If you want to stop renting a modem and get more control over your home internet setup, docsis 3.1 cable modems are the sweet spot for most cable plans today.
This roundup focuses on models that balance speed, ISP compatibility, and future-ready features like multi-gig ports and mid/high-split support.
Best 10 Docsis 3.1 Cable Modems Picks for 2026
Editors' Choice
ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem
- Supports cable plans up to 2 Gbps
- Two 1 Gbps Ethernet ports
- Works with major US cable providers
Best For: Buyers who want a compact modem-only setup for fast cable internet
Multi-Gig Pick
Hitron CODA56 DOCSIS 3.1 2.5 Gbps Modem
- Supports up to 2.5 Gbps cable plans
- Includes a 2.5 Gbps Ethernet port
- Modem-only design for router setups
Best For: Fast cable internet users who want multi-gig modem performance
Renewed Value Pick
ARRIS SURFboard S33 DOCSIS 3.1 Multi-Gig Modem
- Supports plans up to 2.5 Gbps
- Has 2.5 Gbps and 1 Gbps Ethernet ports
- Designed to work with an existing router
Best For: Shoppers who want a renewed multi-gig modem for cable internet
Future-Ready Pick
NETGEAR Nighthawk CM3000 DOCSIS 3.1 Modem
- Mid/high-split DOCSIS 3.1 design
- Up to 2.5 Gbps download and 1 Gbps upload
- Two Ethernet ports with 2.5Gb support
Best For: Advanced cable plans where faster upload speeds matter
Multi-Gig Compact Pick
- 2.5 Gbps Ethernet port for multi-gig service
- Approved for Xfinity, Cox, Spectrum, RCN, and Astound
- AQM helps cut latency for gaming and streaming
Best For: Cable customers wanting a compact modem for faster plans
Mid/High-Split Upgrade
NETGEAR Nighthawk CM2500 Modem
- Mid/high-split DOCSIS 3.1 modem with up to 2Gbps down
- Two Gigabit ports support link aggregation
- Works with Xfinity, Spectrum, and Cox
Best For: Users who want faster uploads and link aggregation support
Gigabit Mainstay
Motorola MB8600 DOCSIS 3.1 Modem
- DOCSIS 3.1 plus DOCSIS 3.0 32x8 support
- Approved for Xfinity, Cox, and Charter Spectrum
- AQM helps reduce latency for gaming and calls
Best For: People wanting a simple modem for Gigabit cable plans
Renewed Multi-Gig Pick
ARRIS S33-RB DOCSIS 3.1 2.5Gbps Modem
- Supports up to 2.5 Gbps cable speeds
- Approved for Cox, Spectrum, and Xfinity
- Renewed unit with 1-year limited warranty
Best For: Users who want a renewed multi-gig modem for major cable ISPs
Reliable 1 Gbps Choice
NETGEAR CM1000 DOCSIS 3.1 Modem
- Supports cable plans up to 1 Gbps
- Certified with Spectrum, Cox, and Xfinity
- 1 Gigabit Ethernet port for simple setups
Best For: Households on 1 Gbps cable plans that use their own router
Refurbished Gigabit Value
ARRIS SB8200-RB DOCSIS 3.1 Modem
- Supports up to 1 Gbps cable plans
- Two Gigabit Ethernet ports for flexibility
- Refurbished with 1-year limited warranty
Best For: Refurbished-buy shoppers needing a DOCSIS 3.1 modem for major cable ISPs
Editors' Choice – ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem
If you want a straightforward docsis 3.1 cable modems option for a high-speed cable plan, the ARRIS SURFboard SB8200 is built for up to 2 Gbps service and keeps the setup simple. It is modem-only, so you’ll need a separate Wi‑Fi router, but that also makes it a clean choice if you already have a router you like.
Best For: Cable internet customers who want a compact modem for Cox, Xfinity, or Spectrum and plan to pair it with their own router.
Pros:
- DOCSIS 3.1 support for plans up to 2 Gbps
- Two 1 Gigabit Ethernet ports for router connections
- CableLabs certified and tested with Cox, Xfinity, and Spectrum
- Compact design with discrete status LEDs
Cons:
- No built-in Wi‑Fi, so a separate router is required
- Not compatible with fiber, DSL, or satellite service
- Provider confirmation is still recommended before buying
The SB8200 is a practical pick if you want to own your modem, reduce rental fees, and keep the network layout simple. Its dual Ethernet ports and broad cable-provider support make it a reliable fit for many high-speed home setups.
Multi-Gig Pick – Hitron CODA56 DOCSIS 3.1 2.5 Gbps Modem
The Hitron CODA56 is a docsis 3.1 cable modems option for cable customers who want multi-gig potential and a modem-only setup. It supports plans up to 2.5 Gbps, includes a 2.5 Gbps Ethernet port, and is aimed at people pairing it with a separate Wi‑Fi router.
Best For: Cable internet users on 1 Gbps-and-faster plans who want a 2.5 Gbps modem with router flexibility.
Pros:
- Supports cable plans up to 2.5 Gbps
- 2.5 Gbps Ethernet port for multi-gig connections
- DOCSIS 3.1 with low-latency performance for gaming and streaming
- Compatible with Xfinity, Spectrum, and Cox
Cons:
- No Wi‑Fi included, so a router is required
- Will not work with fiber, DSL, satellite, or fixed wireless
- Needs ISP activation and compatibility checks before purchase
This is a strong value if your cable plan is already fast and you want hardware that can keep up. Just make sure your router and service plan are ready for multi-gig speeds before you buy.
Renewed Value Pick – ARRIS SURFboard S33 DOCSIS 3.1 Multi-Gig Modem
ARRIS - SURFboard S33 32 x 8 DOCSIS 3.1 Multi-Gig Cable Modem with 2.5 Gbps (Renewed)
Check Price On AmazonIf you are shopping docsis 3.1 cable modems and want a multi-gig option with a lower-cost renewed angle, the ARRIS SURFboard S33 is worth a look. It supports cable plans up to 2.5 Gbps and connects to your existing Wi‑Fi router, making it easy to slot into an already-built home network.
Best For: Cable customers who want a renewed multi-gig modem and already use their own router.
Pros:
- Supports cable internet plans up to 2.5 Gbps
- 2.5 Gbps Ethernet port plus an additional 1 Gbps port
- Works with major US providers like Cox, Spectrum, and Xfinity
- Connects to an existing Wi‑Fi router
Cons:
- No built-in Wi‑Fi
- Does not support cable digital voice service
- Not compatible with AT&T, Verizon, CenturyLink, DSL, or fiber service
The S33 makes sense if you want fast cable performance and plan to keep using your own router. The renewed listing and short warranty are worth noting, but the hardware still fits the job well for a multi-gig cable setup.
Future-Ready Pick – NETGEAR Nighthawk CM3000 DOCSIS 3.1 Modem
The NETGEAR Nighthawk CM3000 is a docsis 3.1 cable modems choice aimed at today’s fastest cable tiers, especially mid/high-split service. It is built for cable plans up to 2.5 Gbps download and 1 Gbps upload, and it connects to a separate router for full home networking.
Best For: Users on advanced cable plans who want stronger upload performance and a modem ready for faster service tiers.
Pros:
- Mid/high-split DOCSIS 3.1 design for faster upload speeds
- Supports up to 2.5 Gbps download and 1 Gbps upload
- Two Ethernet ports with 2.5Gb and link aggregation options
- Compatible with major US providers including Xfinity, Spectrum, and Cox
Cons:
- No Wi‑Fi included, so you need a router or Orbi system
- Made for use in the US only
- Download speed detail in the supplied specs is listed at 1 Gbps, so plan compatibility should be checked with your provider
If upload speed matters for gaming, video calls, cloud access, or camera/NAS use, this modem is positioned for that job. It is the most future-focused option here, but it makes the most sense when your provider supports the faster mid/high-split features it was built around.
Multi-Gig Compact Pick – Motorola B12 DOCSIS 3.1 Modem
If you want a DOCSIS 3.1 cable modem built for faster cable plans, the Motorola B12 is a strong compact option. It supports Comcast Xfinity, Cox, Spectrum, RCN, and Astound, and its 2.5 Gbps Ethernet port is designed to keep pace with multi-gig internet service when your plan and router can take advantage of it.
Best For: Users on compatible cable plans who want a compact modem with a 2.5 Gbps port and low-latency performance.
Pros:
- DOCSIS 3.1 support with a 2.5 Gbps Ethernet port for multi-gig speeds
- Approved for Comcast Xfinity, Cox, Spectrum, RCN, and Astound
- AQM is included to help reduce latency for gaming, conferencing, and streaming
- Can help avoid cable modem rental fees over time
Cons:
- Residential use only
- You should verify ISP compatibility before buying
- Single Ethernet port, so it relies on a separate router for Wi-Fi
The B12 is a practical choice if you want newer DOCSIS 3.1 hardware with room to grow into faster service tiers. Its speed potential and compact design make it a good fit for users focused on performance and simplicity.
Mid/High-Split Upgrade – NETGEAR Nighthawk CM2500 Modem
The NETGEAR Nighthawk CM2500 is a DOCSIS 3.1 cable modem aimed at faster cable networks, especially mid/high-split service. It supports up to 2Gbps download speeds and up to 1Gbps upload speeds, and it works with major U.S. providers including Xfinity, Spectrum, and Cox.
Best For: Buyers looking for a mid/high-split DOCSIS 3.1 modem with strong upload potential and dual Gigabit ports.
Pros:
- Mid/high-split DOCSIS 3.1 design supports up to 2Gbps down and 1Gbps up
- Two Gigabit ports support link aggregation for up to 2Gbps
- Compatible with major U.S. providers, including Xfinity, Spectrum, and Cox
- Can pair well with WiFi 6E or WiFi 7 routers and Orbi systems
Cons:
- Not compatible with Xfinity Voice plans
- Renewed unit with a 90-day limited warranty
- Made for use in the U.S. only
If your cable plan and provider support faster uploads, the CM2500 stands out as a more future-ready modem. It is especially appealing for households that care about upload-heavy work, gaming, and connected-home access.
Gigabit Mainstay – Motorola MB8600 DOCSIS 3.1 Modem
The Motorola MB8600 is a straightforward DOCSIS 3.1 cable modem for Gigabit-class cable plans. It supports Comcast Xfinity, Cox, and Charter Spectrum, and its single Gigabit Ethernet port lets you connect a router or one wired device without paying monthly rental fees.
Best For: Cable internet users who want a proven DOCSIS 3.1 modem for Gigabit plans and a simple router setup.
Pros:
- DOCSIS 3.1 plus DOCSIS 3.0 32×8 support for major cable services
- Approved for Comcast Xfinity, Cox, and Charter Spectrum
- Gigabit Ethernet port works with a router, PC, HDTV, or game station
- AQM is included to help reduce latency for gaming and video calls
Cons:
- No built-in Wi-Fi router
- No telephone call capability
- Only one device can connect directly over Ethernet without a router
The MB8600 remains a solid pick if you want a no-frills modem for widely supported cable plans. It is best suited to users who already have a good router and want dependable DOCSIS 3.1 performance.
Renewed Multi-Gig Pick – ARRIS S33-RB DOCSIS 3.1 2.5Gbps Modem
If you want a DOCSIS 3.1 cable modem that can handle multi-gig service, the renewed ARRIS S33-RB is built for speed-focused cable setups. It’s approved for Cox, Spectrum, Xfinity, and other major U.S. cable providers, and it supports up to 2.5 Gbps service while keeping the setup simple with a separate Wi-Fi router.
Best For: Cable internet users who want a renewed multi-gig modem for Xfinity, Cox, or Spectrum and already have a router.
Pros:
- DOCSIS 3.1 support with 2.5 Gbps maximum internet speeds
- Approved for Cox, Spectrum, Xfinity, and other major cable providers
- Two Ethernet ports for flexible wired connections
- Renewed unit with a 1-year limited warranty
Cons:
- No built-in Wi-Fi, so you’ll need a separate router
- Not compatible with AT&T, Verizon, CenturyLink, Frontier, or non-cable services
- Does not support cable digital voice service
For buyers comparing DOCSIS 3.1 cable modems, this model stands out when you want higher-speed cable service without paying rental fees. It’s a practical choice if your provider is on the compatibility list and you want multi-gig headroom for the future.
Reliable 1 Gbps Choice – NETGEAR CM1000 DOCSIS 3.1 Modem
The NETGEAR CM1000 is a straightforward DOCSIS 3.1 cable modem for households that want a simple, modem-only setup up to 1 Gbps. It works with major cable providers like Xfinity, Spectrum, Cox, and Optimum, and it’s designed to pair with your own Wi-Fi router.
Best For: Cable subscribers with up to 1 Gbps plans who want a no-frills modem from a major brand.
Pros:
- DOCSIS 3.1 modem rated for cable plans up to 1 Gbps
- Certified with Spectrum, Cox, and Xfinity at listed speeds
- Single Gigabit Ethernet port keeps the setup simple
- Easy to connect to a separate Wi-Fi router
Cons:
- No built-in Wi-Fi
- Not compatible with Verizon, AT&T, CenturyLink, DSL, or bundled voice service
- Only one Ethernet port limits wired expansion
If you want a dependable DOCSIS 3.1 cable modem without extra features, the CM1000 is a sensible fit. It focuses on core cable connectivity and is best when your plan tops out around 1 Gbps.
Refurbished Gigabit Value – ARRIS SB8200-RB DOCSIS 3.1 Modem
The ARRIS SB8200-RB is a refurbished DOCSIS 3.1 cable modem aimed at users who want a proven gigabit-ready option for major U.S. cable providers. It’s approved for Cox, Spectrum, Xfinity, and others, and it supports up to 1 Gbps internet service with two Ethernet ports for wired flexibility.
Best For: Buyers who want a refurbished DOCSIS 3.1 modem for 1 Gbps cable service and multiple wired connections.
Pros:
- DOCSIS 3.1 modem approved for major cable providers
- Supports internet plans up to 1 Gbps
- Two 1-Gigabit Ethernet ports for wired devices or router connections
- Refurbished unit with a 1-year limited warranty
Cons:
- No built-in Wi-Fi
- Not compatible with AT&T, Verizon, CenturyLink, Frontier, or non-cable services
- Does not support cable digital voice service
Among DOCSIS 3.1 cable modems, this model offers a balanced mix of compatibility and wired connectivity in a refurbished package. It makes sense for cable users who want to avoid rental fees and do not need integrated wireless.
How We Picked These Docsis 3.1 Cable Modems
We prioritized broad compatibility with major cable providers, strong real-world speed support, and hardware that makes sense for buyers who want a modem they can keep for several upgrade cycles. We also looked for clear plan matching, multi-gig options where useful, and models that avoid unnecessary extras if you already have a good router.
Quick Comparison
Not every modem is meant for the same user. Basic gigabit-capable options are usually the best value for standard cable plans, while multi-gig and mid/high-split models are better suited for faster service tiers and households that want more headroom. If you are on a 300 Mbps to 1 Gbps plan, a simpler model may be enough. If you are paying for faster tiers or expect an upgrade soon, a higher-end option can be a smarter buy.
Key Buying Factors for Docsis 3.1 Cable Modems
Speed Tier Match
Choose a modem that supports your current plan, with some buffer for future upgrades. Overbuying can add cost without improving your actual speeds.
Port Speed and Router Pairing
Many Docsis 3.1 Cable Modems still use 1 Gbps Ethernet ports, which can bottleneck faster plans. If your service exceeds 1 Gbps, look for a 2.5 Gbps port and pair the modem with a router that can handle that speed.
Provider Compatibility
Always confirm support with your ISP before buying. Compatibility can vary by provider, region, and plan type, especially with newer mid/high-split implementations.
Future-Proof Features
If you plan to keep the modem for years, features like multi-gig connectivity, strong chipset support, and wider plan certification can matter more than small price differences.
Who Should Buy Which Docsis 3.1 Cable Modems?
Budget-conscious shoppers on standard cable plans should look at straightforward gigabit-capable models. Users who want to cut a modem rental fee and upgrade once may prefer a reliable mainstream pick with wide ISP support. Households on faster internet tiers, power users, and anyone planning for next-gen cable speeds should focus on multi-gig or mid/high-split options.
In short, the best choice depends on your current speed, your ISP’s compatibility list, and whether you want a simple replacement or a modem that can keep up with future upgrades.