Key Takeaways
- As of mid 2026, no DOCSIS 4.0 modems are sold at retail. The only DOCSIS 4.0 devices in homes today are ISP-provided gateways like Comcast's XB10 and XD4.
- Consumer DOCSIS 4.0 modems from Hitron, ARRIS, Motorola, and NETGEAR are expected to launch in late 2026, with pricing around $150 to $250.
- For nearly everyone in 2026, a DOCSIS 3.1 modem with a 2.5 GbE port is still the smartest buy. It will work on DOCSIS 4.0 networks as a fallback.
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Short Answer: Can You Buy a DOCSIS 4.0 Modem in 2026?
Not at retail. As of May 2026, there are zero DOCSIS 4.0 modems available on Amazon, Best Buy, or Newegg for direct consumer purchase. Every DOCSIS 4.0 modem in active use today is rented from an internet provider, not bought from a store. The first retail models are expected to ship in the second half of 2026.
If you need a new modem right now and want multi-gig speeds, the best move is a high-end DOCSIS 3.1 modem with a 2.5 Gbps Ethernet port. It will run on today's networks and remain functional when DOCSIS 4.0 reaches your area.
Why Retail DOCSIS 4.0 Modems Are Not Here Yet
DOCSIS 4.0 is a major leap. It supports up to 10 Gbps download and 6 Gbps upload, which is the first time cable internet can offer symmetrical multi-gigabit speeds. The catch is that ISPs have to upgrade their network plant first, then deploy compatible modems. Most U.S. cable providers are still in the rollout phase.
Manufacturers want to release retail modems only after a critical mass of customers can actually use them. That tipping point is expected in late 2026. For deeper background on the rollout, see our guide on What Is DOCSIS 4.0.
DOCSIS 4.0 Modems Available Through ISPs Right Now (Rental Only)
Comcast XB10 (Xfinity X-Class)
The XB10 is Comcast's flagship DOCSIS 4.0 gateway. It pairs DOCSIS 4.0 with Wi-Fi 7 and supports both Full Duplex DOCSIS (FDX) and Extended Spectrum DOCSIS (ESD). It is manufactured by Sercomm, includes four Ethernet ports, and can connect up to 300 wireless devices. Maximum throughput is rated at 10 Gbps. The XB10 is only available to Xfinity customers on X-Class plans (X-300, X-500, X-Gig, X-2Gig).
Comcast XD4 Standalone Modem
The XD4 is a no-frills DOCSIS 4.0 cable modem (no built-in Wi-Fi). It is typically paired with an XB8 gateway running in Ethernet WAN mode, or with a customer's own router. It has two 10 Gbps Ethernet ports. Like the XB10, it is only issued to X-Class subscribers.
Mediacom DOCSIS 4.0 Equipment
Mediacom launched commercial DOCSIS 4.0 service in select markets starting September 2025. Customers on its top tiers receive a Mediacom-issued DOCSIS 4.0 gateway. The exact hardware varies by market and is not sold separately.
Hitron CODA60 (Operator-Only)
The Hitron CODA60 is a real DOCSIS 4.0 modem, but it is designed for ISP deployment rather than retail sale. Cable operators use it as an upgrade path from the popular CODA and CODA56 platforms.
Retail DOCSIS 4.0 Modems Expected Late 2026
Industry analysts expect the first consumer-purchasable DOCSIS 4.0 modems to launch in the second half of 2026. Brands to watch include:
- Hitron: A retail variant of the CODA60 is the most likely first mover.
- ARRIS / CommScope: A SURFboard successor to the S33 is widely anticipated.
- NETGEAR: A DOCSIS 4.0 follow-up to the CM2000 is in development.
- Motorola: An MB-series DOCSIS 4.0 modem is expected to round out the lineup.
Early retail pricing should land between $150 and $250. Prices will drop as production scales and more ISPs certify the devices.
What to Buy Right Now: Best DOCSIS 3.1 Modems for 2026
Until DOCSIS 4.0 modems reach retail and your ISP supports them, a DOCSIS 3.1 modem with a 2.5 GbE port is the right purchase. These models cover any cable plan up to 2.5 Gbps and are compatible with Xfinity, Spectrum, Cox, and most other major providers.
| Modem | Standard | Max Speed | Ethernet Port | Best For |
|---|---|---|---|---|
| ARRIS S33 | DOCSIS 3.1 | 2.5 Gbps | 1 x 2.5 GbE | Most reliable all-around pick |
| Motorola MB8611 | DOCSIS 3.1 | 2.5 Gbps | 1 x 2.5 GbE | Strong value, low-latency |
| NETGEAR CM2000 | DOCSIS 3.1 | 2.5 Gbps | 1 x 2.5 GbE | Multi-gig Xfinity and Cox plans |
| Hitron CODA56 | DOCSIS 3.1 | 2.5 Gbps | 1 x 2.5 GbE | Best value with Mid-Split support |
For a deeper comparison, see our full guide on the Best DOCSIS 3.1 Modems for 2026.
Should You Wait for DOCSIS 4.0?
Wait only if all three of these are true: your ISP already offers DOCSIS 4.0 service in your neighborhood, you can use symmetrical multi-gig speeds, and you do not need a new modem urgently. For everyone else, a DOCSIS 3.1 modem makes far more sense. DOCSIS 3.1 modems are widely available, fully supported, and will continue to work on DOCSIS 4.0 networks (though without the higher upload speeds). For a side-by-side breakdown, see DOCSIS 3.1 vs DOCSIS 4.0: Should You Upgrade in 2026?
Frequently Asked Questions
Are DOCSIS 4.0 modems available to buy in 2026?
Not at retail. As of mid 2026, all DOCSIS 4.0 modems in service are ISP-issued gateways like the Comcast XB10 or XD4. Consumer retail models from Hitron, ARRIS, NETGEAR, and Motorola are expected to launch in the second half of 2026.
What is the Comcast XB10 and how do I get one?
The XB10 is Comcast's first DOCSIS 4.0 gateway, combining DOCSIS 4.0 with Wi-Fi 7. It is available only to Xfinity customers on X-Class symmetrical internet plans (X-300, X-500, X-Gig, or X-2Gig) in areas where Comcast has deployed DOCSIS 4.0. You cannot purchase one separately.
What speeds will DOCSIS 4.0 deliver?
DOCSIS 4.0 supports up to 10 Gbps download and 6 Gbps upload. This is the first cable internet standard to enable symmetrical multi-gigabit speeds, putting cable on par with most fiber services at the consumer level.
Will my current DOCSIS 3.1 modem work on a DOCSIS 4.0 network?
Yes. DOCSIS is backward compatible. A DOCSIS 3.1 modem will continue to function on a DOCSIS 4.0 network, but you will not get the higher upload speeds or lower latency that DOCSIS 4.0 enables until you upgrade to a DOCSIS 4.0 device.
Which ISPs offer DOCSIS 4.0 service in 2026?
Comcast (Xfinity) is the most widely deployed, with commercial DOCSIS 4.0 service in more than ten U.S. markets. Mediacom launched in select markets starting September 2025. Charter (Spectrum) is upgrading its network. Cox, Midco, and Cogeco are expected to follow as equipment and pricing improve.
How much will retail DOCSIS 4.0 modems cost?
Industry analysts expect early retail DOCSIS 4.0 modems to launch in the $150 to $250 range. Prices should fall over the following year as production scales and more ISPs certify the devices, similar to how DOCSIS 3.1 modems became cheaper after their initial release.
Do I need a Wi-Fi 7 router to use DOCSIS 4.0?
No, but it helps. To take full advantage of DOCSIS 4.0 multi-gigabit speeds wirelessly, you will want a router that supports Wi-Fi 6E or Wi-Fi 7 and has a 2.5 GbE or 10 GbE WAN port. Otherwise, the modem will be faster than your network can use.
