Cox Approved Modem List 2026: Cox-Certified Modems That Work
The full Cox approved modem list for 2026. See every Cox-certified DOCSIS 3.1 modem and gateway, which one fits your plan, and how to activate it.
The Greenwave C4000BG is a high-performance bonded DSL modem and Wi-Fi 6 router combo designed for homes that rely on ADSL2+ or VDSL internet service. It combines fast, modern wireless technology with stable bonded DSL support, making it an excellent upgrade from older DSL gateways.
With dual-band Wi-Fi 6 (802.11ax), the C4000BG delivers stronger coverage, lower latency, and better performance for households with multiple connected devices. It is well-suited for streaming, remote work, online gaming, and smart home environments.
Built-in bonded ADSL2+ and VDSL2 modem
Wi-Fi 6 (802.11ax) dual-band wireless
Improved speed, range, and device handling vs. Wi-Fi 5 routers
Designed for DSL customers who want modern wireless performance
All-in-one modem and router (no separate devices required)
Wireless Standard: Wi-Fi 6 (802.11ax), backward compatible with 802.11a/b/g/n/ac
Bands: Dual-band 2.4 GHz + 5 GHz
Maximum Wireless Speeds:
Up to ~600 Mbps on 2.4 GHz
Up to ~2400 Mbps on 5 GHz
Supports advanced Wi-Fi 6 features including OFDMA, beamforming, and high-efficiency modulation for better performance with many devices connected at once
Ethernet Ports:
4 × Gigabit LAN ports for wired devices
Ideal for desktops, gaming consoles, smart TVs, and network switches
DSL Technologies Supported:
ADSL2+
VDSL2 (bonded pair support)
Designed for bonded DSL lines to provide improved speed and stability over single-line DSL connections
WPA3 wireless security support
IPv4 and IPv6 compatible
Built-in firewall and standard routing features
Smart band steering to automatically connect devices to the optimal Wi-Fi band
The Greenwave C4000BG is intended for DSL internet service only and is commonly used with CenturyLink DSL, Brightspeed DSL & other providers offering ADSL2+ or VDSL2 bonded service.
This modem does NOT support cable, fiber, or fixed wireless services. Always confirm compatibility with your internet provider and service type before purchasing.
The full Cox approved modem list for 2026. See every Cox-certified DOCSIS 3.1 modem and gateway, which one fits your plan, and how to activate it.
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