DOCSIS 4.0

Review

Best DOCSIS 3.1 Modems (2026) for Xfinity, Spectrum & Cox

The best DOCSIS 3.1 modems of 2026, ranked by speed tier and ISP. See which modem fits your plan, which ones support faster uploads, which combos are worth it, and why 3.1 is still the right buy while retail DOCSIS 4.0 modems...

Aug 5, 202616 min read

Best DOCSIS 4.0 Modems Available in 2026

No DOCSIS 4.0 modem is sold at retail as of September 2026. Every one in use is an ISP gateway like Comcast's XB10 or XD4. Here is where the rollout stands, what "DOCSIS 4.0 ready" marketing means, and why a DOCSIS 3.1...

May 19, 20268 min read

DOCSIS 3.1

DOCSIS 4.0 vs DOCSIS 3.1: What's the Real Difference?

DOCSIS 4.0 promises symmetrical multi-gig speeds, but DOCSIS 3.1 still powers most cable internet today. Here is the real difference, in plain English.

May 19, 20266 min read

When Will Your ISP Support DOCSIS 4.0? 2026 Rollout Tracker by Provider

A plain-English, regularly updated tracker showing which cable internet providers have launched DOCSIS 4.0, which are still upgrading, and when most homes can expect access. Includes major ISPs like Xfinity, Spectrum, and Cox plus smaller regional operators.

May 18, 202611 min read

DOCSIS 3.1

DOCSIS 3.1 vs DOCSIS 4.0: Should You Upgrade in 2026?

DOCSIS 4.0 promises symmetrical multi-gigabit speeds over existing cable lines, but retail modems are not available yet. Here is what you need to know before deciding whether to upgrade from DOCSIS 3.1 in 2026.

Mar 25, 20267 min read

Troubleshooting

What Is DOCSIS 4.0? Speeds, Timeline, and 2026 Availability Guide

DOCSIS 4.0 is officially here, bringing symmetrical multi-gigabit speeds to cable internet for the first time. While fiber remains the gold standard, this massive upgrade to existing coaxial networks supports up to 10 Gbps down and 6 Gbps up. From Comcast’s latest...

Mar 9, 202612 min read

Troubleshooting

DOCSIS Versions Explained: 1.0 to 4.0 Speeds and What to Buy

Every DOCSIS version from 1.0 to 4.0 in one comparison table, with release dates, maximum speeds, what each version changed, how to find the version your modem uses, and why DOCSIS 3.1 is the one to buy now that Xfinity and Spectrum...

Nov 7, 202513 min read

Setup

Best Modems for Xfinity 2026: Next Gen Upload Picks

Xfinity keeps two device lists, and the second one decides whether you get mid-split upload speeds. Here are the modems that qualify at each plan level, why the Arris S33 is not one of them, and how refurbished units activate on the...

Nov 7, 202510 min read