---
product_id: 8319364
title: "NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS)"
brand: "netgear"
price: "€ 141.49"
currency: EUR
in_stock: true
reviews_count: 9
category: "Netgear"
url: https://www.desertcart.gr/products/8319364-netgear-cable-modem-cm400-compatible-with-cable-providers-xfinity-by
store_origin: GR
region: Greece
---

# Up to 340 Mbps speed 1 Gigabit Ethernet port 8x4 DOCSIS 3.0 channel bonding NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS)

**Brand:** netgear
**Price:** € 141.49
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your internet game—ditch rentals, boost speed, and stream like a pro!

## Quick Answers

- **What is this?** NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS) by netgear
- **How much does it cost?** € 141.49 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/8319364-netgear-cable-modem-cm400-compatible-with-cable-providers-xfinity-by)

## Best For

- netgear enthusiasts

## Why This Product

- Trusted netgear brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Blazing Fast Speeds:** Experience lightning-fast downloads up to 340 Mbps—perfect for HD streaming and gaming without lag.
- • **Save Big on Rentals:** Cut out costly monthly modem rental fees and save up to $156 annually—own your internet setup.
- • **Plug & Play Simplicity:** Easy installation with auto-sensing Gigabit Ethernet port—get online faster and stay connected reliably.
- • **Next-Gen DOCSIS 3.0 Tech:** 8x4 channel bonding delivers 8 times faster speeds than older modems, future-proofing your connection.
- • **Seamless Provider Compatibility:** Works flawlessly with top cable providers like Xfinity, Spectrum, and Cox for hassle-free setup.

## Overview

The NETGEAR CM400 is a DOCSIS 3.0 certified cable modem delivering up to 340 Mbps download speeds via 8x4 channel bonding. Compatible with major U.S. cable providers including Xfinity, Spectrum, and Cox, it features a single auto-sensing Gigabit Ethernet port and eliminates monthly rental fees, making it an ideal choice for HD streaming, gaming, and fast downloads. Note: Requires a separate router for WiFi.

## Description

The NETGEAR CM400 High Speed Cable Modem provides a connection to high-speed cable Internet, up to 340Mbps. It is Cable Labs certified and with DOCSIS 3. 0 is 8X faster than 2. 0. It is compatible with U. S. cable Internet providers like Cablevision, Cox, Time Warner Cable, XFINITY & more.

Review: Stonger connection - Greate ,Cheap , easy to set up , and works perfect ! Perfect modem if you use Internet on your ps4 or phone and want a stonger connection for multiple devices . Has 3 total wires in the box it comes in. I baught this not realizing it didnt come with built in wifi connection, i still needed to hook up to a wifi modem, it still was perfect since I had a wifi mode already. It was good deal i couldn't pass up ! It connected cox internet service perfectly - Has normal modem issues that you normally expect once in a blue moon , always a common thing when dealing with technology , you can restart the box and the connection will be fixed. 2 months now and still going strong . Update: still runs perfectly one year later !! Hope this helped anyone !
Review: Simple & Reliable - The CM400 is primarily a simple device to install. Due to the restrictions placed on us by the cable provider, i.e. firmware updates, a particular downstream channel frequency and the like, there is however only one controlling feature for us to modify. Compared to the many other units I've used this cable modem does allow us to at least find a starting frequency then locking into a channel best suited to my custom router/networking needs. It does take a few extra tries to find that one frequency I'm looking for, that's the one controlling feature I like that Netgear gives us. My regional cable provider is not always in alignment to my speed freakish needs limited to 110Mbps. :<(' The CM400 is a very reliable and sound unit. Bought April 2017, over a year of quality service.

## Features

- ELIMINATE MONTHLY CABLE MODEM RENTAL FEES - Up to $156 per year
- DOCSIS 3. 0 Cable Modem with 1 Gigabit Ethernet port. One (1) Gigabit Ethernet port with auto-sensing technology
- Up to 340Mbps download and upload speed. Separate router required for WiFi. 8x4 channel bonding.
- DOCSIS 3. 0 unleashes 8x faster download speeds than DOCSIS 2. 0
- Ideal for streaming HD videos, faster downloads, and high-speed online gaming
- Required for the fastest cable Internet speed tiers
- Compatible with Xfinity from Comcast, Spectrum, Cox, & more. Not compatible with bundled voice services.
- Memory storage capacity: 64.0 MB

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00MN2EUEA |
| Batteries | 1 AAA batteries required. |
| Best Sellers Rank | #20,565 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #83 in Computer Networking Modems |
| Brand | NETGEAR |
| Color | Black |
| Customer Reviews | 4.2 4.2 out of 5 stars (1,572) |
| Date First Available | August 11, 2014 |
| Flash Memory Size | 8 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 8.55 x 7.17 x 2.05 inches |
| Item Weight | 1.08 pounds |
| Item model number | CM400-100NAS |
| Manufacturer | Netgear |
| Operating System | Microsoft Windows 7, 8, Vista, XP, 2000, Mac OS, or other operating systems running a TCP/IP network |
| Product Dimensions | 8.55 x 7.17 x 2.05 inches |
| RAM | 64 MB |
| Series | CM400 |
| Wireless Type | 802.11bgn |

## Product Details

- **Antenna Type:** Fixed
- **Brand:** NETGEAR
- **Color:** Black
- **Compatible Devices:** Router
- **Connectivity Technology:** Ethernet
- **Frequency Band Class:** Single-Band
- **Included Components:** Computer Modems
- **Item Weight:** 1.1 Pounds
- **Model Name:** CM400
- **Wireless Communication Standard:** 802.11bgn

## Images

![NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | for Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS) - Image 1](https://m.media-amazon.com/images/I/71+uQDKIAxL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Stonger connection
*by K***Y on August 8, 2016*

Greate ,Cheap , easy to set up , and works perfect ! Perfect modem if you use Internet on your ps4 or phone and want a stonger connection for multiple devices . Has 3 total wires in the box it comes in. I baught this not realizing it didnt come with built in wifi connection, i still needed to hook up to a wifi modem, it still was perfect since I had a wifi mode already. It was good deal i couldn't pass up ! It connected cox internet service perfectly - Has normal modem issues that you normally expect once in a blue moon , always a common thing when dealing with technology , you can restart the box and the connection will be fixed. 2 months now and still going strong . Update: still runs perfectly one year later !! Hope this helped anyone !

### ⭐⭐⭐⭐⭐ Simple & Reliable
*by B***3 on April 22, 2018*

The CM400 is primarily a simple device to install. Due to the restrictions placed on us by the cable provider, i.e. firmware updates, a particular downstream channel frequency and the like, there is however only one controlling feature for us to modify. Compared to the many other units I've used this cable modem does allow us to at least find a starting frequency then locking into a channel best suited to my custom router/networking needs. It does take a few extra tries to find that one frequency I'm looking for, that's the one controlling feature I like that Netgear gives us. My regional cable provider is not always in alignment to my speed freakish needs limited to 110Mbps. :<(' The CM400 is a very reliable and sound unit. Bought April 2017, over a year of quality service.

### ⭐⭐⭐⭐ Works great, set it up its pretty easy
*by P***O on December 22, 2015*

I bought this modem 3 weeks ago, and since then I haven't had no issues whatsoever, I got the same speed as the modem that Time Warner Cable had gave me , no complaints yet. I got 103 Mbps on the download, and almost 10 Mbps upload which I don't care about to much. Works great, set it up its pretty easy , just call your cable company to register the ESN and that's it . If after that you don't have Internet service call Netgear they will help set it up as well.

## Frequently Bought Together

- NETGEAR Cable Modem CM400 Compatible with Cable Providers Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 100 Mbps | DOCSIS3.0, Black (CM400-100NAS)
- NETGEAR 4-Stream WiFi 6 Router (R6700AX) – Security Features, AX1800 Wireless Speed (Up to 1.8 Gbps), Covers up to 1,500 sq. ft., 20 devices
- NETGEAR Nighthawk Dual-Band WiFi 7 Router (RS90) – Security Features, BE3600 Wireless Speed (up to 3.6 Gbps) - Covers up to 2,000 sq. ft., 50 Devices – 2.5 Gig Internet Port

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-24*