazon Prime

Best Overall

ARRIS Surfboard S33

ARRIS Surfboard S33 DOCSIS 3.1 Multi-Gigabit Cable Modem | Approved for Comcast Xfinity, Cox, Spectrum & More | 1 & 2.5 Gbps Ports | 2.5 Gbps Max Internet Speeds | 4 OFDM Channels | 2 Year Warranty

Star Ratings

Prime Features
Amazon Prime

Runner Up

Motorola MB8600

Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port

Star Ratings

Prime Features
Amazon Prime

Budget Pick

NETGEAR Cable Modem

NETGEAR Cable Modem CM500 - Compatible with All Cable Providers Including Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 400Mbps | DOCSIS 3.0

Star Ratings

Prime Features
Amazon Prime

The Full List of All Comcast Xfinity Approved Modems

A high-quality Comcast Xfinity compatible modem will give you a superior internet experience. Its built-in routers can help you enjoy faster page loads and enhanced interactive applications. If you want to buy a modem for Comcast Xfinity internet connection, choose from the list of approved devices.

The full list of all Comcast Xfinity-approved modems contains all the models that are approved by Comcast. Here are some models you can use. However, make sure you select DOCSIS 3.1 modems.

  • Arris Models: T25, S33, G36, G34, SBG8300, SB8200, SBV3202, SBG7600AC2, SBG7400AC2, SB6190, SVG2482AC, SBV2402, SBG10, SB6183, SBG6950AC, TM822R, TM822G, TG862G, and TM722G.
  • Asus Models: CM-32, CMAX6000 and CM-16.
  • D-Link Model: DCM301
  • Hitron Model: CDA-CCC and CODA
  • Humax Model: HGD310
  • Linksys Models: CM3024, CG7500, CM3016, and CM3008.
  • Motorola Models: MB8600, MG8725, MB8611, MG8702, MT7711, MG7700, MB7621, MG7540, MB7420, MG7550, and MT8733.
  • Netgear Models: CM2000, CM1200, CM1150V, CM1100, CM1000v2, CM1000-1AZNAS, C6230, CAX80, CBR750, C7800, CM600, CM700, CBR40, C6900, C7000-1000NAS, C7100V, C7000v2, CM2050V, CM500V, C6250-100NAS, CM500-100NAS, C6300v2, C6300, CAX30, C3700v2, C6220, C3000-1000NAS, and C3700-100NAS.
  • SMC Model: D3CM1604
  • TP-Link Model: CR1900, TC7650, ARCHER CR700, TC-7620, ARCHER CR500, TC-W7960, and TC-7610.

How to Set Up a Comcast Modem?

When you buy a new Comcast cable modem, you’re probably wondering how to set it up. The first step is to connect it to an AC power source. You can do this by connecting the coaxial cable from the back of the modem to the cable outlet jack on your wall. Next, plug in the modem to a flat surface and plug it into the power source. Once the modem is powered up, you can begin setting it up.

Once you have plugged in the equipment, you’ll need to connect the Ethernet cable to your computer. Now, the power lights will turn on, so you can log in to the modem. To log in, you need to open the computer browser and enter the location given on the back of the modem.

After that, you can follow the setup wizard guide and follow the steps to log in to the internet. You can customize the settings and then start using the modem. Wait for a green light to verify that your internet connection is working properly. Once it has been activated, connect your modem to your wireless network. This will ensure that it’s working correctly and will not disconnect your internet connection.

Now that you know how to set up a modem let’s check out the best devices you can purchase. Here are the top 7 best Comcast Xfinity-approved modems in 2023.

1. ARRIS Surfboard S33 Multi-Gigabit Cable Modem – Best Overall


  • 2.5Gbps Ethernet Port
  • Stylish design
  • Extra Gigabit Ethernet Port
  • High-speed performance
  • Approved for Comcast Xfinity
  • Best value modem
  • Connects to existing Wi-Fi router

  • No voice capabilities

The ARRIS Surfboard S33 Multi-Gigabit Cable Modem is a high-performance, affordable option for your home network. This device can achieve full gigabit speeds and comes with many features. The best thing about this modem is that it is approved for Comcast Xfinity. If you have high-speed internet plans from this company, this modem will help you reach your full potential.

This cable modem is compact and lightweight. It measures 5.14 inches by 1.8 inches by 4.74 inches. It weighs only a pound, which matches the size of the Wi-Fi 6 broadcasters from ARRIS. It also features rounded corners, which match the design of the ARRIS wireless-networking devices. The ARRIS Surfboard S33 is equipped with two Ethernet ports and two network ports.

When it comes to speeds, this DOCSIS 3.1 modem supports the highest speeds offered by your ISP. It can handle a download speed of 2.5Gbps and an upload speed of up to 1Gbps. This means that you can load any media or stream it in no time. 

In terms of size, the ARRIS S33 is the smallest of the Multi-Gigabit cable modems. It also features two network ports and a Wi-Fi router. This modem also offers backward compatibility with older DOCSIS versions, making it ideal for slower internet connections.

The S33 supports DOCSIS 3.1 technology and is backward-compatible with DOCSIS 3.0 technology. It is recommended for cable internet speed plans up to 1.2 Gbps. In addition, the Surfboard S33 is compatible with a Wi-Fi router and is compatible with any wireless router. Lastly, it also saves you money on rental fees and monthly charges.

The Surfboard S33 is the top-of-the-range DOCSIS 3.1 cable modem that comes with 2 Ethernet ports, i.e., 2.5 Gbps and 1 Gbps. This modem also features 32 downstream x 8 upstream bonded channels. It also features two upstream x 2 downstream OFDM DOCSIS 3 1 channels.

Why Is This The Best Comcast Xfinity Modem In 2023?

The Surfboard S33 DOCSIS 3.1 modem is a top-seller in its class and offers backward compatibility with DOCSIS 3.0 ISPs. Its Gigabit Ethernet port allows you to connect your home network to a high-speed network. With DOCSIS 3.1 technology, you can enjoy even faster speeds than a Gigabit connection. And thanks to the Surfboard S33’s backward compatibility, you can connect your modem to any ISP service that uses the DOCSIS 3.0 standard.

This modem is compatible with Wi-Fi 6 routers and is recommended for use with a high-speed internet connection. You can use it with top ISPs like Xfinity, Cox, Spectrum, etc. 

The Surfboard S33 DOCSIS 3.1 Cable Modem is a top pick because it offers the fastest internet speeds. With a 2.5 Gbps Ethernet port and one Gigabit Ethernet port, you can experience multi-gig Internet speeds. If you have a cable internet speed plan of 1.2 Gbps or lower, the ARRIS Surfboard S33 is the best choice. It is compatible with any Wi-Fi router, saving you money on monthly rental fees.

If you have a high-speed internet plan and want to stay connected with the fastest speeds, then you can opt for this modem. It supports the maximum download and upload speeds for applicable internet plans. These features make the Surfboard S33 an ideal Modem for Comcast Xfinity.

The ARRIS Surfboard S33 is the best modem for Comcast Xfinity. It is a consumer-approved DOCSIS 3.1 cable modem that delivers up to 2.5 Gbps. It is also 10x faster than the cheapest Comcast Xfinity standard modem. This device is also more versatile than a certified router.

The DOCSIS 3.1 technology offers better security and increased network capacity. By combining DOCSIS 3.1 and DOCSIS v3 technologies, this modem can transmit 50 percent more data over the same spectrum, ensuring a more reliable and safer connection. It is overall the best modem for Comcast Xfinity.

2. Motorola MB8600 DOCSIS 3.1 Cable Modem – Runner Up


  • Four Ethernet Ports
  • Re-enabled Spectrum analyzer
  • DOCSIS 3.1
  • Supports LAG
  • Elegant Design
  • Works with major ISPs

  • Expensive compared to other modems

The Motorola MB8600 DOCSIS 3.1 Cable Modem is a great device that will keep your internet connection fast and reliable. It offers a single Gigabit Ethernet port, which you can use to connect to an Ethernet-enabled device. The modem also has three additional Ethernet ports, which are covered with a yellow cover. These ports are not for connecting multiple devices but for bonding multiple Ethernet ports. It supports download speeds of 1 Gb/s, which is 46 times faster than DOCSIS 2.0.

Although the MB8600 offers a single gigabit Ethernet port, it’s actually too fast to be able to connect to your cable provider’s network. The Motorola MB8600 has a two-year warranty, is DOCSIS 3.1 certified, and supports Gigabit Ethernet. It is recommended for Comcast Xfinity. If you have this internet plan, you can buy this modem to enjoy high-speed internet.

The setup process of the MB8600 is very simple, but you can also do it manually by calling your ISP for help. The first step is plugging the cable into your computer, which is then connected to the router. After that, you can open a web browser and follow the instructions on the screen. Once the setup process is complete, you can try your connection by accessing a web page.

MB8600 cable modem is compatible with major ISPs. Despite the price tag, this device supports DOCSIS 3.1 and DOCSIS 3.0. This means that it will always be compatible with your internet service. It’s also backward compatible with older DOCSIS 3.0 devices, making it a great choice for people with slow Internet plans.

The MB8600 is compatible with all leading ISPs. It is also compatible with DOCSIS 3.1 and DOCSIS 3.0 standards. Its speed is high, and it is suitable for leisure, home office, and gaming. With this modem, you can enjoy advanced features like Active Queue Management. It helps in reducing latency and offers seamless internet connectivity. Apart from that, you can also enjoy security from denial-of-service attacks.

3. NETGEAR Cable Modem CM500 – Budget Pick


  • Cheaper than renting a modem
  • Easy installation
  • Compatible with top ISPs
  • Reliable and fast speed
  • Durable design

  • It tends to overheat

Netgear CM500 cable modem supports DOCSIS 3.0, which is 16 times faster than the earlier 2.0 devices. It also works with Comcast Xfinity in the United States. As this modem is affordable, you can buy it instead of getting a rental plan. It will help you to save a lot of money,

This cable modem is compatible with all major cable ISPs in the US, including Comcast Xfinity. It supports DOCSIS 3.0 technology and provides up to 400 Mbps of download and 132Mbps upload speeds. This device is backward compatible with earlier DOCSIS standards and comes with an Ethernet cable and power adapter. It has an impressive range of features, so it’s worth considering for most home users.

The NETGEAR CM500 is a high-speed cable modem that works with most cable service providers. It supports DOCSIS 3.0 and is certified for use with all major U.S. cable providers. It’s easy to install and works with most of them. It’s compatible with Xfinity’s 100+ plans, which is the fastest available. 

The CM500 is an excellent cable modem with fast speeds and comes with 1 Gigabit Ethernet port. You can connect it directly to your computer or Wi-Fi. It supports speeds up to 400 Mbps and is ideal for people with slower connections. This device supports a variety of wireless protocols. 

The Netgear CM500 is a high-speed cable modem. Its DOCSIS 3.0 compatibility is one of its main benefits. By eliminating the need for a monthly fee from your cable service provider, you can save on monthly cable bills. This is the best choice for many people looking for high-speed internet access. On top of that, it is extremely affordable. It will help you to save $168/year if you switch from Comcast Xfinity rental modem plan.

4. NETGEAR Nighthawk Wi-Fi Cable Modem Router Combo C7000


  • Compatible with top ISPs like Xfinity, Spectrum, and Cox
  • Offers up to 960Mbps Wi-Fi speed
  • 24x faster download speed
  • Three-in-one device
  • DOCSIS 3.0

  • Fewer security features

The NETGEAR Nighthawk AC1900 Wireless Cable Modem Router Combo is another device you can use with Comcast Xfinity. It offers Wi-Fi speeds of up to 1.9Gbps, which means you can stream HD video without interruption. This device also eliminates the need to rent Internet service from your provider. It is ideal for those with high-speed Internet cable services and is compatible with Comcast Xfinity data plans. This device is affordable and easily available online.

The Nighthawk C7000 is an all-in-one device that offers high-speed Wi-Fi. It offers 600 Mbps on the 2.4 GHz band and up to 1300 Mbps on the 5 GHz band. It is equipped with advanced security features, including dual firewall protection, DoS attack prevention, and beamforming, which allows you to have reliable Wi-Fi connections no matter where you are in the home.

The Nighthawk C7000 features four gigabit Ethernet ports. It can connect two computers and a couple of game consoles. It is easy to set up and has inbuilt antennas for a stable internet connection. The wireless speeds are also impressive. The range is decent, so you won’t need to worry about interference or losing connection.

The Nighthawk AC1900 Wi-Fi Cable Modem is a worthy candidate for your investment. The built-in DOCSIS 3.0 supports combined Wi-Fi speeds of up to 1.9Gbps. The 24×8 channel bonding on the cable modem ensures that the best possible speeds are always achieved. This device also saves you money by eliminating the need to lease Internet service providers’ equipment.

5. Linksys High-Speed Cable Modem Router (CG7500)


  • Model + Wi-Fi router
  • Comcast Xfinity approved
  • Simple and easy setup
  • High-speed Wi-Fi
  • Versatile connectivity with Ethernet ports

  • Doesn’t support voice bundle services

The CG7500 Wireless Modem and Router from Linksys combines the features of a modem and a wireless router to offer superior performance. It supports a wide variety of cable broadband service providers and boasts speeds that are up to 4.3 times faster than DOSIS 2.0. This router is compatible with multiple data plans up to 300Mbps and is easy to install. The CG7500 also comes with an instruction manual that covers basic installation and configuration.

This router features 24 download channels and eight link download channels. This is an advantage because it means maximum efficiency for transferring data. The CG7500 supports DOCSIS 3.0 certification, which means that it is compatible with multiple cable Internet providers like Comcast Xfinity, Spectrum, etc. The Wi-Fi offers peed up to 1.9 Gbps. The dual-band offers better performance and speed. 

The CG7500 is a certified device that supports DOCSIS 3.0 technology. This newer technology offers speeds that are eight times faster than DOSIS 2.0. This modem router also supports channel bonding. A DOCSIS 3.0 AC1900 cable modem router from Linksys is a great way to improve your internet connection. 

The CG7500 is an excellent choice for users who want to replace rented modems in their homes. The device combines the functions of a router and modem and is perfect for homes with high levels of internet activity, such as high-end gaming and 4K video streaming. The CG7500 wireless modem works well with several cable ISPs. 

It has multiple Ethernet ports and can connect to more than one wireless network. It is compatible with a wide range of devices and is easy to set up. Its powerful hardware and DOCSIS 3.0 modem provide higher speed and better Wi-Fi.

6. NETGEAR Cable Modem CM600


  • Compatible with all ISPs and Wi-Fi routers
  • Can handle network congestion
  • Fast speed
  • Good for future-proofing

  • Adapts slowly to setting alterations

The Netgear CM600 is a cable modem that is designed to sit on your desk and be easy to manage. Unlike most cable modems, it does not have a front panel, which means it will not be in your way when you are working or playing. There are three lights that remain steady while two blinks at different speeds. This allows you to keep an eye on how it is communicating with the ISP.

The NETGEAR CM600 is one of the most affordable and reliable cable modems on the market. It is compatible with all major internet service providers, including Charter and Comcast Xfinity. Instead of paying monthly rental fees for a modem, you can buy this affordable device. 

The CM600 is a great option for home users who want to get online at a reasonable price. The device is inexpensive and easy to install. It also has a long lifespan, and it is compatible with all major providers. It supports service plans that offer speeds up to 300 Mbps. Overall, the NETGEAR Cable Modem CM 600 is a very reliable and affordable device. It can be used with all major cable providers and is designed for easy setup. This modem also features 24×8 channel bonding. 

The CM600 is a great option for those who need a cable modem without a high-cost contract. Its black casing is lightweight and features a flat surface to prevent accidental falls. The CM600 is backward-compatible with DOCSIS 2.0 networks and is designed for DOCSIS 3.0. It offers eight times faster speed. This modem comes with 1 Gigabit Ethernet, which you can use to connect with Wi-Fi or a computer. 

7. ARRIS Surfboard DOCSIS 3.0 Cable Modem SB6141


  • 35.9 second boot time
  • High-speed download rates of 343 Mbps
  • Compatible with all major ISPs in North America
  • Two years limited warranty

  • It does not include a power reset button

The ARRIS Surfboard 8×4 (SB6141) DOCSIS 3.0 Cable Modem has many advantages over other models. It has a wired modem and Gigabit Ethernet port for high-speed internet. It has a 343 Mbps Mbps download speed and a 131 Mbps upload speed. It can also support multiple devices. The modem also features a VOIP telephone adapter for voice calls.

This DOCSIS 3.0 Cable Modem is an excellent choice for a home network. It is compatible with all major cable providers in the US, including Comcast Xfinity. It can be installed easily and is a great value. This model also supports IPv4 and IPv6 protocols. It is an economical option for building a home network. Ultimately, it’s a great option for anyone who needs high-speed internet.

With its Gigabit Ethernet connection, it doesn’t take up a lot of space in your home. This modem features four upload channels and eight download channels and comes with two years limited warranty. It is one of the best modems you can use with Comcast Xfinity internet plans. 

How to Choose the Best Comcast Xfinity Approved Modem in 2023?

If you want to buy a new Comcast Xfinity-approved modem, make sure you consider these core factors. It will help you to make the right buying decision.

Speed Compatibility

When choosing a new modem for your Comcast Xfinity service, be sure to pick one that is compatible with your plan. This is a good way to future-proof your device for speed increases since nearly all of the newer models come with built-in routers. This feature can help you get the fastest speeds possible while also saving you time during setup. Depending on the speed you want to get, a built-in router can be beneficial for multi-device connections. 

ISP Compatibility

When purchasing a modem, you should consider ISP compatibility. Different ISPs support different versions of DSL, so you should purchase a compatible model. Make sure the modem your buy is Comcast Xfinity approved. You may also be able to buy a modem that is compatible with a newer version of DSL. The compatibility requirements vary depending on your ISP, but it is important to get one that matches your ISP’s requirements.


When buying a modem, security is an important feature to consider. It is essential to choose a modem that has high-level encryption. The security features of a modem are different than those of a router. While the latest models of most brands have higher security features, they may not receive manufacturer updates. Some models, such as the Intel Puma 6 Chipset, have vulnerabilities that could allow hackers to access your home network. 


If you’re about to buy a new internet modem, you’ll want to know what standards are required to use the device with your service provider. Cable internet companies change their DOCSIS standards every four to seven years. It’s best to make sure the device you’re considering is compatible with the cable provider’s network. If it doesn’t, you’ll be disappointed when you switch to a different company.


When choosing a modem, the number of ports should be a prime consideration. This is because a slow Ethernet port will make the rest of your connection slow, and you do not want that to happen. There are several different brands and models of modems on the market, so it is important to decide what you need before you begin shopping.

DOCSIS Technology

Another thing you need to consider is DOCSIS technology. Newer standards like DOCSIS 3.1 are faster and more reliable than older ones, and you can save money by buying a DOCSIS 3.1 modem. However, these high-end models can cost hundreds of dollars or even more. Therefore, you must check the specifications of your cable modem before you make your purchase.

Channel Bonding

If you have several computers connected to your network, you may want to consider channel bonding when buying a modem. This technology combines multiple internet connections into a single, fast pipe. It is possible to increase your download speed by more than 50% with channel-bonded DSL modems and routers. Consequently, your internet connection will have a much higher download speed than if the connections were separate.

Final Thoughts

Buying Comcast Xfinity-approved modems is more beneficial than paying monthly rental fees. However, not all modems that work with this ISP offer optimum performance. So to help you select the best model, we have reviewed the top 7 best Comcast Xfinity approved modems in 2023. 

You can select any of these devices by comparing the features and specifications. While we tried to pick only the best options, we plan to update this page regularly as better models launch. If you think we missed something or want to suggest anything, do let us know by commenting below.

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