To use your own modem with Xfinity, it must be approved by Comcast, support DOCSIS 3.1, and match the speed tier of your Internet plan. Approved modems are listed on Xfinity’s website and are tested for performance and reliability. Choosing a compatible modem gives you better speeds, fewer outages, and helps you avoid monthly equipment rental fees.
Why Choosing an Approved Xfinity Modem Matters
Not all modems work with Xfinity. Devices that aren’t on Xfinity’s approved list can cause slow speeds, dropped connections, or may not activate at all. By choosing a certified modem, you’re ensuring compatibility with Comcast’s network and getting the best experience for your plan.
Using your own Xfinity modem also means saving money—Comcast charges around $14/month to rent their modem, which adds up quickly.
What Makes a Modem “Xfinity-Approved”?
To be approved for use with Xfinity, a modem must meet the following:
- Xfinity Certification – It must appear on Xfinity’s official list of approved devices.
- DOCSIS 3.1 Support – DOCSIS 3.1 is the current standard for cable modems and provides the performance needed for today’s high-speed Internet plans.
Avoid DOCSIS 3.0 modems—they are legacy technology and not suitable for modern Internet speeds or future upgrades.
- Speed Tier Compatibility – The modem should support the speed tier you’re subscribed to—such as Fast, Superfast, or Gigabit Extra.
Hitron Modems That Work with Xfinity
Hitron manufactures high-performance cable modems that meet Xfinity’s technical requirements:
- Hitron CODA – DOCSIS 3.1 modem with a 1 Gigabit Ethernet port.
- Hitron CODA56 – DOCSIS 3.1 modem with a 2.5 Gigabit Ethernet port for future-ready networks.
These modems are compatible with most major cable Internet providers, including Xfinity. Learn more on our Retail Products page.
How to Check if a Modem Works with Xfinity
Use Xfinity’s My Device Info tool:
- Enter your ZIP code.
- Select your Xfinity Internet plan.
- Browse the list of certified modems by speed tier.
If your modem is listed, it’s approved for use. If not, you may run into issues activating it or may not get the speeds you’re paying for.
FAQs About Xfinity Modems
What does “Xfinity-approved” mean?
It means Comcast has certified the modem to work with their network. These devices are tested for performance, speed, and stability.
Can I use a modem that isn’t on the list?
It might not work—or work poorly. Comcast may block activation of unsupported devices.
What’s the difference between a modem and a router?
A modem connects your home to the Internet. A router creates your Wi-Fi network so your devices can connect wirelessly. You need both—but this article focuses only on modems.
Will I save money using my own modem?
Yes. You can avoid Comcast’s monthly rental fee and recoup your investment within a year.
Do I need DOCSIS 3.1 for Xfinity?
Absolutely. DOCSIS 3.1 is now the standard for fast, stable Internet. It also supports future upgrades and better performance. DOCSIS 3.0 is outdated and should be avoided.
What to Do Next
If you’re ready to stop paying rental fees and want faster, more reliable Internet, choose a DOCSIS 3.1 modem that’s certified by Xfinity. Hitron’s CODA and CODA56 are smart, future-ready choices that meet all of Xfinity’s technical requirements.
