NETGEAR Nighthawk CAX30 Cable Modem WiFi 6 Router
- DOCSIS 3.1 cable modem plus WiFi 6 router in one
- AX2700 dual-band, 6 stream WiFi
- Up to 2,000 sq ft, 25+ connected devices
- 4 Gigabit Ethernet ports, 2 aggregate to 2 Gbps
- Xfinity up to 800Mbps, Spectrum and Cox up to 1Gbps
- Not for Verizon, AT&T, CenturyLink, DirecTV or DISH
- 1 USB 3.0 port
- WPA3 encryption, firewall and DoS prevention
Last refreshed Sep 23, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
The Nighthawk combo suits cable subscribers on Xfinity, Spectrum or Cox who want one box for modem and WiFi. It is not compatible with Verizon, AT&T and several other providers, so check your service first.
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ASIN: B0D6GZDYS3Model: CAX30-200NASCategory: Modem Router Combos
Overview
A cable internet subscriber gets the modem and the WiFi router in a single NETGEAR Nighthawk box. Setup runs through the Nighthawk app or a web browser, and the internet provider activates the modem afterward.
Combining the modem and dual-band WiFi in one device simplifies the setup, and the wired ports with link aggregation serve desktops and consoles. Provider support is limited to the cable plans named in the listing, with a lower plan ceiling on Xfinity.
Who it's for
Busy homes with many connected devices and a cable plan up to gigabit speeds get modem and WiFi in one place. Households on other provider types, or with cable phone service, need a different device.
Pros and cons
- Modem and router in one box
- Link aggregation on two Ethernet ports
- Encryption, firewall and attack prevention built in
- App or browser setup and control
- Not compatible with bundled voice plans
- Several major providers unsupported
- Dual-band only, no third band
- Armor is an optional add-on after trial
Performance notes
Wired speed is governed by your cable plan and how busy the provider's network is at peak hours, and OFDMA in the modem aims to steady speeds during that congestion. WiFi reach depends on placement, since the internal antennas radiate from wherever the box stands, and a central spot serves more rooms.
Where it stands among modem router combos
- #5 most-searched brand and model of the 31 modem router combos lines we track (by search demand, not sales).
From the specs of the 25 modem router combos we list; not a test result.
Specifications
| Brand | NETGEAR |
|---|---|
| Model | CAX30-200NAS |
| Power & efficiency | |
| Voltage | 12 volts |
| Construction & materials | |
| Color | Black |
| Compatibility & installation | |
| Incompatible services | Verizon, AT&T, CenturyLink, DirecTV, DISH, Bundled Voice Plans |
| Isp compatibility | Xfinity up to 800Mbps, Spectrum up to 1Gbps, Cox up to 1Gbps |
| Warranty & support | |
| Warranty description | 1 year |
| Other details | |
| Data transfer rate | AX2700, 2.7 Gbps |
| Wi-Fi generation | WiFi 6 |
| Ethernet ports | 4 Gigabit |
| Security protocol | WPA, WPA2, WPA3 |
| Number of antennas | 4 |
| Control type | App |
| Device type | DOCSIS 3.1 cable modem and WiFi 6 router |
| Frequency band class | Dual-Band |
| USB ports | 1 USB 3.0 |
| Coverage | Up to 2,000 sq ft |
| Wireless compability | 802.11ax |
| Link aggregation | Two ports up to 2 Gbps |
| Max connected devices | 25+ |
Closest rivals on specs
ARRIS SBG10 Cable Modem Router Combo AC1600- Warranty description 1 vs 2 years (-50%)
- Voltage 12 vs 120 volts (-90%)
Frequently asked questions
How do I set up the NETGEAR CAX30?
Connect it to your cable line, then set it up with the free NETGEAR Nighthawk app on iOS or Android, or in any web browser. Your ISP must activate it after setup.
Can the CAX30 handle cable phone service?
No. The listing says it is not compatible with bundled voice plans.
What comes in the box with the NETGEAR CAX30?
The CAX30 modem router, an Ethernet cable, a power adapter and a quick start guide.
Is NETGEAR Armor included with the CAX30?
Armor is included as an optional upgrade with a 30-day free trial.