Approved Cable Modems

Find a new cable modem for your ISP. Easily search by Internet Provider, brand, type (WiFi, No WiFi, Voice). Curated lists include Comcast XFINITY, SuddenLink, Cox modems, and more.  An outdated cable modem can cause lag on the network and may hinder receiving your subscribed internet speed. ​​Some people report receiving speeds over their subscribed speed by upgrading their cable modem. ​ ​​

Best Cable Modem

The NETGEAR CM500 is our top pick for Comcast XFINITY, Cox, Spectrum, and more. The CM500 is compatible with tiers up to 300 Mbps, including XFINITY Blast (200) and Extreme (300). The Netgear CM500 can be easily set up online with these 3 ISPs, meaning no call is needed. This modem has 16 download channels that provide faster surfing. Additionally, works well for all major ISPs.

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Best WiFi Modem

Motorola MG7540

Motorola MG7540

If you prefer a WiFi modem/router combo (a.k.a. Gateway), the Motorola MG7540 is the perfect buy. It is approved by ​most cable companies including Atlantic Broadband, Cable One, Comcast XFINITY, Spectrum (Time Warner Cable, BHN, Charter), and more with plans up to 300 Mbps.​​

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DOCSIS 3.1 Cable Modem



This is the NETGEAR CM1000. A DOCSIS 3.1 cable modem is required for the XFINITY Gigabit  / XFINITY Gig service. It is also compatible with Cox Ultimate, WOW 300Mbps & over, Cable One GigaOne service, and more. Why It’s The Best – Compatible with speeds up to 1 Gbps which will cover services for at least the next ten years.

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Tips For Buying A New Modem

  1. When buying a replacement modem, you should always buy new.  Used modems are too often returned because the provider cannot activate it. Most of the time the modem is registered to another provider or user and can’t be undone. Some used modems belong to cable companies and are reported as stolen often.
  2. Always buy from a reputable seller, such as directly from Amazon or authorized third-party sellers. This ensures that you will be able to register any equipment for warranties and/or replacements shall any issues arise.
  3. Be sure you are at least getting a DOCSIS 3.0 approved modem. This is the most widely used form of DOCSIS today. However, DOCSIS 3.1 is taking off. Most companies require a 3.0 or higher. Anything less will hinder the speed of your internet if the provider acknowledges it all.
  4. Be sure the cable modem can support the speed that you subscribe to from your ISP. If you are unsure of your speed tier, you can find this info on your bill. 
  5. Select a modem that has enough download channels to support the same speed. This is often a requirement from your provider. You will see this written most of the time as 32×8 (or different numbers), with the first number being download channels and the second upload channels. This is often referred to as channel bonding.
  6. Decide if you want a separate modem and router, one with a built-in router or an eMTA unit.

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Activate XFINITY Modems – 7 Easy Steps

Easily activate XFINITY modems by following these easy steps. Self-Activation is available online. There is no need to call Comcast. If you need a new XFINITY modem, you can find one for your needs here. See all XFINITY Cable Modems.