Best Modem Router Combos

The ARRIS SURFboard G54 is our first choice for an integrated cable gateway, provided your ISP approves its exact model and service tier: it combines DOCSIS 3.1, Wi-Fi 7 and a 10 Gbps Ethernet port. Choose the Netgear CAX80 for a Wi-Fi 6 option with multi-gig LAN, or the CAX30S when gigabit Ethernet meets your needs.

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Quick picks and comparison

All have DOCSIS 3.1 modems and lack cable voice support, according to their linked maker pages. Wi-Fi classes add advertised radio rates; they are not the throughput of one device or your approved cable plan. NETGEAR's manual explicitly warns that conditions and network overhead reduce throughput.

Check activation, download, upload and voice separately

Checked November 2, 2026. This matrix distinguishes provider evidence from maker compatibility claims. “Unconfirmed” means we have not established approval; it does not mean the provider rejects the device.

Sources: Cox's certified list, including its published page data, and the maker pages above. Cox says compatible-modem uploads can vary with network capacity and location; its list does not assign these gateways individual upload ceilings. Ask for the upload provisioned at your address.

For Xfinity, use My Device Info, entering your address or signing in. The fetched checker returned a loading screen, so we do not substitute NETGEAR's marketing speeds for provider-approved speeds. Xfinity's enhanced-speed guidance says only selected retail devices qualify for faster uploads and customer-owned modems are not currently compatible with X-Class speeds.

For Spectrum, open the authorized-modem list in your browser and confirm your exact service. Its fetched page did not expose the model list. Until you confirm both directions, treat every Spectrum cell above as unresolved. A maker's compatibility logo cannot establish your plan's upload eligibility.

• Yes: Cox: G54 is listed for up to 2 Gig; CAX80 and CAX30 appear in the 1 Gig group
• Partly: CAX30S: resolve the bundle suffix against the provider's exact device entry
• Partly: Xfinity and Spectrum: obtain exact-model, plan and upload approval before ordering
• No: Cable voice: none of these gateways supplies that service

Best overall with ISP approval: ARRIS SURFboard G54

The G54 is the strongest specification-based choice here: Wi-Fi 7 and a 10 Gbps Ethernet connection, with Cox approval up to 2 Gig. Its other four Ethernet ports are gigabit. If you want a multi-gig desktop and NAS connected simultaneously, budget for a suitable switch or consider separate equipment.

Read the speed conflict before buying. ARRIS's feature list recommends cable plans up to 2.5 Gbps, but its technical-specification block says up to 10 Gbps. Neither overrides your provider's activation list. The 10 Gbps Ethernet socket is a port rating, not evidence of a 10 Gbps cable subscription.

Firmware caveat: ARRIS documents a single-SSID mixed-security interoperability issue affecting some 6 GHz clients. Its workaround is Split Mode with WPA3 on 6 GHz. Ask support whether your provider's firmware contains a fix before depending on a shared network name. See the G54 at ARRIS.

Best Wi-Fi 6 option with multi-gig LAN: Netgear CAX80

The CAX80 specifications list dual-band AX6000 Wi-Fi, with 4×4 radios and 160 MHz channels on 5 GHz. It has one 2.5 Gbps Ethernet port alongside four gigabit LAN ports, plus USB 3.0 storage connectivity.

Choose it when that radio and port combination fits your devices. Do not choose it for Cox 2 Gig: Cox's 1 Gig group includes CAX80 despite its faster Ethernet port. Likewise, NETGEAR's broad DOCSIS speed headline cannot prove enhanced-upload eligibility at Xfinity. See the CAX80 at NETGEAR.

Best for gigabit Ethernet needs: Netgear CAX30S

The CAX30S has dual-band AX2700 Wi-Fi, 3×3 radios and 80 MHz channels on 5 GHz. Its four LAN ports are gigabit; there is no 2.5 Gbps port. Choose it only if you do not need a faster individual wired connection.

CAX30 versus CAX30S: the S package includes 90 days of NETGEAR Armor, and its product page links the CAX30 manual. Do not interpret the subscription bundle as an upgraded modem. Cox names CAX30, so have the provider resolve the package's model before purchase.

There is another official-page inconsistency: a compatibility paragraph says “Wireless router not included,” while the title and AX2700 technical specifications describe an integrated modem router. Those model-specific specifications underpin this pick. See the CAX30S at NETGEAR.

One box, bridge mode, or separate boxes?

The G54's documented modes show why a port's role matters. In normal cable operation, coax feeds its modem, and its routing, Wi-Fi and Ethernet serve the home. Bridge mode disables its routing and Wi-Fi; connect your own router's WAN/internet socket to the modem's Ethernet output, then put home devices behind that router.

In G54 router-only mode, the modem function is disabled and the 10 Gbps port becomes the Ethernet internet input from an external modem or fiber ONT. The four remaining gigabit sockets serve wired home devices. That is a different mode from bridging.

Tap a label to explore. You can also hover or use your keyboard.

01Integrated gateway+

The cable modem and Wi-Fi router operate in the G54 enclosure; Ethernet connects home devices.

Sources: 1: G54 integrates a cable modem and Wi-Fi router, with one 10 Gbps and four gigabit Ethernet ports.

Signal path

Coax → built-in modem → routing → Wi-Fi / LAN

Ethernet role

Home-network output

02Bridge to a separate router+

G54 bridge mode disables its routing and wireless functions. A separate Wi-Fi router serves the home.

Sources: 2: G54 bridge mode disables its router and wireless functions and requires a separate router for multiple home devices.

Signal path

Coax → G54 modem → Ethernet → separate router

Ethernet role

Modem output to the separate router's WAN input

03Reuse as an Ethernet router+

Router-only mode disables the G54 modem. Its 10 Gbps socket receives the internet connection from an external modem or ONT.

Sources: 3: G54 router mode disables its modem function and accepts the external modem connection on its 10G port.

Signal path

External modem / ONT → G54 routing → Wi-Fi / LAN

Ethernet role

10 Gbps socket is WAN; other sockets remain gigabit LAN

Full comparison table

Swipe to compare; option labels stay visible →

Follow the signal through the G54

Option	Signal path	Ethernet role
01Integrated gateway+ The cable modem and Wi-Fi router operate in the G54 enclosure; Ethernet connects home devices. Sources: 1: G54 integrates a cable modem and Wi-Fi router, with one 10 Gbps and four gigabit Ethernet ports.	Coax → built-in modem → routing → Wi-Fi / LAN	Home-network output
02Bridge to a separate router+ G54 bridge mode disables its routing and wireless functions. A separate Wi-Fi router serves the home. Sources: 2: G54 bridge mode disables its router and wireless functions and requires a separate router for multiple home devices.	Coax → G54 modem → Ethernet → separate router	Modem output to the separate router's WAN input
03Reuse as an Ethernet router+ Router-only mode disables the G54 modem. Its 10 Gbps socket receives the internet connection from an external modem or ONT. Sources: 3: G54 router mode disables its modem function and accepts the external modem connection on its 10G port.	External modem / ONT → G54 routing → Wi-Fi / LAN	10 Gbps socket is WAN; other sockets remain gigabit LAN

Follow the signal through the G54

Option	Signal path	Ethernet role
01Integrated gateway+ The cable modem and Wi-Fi router operate in the G54 enclosure; Ethernet connects home devices. Sources: 1: G54 integrates a cable modem and Wi-Fi router, with one 10 Gbps and four gigabit Ethernet ports.	Coax → built-in modem → routing → Wi-Fi / LAN	Home-network output
02Bridge to a separate router+ G54 bridge mode disables its routing and wireless functions. A separate Wi-Fi router serves the home. Sources: 2: G54 bridge mode disables its router and wireless functions and requires a separate router for multiple home devices.	Coax → G54 modem → Ethernet → separate router	Modem output to the separate router's WAN input
03Reuse as an Ethernet router+ Router-only mode disables the G54 modem. Its 10 Gbps socket receives the internet connection from an external modem or ONT. Sources: 3: G54 router mode disables its modem function and accepts the external modem connection on its 10G port.	External modem / ONT → G54 routing → Wi-Fi / LAN	10 Gbps socket is WAN; other sockets remain gigabit LAN

Source notes3 references+

1. 1

   G54 integrates a cable modem and Wi-Fi router, with one 10 Gbps and four gigabit Ethernet ports.

   www.surfboard.com ↗ — source for G54 integrates a cable modem and Wi-Fi router, with one 10 Gbps and four gigabit Ethernet ports.

   With a 10 Gbps Ethernet port plus four 1-Gigabit Ethernet ports, built-in BE18000 Wi-Fi 7 and a DOCSIS® 3.1 Cable Modem

2. 2

   G54 bridge mode disables its router and wireless functions and requires a separate router for multiple home devices.

   arris.my.salesforce-sites.com ↗ — source for G54 bridge mode disables its router and wireless functions and requires a separate router for multiple home devices.

   Setting the G54 in Bridge mode disables the router and wireless functions and will operate as a cable modem.

3. 3

   G54 router mode disables its modem function and accepts the external modem connection on its 10G port.

   arris.my.salesforce-sites.com ↗ — source for G54 router mode disables its modem function and accepts the external modem connection on its 10G port.

   Setting the G54 in Router mode disables the modem functions and will operate as a Wi-Fi router. A modem with an Internet connection will need to be connected to the 10G Ethernet port on the G54.

Check the model manual before changing another gateway. See modem versus router.

A separate-box parts list: an ISP-approved Netgear CM3000 modem, an ASUS RT-BE92U router and an Ethernet cable between them. NETGEAR specifies a 2.5 Gbps modem port and says a separate Wi-Fi router is required; ASUS lists a 10 Gbps WAN/LAN port. Assign that ASUS socket to WAN for the modem connection. You can then replace the router independently.

Compare alternatives in best cable modems and best Wi-Fi 7 routers.

Firmware responsibility, support dates and FCC status

NETGEAR's firmware guidance distinguishes ISP-delivered cable firmware from the separate router firmware on CAX models. Its End of Service policy generally ends updates three years after the last sale date; that is not a model-specific support deadline measured from your purchase.

ARRIS says providers qualify, test and distribute cable-device firmware. For G54, find the Software Image Name using its version-lookup instructions and ask your ISP whether it is the approved release. These ARRIS sources provide no dated G54 support-end commitment.

The FCC's October 21, 2026 list explicitly covers NETGEAR CAX-series cable gateways through October 1, 2027. Its Vantiva entry names CWA438TX; do not transfer that entry to G54. This is separate from existing-model sales: the FCC fact sheet says previously authorized existing models can still be imported, sold and used. See our FCC router-rule explainer.

How we choose

We rank documented gateways by provider eligibility, Ethernet bottlenecks, Wi-Fi capabilities and upgrade options. Sources are the makers' specifications, manuals and support guidance, Cox's provider list, Xfinity's service guidance and FCC documents. Missing provider evidence stays explicit. These are research-based recommendations, with no measured coverage, latency or throughput results. See How we choose.

Before ordering and activating

1. 1

   Match the label

   Confirm the exact model, bundle suffix, service address, download tier, upload tier and any cable-phone requirement with your ISP.

2. 2

   Check the connection path

   Decide whether the gateway will handle Wi-Fi or feed a separate router. Confirm the socket roles in that mode.

3. 3

   Prepare activation

   For G54, ARRIS says to connect coax and the supplied power adapter; if self-activation fails, give the provider its HFC MAC address and serial number.

The activation details come from ARRIS's G54 installation instructions. Keep your current equipment available until the replacement has been activated and its subscribed upload and download service confirmed.

Verdict

Start with the G54 for its Wi-Fi 7 and faster Ethernet capability. Choose CAX80 for the documented Wi-Fi 6/multi-gig combination, or CAX30S for gigabit wired needs. Order only after the exact gateway clears your provider's activation and upload checks.