Spectrum-Approved Modems in 2025: What Actually Works (and What to Avoid)
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NETGEAR Nighthawk CAX80 | DOCSIS 3.1 Cable Modem + Wi-Fi 6 Router
The NETGEAR Nighthawk CAX80 combines a DOCSIS 3.1 cable modem with a Wi-Fi 6 (AX6000) router for fast, reliable whole-home internet—ideal for gaming, 4K/8K streaming, and busy households. Works with major cable providers and helps you eliminate monthly equipment rental fees.
Key Features
- DOCSIS 3.1 with 32×8 channel bonding for multi-gig-class cable connectivity (plan/ISP dependent)
- Wi-Fi 6 (AX6000) dual-band wireless performance with coverage up to ~3,000 sq ft
- 2.5 GbE WAN/LAN port + 4× Gigabit LAN for high-speed wired devices
- USB 3.0 port for storage/printer sharing
- NETGEAR Armor security (optional subscription) and WPA/WPA2
- Own your gateway to avoid rental fees (often ~$10–$15/mo)
Compatibility
Compatible with most plans from major U.S. cable ISPs:
- Comcast Xfinity
- Spectrum (Charter)
- Cox
Not compatible with Verizon/AT&T/CenturyLink (fiber/DSL), satellite providers, or bundled voice/eMTA services. Always confirm device eligibility and maximum supported speed for your exact plan/region with your ISP.
Performance
- Wi-Fi: AX6000 dual-band (up to 6 Gbps wireless aggregate under ideal conditions)
- Cable: DOCSIS 3.1 (backward compatible with DOCSIS 3.0)
- Ports: 1× 2.5 GbE, 4× 1 GbE, 1× USB 3.0
Technical Specifications
| Brand / Model | NETGEAR Nighthawk CAX80 |
|---|---|
| DOCSIS | 3.1 (OFDM), 32×8 DOCSIS 3.0 backward compatible |
| Wireless | Wi-Fi 6 (AX6000), dual-band |
| Ethernet | 1 × 2.5 GbE (WAN/LAN), 4 × 1 GbE LAN |
| USB | 1 × USB 3.0 |
| Security | WPA/WPA2, NETGEAR Armor (optional) |
| Coverage | Up to ~3,000 sq ft (environment dependent) |
What’s Included
- NETGEAR Nighthawk CAX80 Cable Modem Router
- Ethernet Cable
- Power Adapter
- Quick Start Guide / Online Installation Manual
Quick Setup
- Connect coax, then power.
- Plug your device/router into the 2.5 GbE (or a Gigabit) port.
- Activate with your cable provider via app/portal or support line.
- Use the Nighthawk app to finish Wi-Fi setup and security.
FAQ
Will this work with my internet company?
Yes for most Xfinity/Spectrum/Cox plans. Check your exact tier and region with your ISP.
Does it support phone/voice lines?
No. For telephony (eMTA), choose a gateway that supports voice service.
How fast is it?
Wireless up to AX6000 (aggregate). Cable throughput depends on your DOCSIS plan and network conditions.
Speeds/coverage are theoretical and vary by ISP plan, network load, home layout, and client device capabilities.
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