Amazon Renewed
NETGEAR Nighthawk WiFi 6Cable Modem Router CAX30-100NAR Compatible with Xfinity
Bottom line: The Amazon Renewed NETGEAR Nighthawk WiFi 6Cable Modem Router CAX30-100NAR: AX2700 WiFi 6 covers 2,500 sq ft and 25 concurrent devices; main trade-off: renewed unit, not new: cosmetic wear and shorter coverage than retail.
As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →
Pros & Cons
Pros
- ✓ AX2700 WiFi 6 covers 2,500 sq ft and 25 concurrent devices
- ✓ Four 1-Gig Ethernet ports with port aggregation support
- ✓ DOCSIS 3.1 with 32x8 channel bonding, certified up to 1Gbps on Spectrum and Cox
- ✓ USB 3.0 port for attached storage, plus WPA3 security support
Cons
- ✗ Renewed unit, not new: cosmetic wear and shorter coverage than retail
- ✗ Cable-only: no Verizon, AT&T, CenturyLink, DSL, DirecTV, or DISH support
- ✗ No bundled voice service, so cable phone lines will not work
- ✗ Xfinity certification caps at 800Mbps, below the 2Gbps hardware ceiling
Manufacturer description
The NETGEAR Nighthawk CAX30 combines a DOCSIS 3.1 cable modem and a dual-band WiFi 6 router in one unit, so you can drop the monthly rental box your provider charges for. AX2700 dual-band WiFi 6 covers up to 2,500 square feet and handles 25 concurrent devices, with combined speeds up to 2.7Gbps for 4K streaming, gaming, and video calls happening at once. On the wired side you get four 1-Gig Ethernet ports with port aggregation support plus a USB 3.0 port for a storage drive, console, or desktop. The 32x8 channel bonding DOCSIS 3.1 modem is certified with Spectrum and Cox up to 1Gbps and…
SpecPicks Verdict
SpecPicks scored Amazon Renewed NETGEAR Nighthawk WiFi 6Cable Modem Router CAX30-100NAR using a rating × review-volume × price-fit model applied to published specs and reviews across the networking category. Amazon Renewed's networking lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for networking of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Will this modem work with my internet provider?
It is certified with Spectrum and Cox up to 1Gbps and Xfinity up to 800Mbps. It does not work with Verizon, AT&T, CenturyLink, DSL providers, DirecTV, DISH, or any bundled voice service.
Do I still need a separate router?
No. The CAX30 is a combo unit with a DOCSIS 3.1 cable modem and a dual-band WiFi 6 router built in, so it replaces both boxes.
How much WiFi coverage does it actually give me?
NETGEAR rates it for up to 2,500 square feet and 25 concurrent devices on AX2700 dual-band WiFi 6, with combined speeds up to 2.7Gbps.
What does Renewed mean for this listing?
This is an Amazon Renewed CAX30-100NAR, meaning a professionally inspected pre-owned unit rather than new retail. Check the product listing for the current Renewed guarantee terms.
Is it worth buying instead of renting from my cable company?
NETGEAR estimates you save on rental fees, so the unit can pay for itself.
Key Features
- Compatible with all major cable internet providers with internet speed up to 2Gbps. Currently certified with Spectrum and Cox (up to 1Gbps) and Xfinity (up to 800Mbps). Future speeds with these service providers may change over time. Not compatible with Verizon, AT&T, CenturyLink, DSL providers, DirecTV, DISH and any bundled voice service
- Coverage up to 2,500 sq. ft. and 25 concurrent devices with dual-band WiFi 6 (AX2700) speed (up to 2.7Gbps)
- 4 X 1 Gig Ethernet ports (supports port aggregation) and 1 USB 3.0 port for computers, game consoles, streaming players, storage drive, and other wired devices
- Sets up easily with the Nighthawk app – easily manage WiFi settings at the device and network level, test internet speed and monitor data usage
- DOCSIS 3.1 and 32x8 channel bonding
- Replaces your cable modem and WiFi router. Save up to $168/yr in equipment rental fees
Full Specifications
| Brand | NETGEAR |
|---|---|
| Color | Black |
| Voltage | 100240 volts |
| Coverage | 2500 sq. ft. |
| Frequency | 5 GHz |
| Model Name | NETCAX30100NARRB |
| Unit Count | 1 Count |
| Antenna Type | Internal |
| Connectivity | Wireless, USB, WiFi |
| Model Number | CAX30-100NAS-cr |
| Built-In Media | Nighthawk AX6/6-Stream WiFi 6 Cable Modem Router, Ethernet cable, Quick start guide, Power adapter |
| Control Method | Touch |
| Connection Type | Wired |
| Mfr Part Number | CAX30-100NAS-cr |
| Number of Items | 1 |
| Number of Ports | 3 |
| Antenna Location | Home |
| Wi-Fi Generation | Wi-Fi 6 |
| Security Protocol | WPA3 |
| Compatible Devices | Laptop, Personal Computer, Smartphone, Tablet |
| Full listing title | NETGEAR Nighthawk WiFi 6Cable Modem Router CAX30-100NAR Compatible with Xfinity, Spectrum, and Cox, AX2700 (Up to 2.7Gbps) DOCSIS 3.1 (Renewed) |
Ready to buy?
NETGEAR Nighthawk WiFi 6Cable Modem Router CAX30-100NAR Compatible with Xfinity, Spectrum, and Cox, AX2700 (Up to 2.7Gbps) DOCSIS 3.1 (Renewed) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
Related Networking
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- Best 1440p Gaming GPUs in 2026
- Best Retro Handhelds in 2026 — From $35 to $500
- How to Build a Windows 98 Retro PC in 2026
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
More reviews from the SpecPicks archive
Browse all reviews →- Sega Genesis Games Loaded Off a Vinyl Record — and What It Means for Retro Collectors
- Best AM4 CPU for Budget Gaming and Local AI in 2026
- Best 2.5" SATA SSD for Old Laptop and PC Upgrades in 2026
- Samsung 870 EVO vs Crucial BX500: Best SATA SSD 2026
- Best DualSense and PC-Compatible Controller (2026)
- Logitech G29 vs HORI Force Feedback Wheel for Sim-Racing Beginners
- Best CPU for a Budget AI + Gaming Rig: Ryzen 7 5700X vs 5800X vs 5600G
- Run Chrome's Tiny Gemini Nano AI on PC Without a GPU
- Claude Code Artifacts Just Shipped: What It Adds, and the Local Aider Alternative
- MTP (Multi-Token Prediction): 2x Faster Token Generation on AMD Strix Halo & Radeon 9700 AI Pro
- Crucial BX500 vs Samsung 870 EVO: Best SATA SSD for Game Loads
- Build a Self-Hosted AI Home Lab on a Raspberry Pi 4 8GB in 2026
- Ryzen 5 2600 vs Ryzen 9 3900X: Do 12 Cores Buy CPU-Only 8B Inference?
- How to run Llama 3.1 8B on Apple M4 Pro (2026)
- STEPLA-1 8-Bit Hardwired CPU: 74-Series Logic Explained
- Raspberry Pi Zero W vs Pi 4 for a 2026 Cyberdeck: Which Board Fits?
- Period-Correct Win98 Build in 2026: CompactFlash, Drivers, Glide
- Voodoo 5 6000 Lab Method: Two Motherboards, One Dead BIOS
- Count Anything Runs Locally on a 12GB GPU: Object-Counting AI on the RTX 3060
- Qwen3.6-27B on Dual RTX 3060 12GB: The $400 30-50 tok/s Local LLM Build
- vLLM vs llama.cpp for Single-User Local Chat on a 12GB GPU
- Qwen3.6-35B-A3B on an 8GB Laptop: What the Krasis Benchmark Means for Local Inference
- Best SATA SSDs for Older PCs and Retro Builds in 2026
- Best Streaming Kit for New Creators in 2026
Earliest SpecPicks reviews
Browse full archive →- Best GPU for Llama 3.1 8B (2026)
- Best GPU for Qwen 3 14B (2026)
- Best GPU for Qwen 3 32B (2026)
- Best GPU for Llama 3.1 70B (2026)
- Best GPU for DeepSeek-R1 32B (2026)
- Best GPU for Llama 3.1 405B (2026)
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 14B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 70B on NVIDIA GeForce RTX 5090
- How to run DeepSeek-R1 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 4090