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NETGEAR CM500-100NAR DOCSIS 3.0 Cable Modem with 16x4 Max Download speeds of 680Mbps. Certified for XFINITY by Comcast, Time Warner Cable, Cox, Charter & More(Renewed)

3.9 3.9 out of 5 stars 755 ratings

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This product has sustainability features recognized by trusted certifications.

Pre-owned

Products are inspected, cleaned and (if applicable) repaired to excellent functional standards. Buying Pre-owned extends a product's life, reducing e-waste and raw material extraction.

As certified by
Pre-owned Certified: Electronics Pre-owned Certified: Electronics

Pre-owned Certified products are inspected, cleaned and (if applicable) repaired to excellent functional standards. By purchasing Pre-owned Certified rather than new, customers can extend the life of the product, reduce electronic waste, and reduce the extraction of raw materials. These products are backed by the Amazon Renewed Guarantee. Pre-owned Certified is part of the Climate Pledge Friendly program that helps you discover and shop for more-sustainable products.

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This product is inspected, tested, and refurbished, as necessary to be fully functional according to Amazon Renewed standards.
Brand NETGEAR
Internet service provider spectrum, optimum, cox, xfinity
Compatible Devices Personal Computer
Product Dimensions 4.88"L x 2.36"W x 7.28"H
Total Ethernet Ports 1

About this item

  • NETGEAR Certified Refurbished product is manufacturer refurbished to work and look as new with 90 Day Warranty and email support. All accessories are included with limited documentation and additional information online. Netgear recommends to update the firmware for the device to be up to date.
  • Eliminate monthly cable modem rental fee's ($120 or more a year). This device is a cable modem with no WiFi built-in.
  • DOCSIS 3.0 Cable Modem with 1 Gigabit Ethernet port.
  • Up to 680Mbps download and upload speed. Separate router required for WiFi. 16x4 channel bonding
  • NETGEAR Refurbished product may have a removed serial number. You will need to state the product is refurbished (state the full part number) if emailing customer support. See the attached (image) flyer to obtain the Serial Number and MAC Address information that maybe needed by your Cable provider before contacting them.
  • Please refer to the attachments in the Technical Specification section of the detail page for troubleshooting and FAQs.
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All products have been professionally inspected, tested, cleaned, and refurbished as necessary by Amazon-qualified suppliers.

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All Amazon Renewed purchases will come with accessories equivalent to those that shipped in the box when new. These items may not be original but will be compatible and fully functional. Amazon Renewed products will be packaged in either original packaging or in a new and clean cardboard box.

Model Year

2018

In what condition can I expect my Amazon Renewed product to be?

Product will be restored to its original factory settings and will be in one of the following cosmetic conditions Premium, Excellent, Good or Acceptable. Learn more
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NETGEAR CM500-100NAR DOCSIS 3.0 Cable Modem with 16x4 Max Download speeds of 680Mbps. Certified for XFINITY by Comcast, Time Warner Cable, Cox, Charter & More(Renewed)
NETGEAR CM500-100NAR DOCSIS 3.0 Cable Modem with 16x4 Max Download speeds of 680Mbps. Certified for XFINITY by Comcast, Time Warner Cable, Cox, Charter & More(Renewed)
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Price$39.95$99.99-42% $69.99
New Price:$119.99
-29% $69.99
New Price:$98.32
$77.00
Delivery
Get it as soon as Saturday, May 18
Get it as soon as Saturday, May 18
Get it as soon as Saturday, May 18
Get it as soon as Monday, May 20
Get it May 17 - 21
Customer Ratings
Easy to install
4.3
4.1
4.4
4.7
4.7
3.9
Value for money
3.4
3.4
4.3
4.0
4.2
3.6
WiFi signal
2.9
3.4
3.9
3.9
3.4
4.2
Tech Support
3.1
2.9
3.1
3.8
4.3
Sold By
Techa Distribution
Hitron Americas
Woot
NewLife Electronic Deals
Electronics Club
connectivity tech
Ethernet
Ethernet
Wi-Fi
Ethernet, Wi-Fi
ethernet ports
1
1
2
3
2
number of ports
1
2
3
7
data transfer rate
680 megabits per second
1 gigabits per second
1.4 gigabits per second
200 megabits per second
max downstream rate
343 megabits per second
960 megabits per second
1000 megabits per second
max upstream rate
123 megabits per second
960 megabits per second
350 megabits per second
500 megabits per second
modem type
cable
cable
cable
cable
cable
dsl

Product Description

The NETGEAR CM500 High speed cable modem provides a connection to high-speed cable Internet, up to 680Mbps. It is cable labs certified and with DOCSIS 3.0 is 16X faster than 2.0 devices. It works with U.S. Cable Internet provider Comcast XFINITY & more. It is not compatible with cable bundled Voice services.The product is multiple voltage compatible that voltage arrange is100-240V

What's in the box

  • cable modem
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    NETGEAR CM500-100NAR DOCSIS 3.0 Cable Modem with 16x4 Max Download speeds of 680Mbps. Certified for XFINITY by Comcast, Time Warner Cable, Cox, Charter & More(Renewed)

    NETGEAR CM500-100NAR DOCSIS 3.0 Cable Modem with 16x4 Max Download speeds of 680Mbps. Certified for XFINITY by Comcast, Time Warner Cable, Cox, Charter & More(Renewed)


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    Sustainability features

    Sustainability features

    This product has sustainability features recognized by trusted certifications.

    Pre-owned

    Products are inspected, cleaned and (if applicable) repaired to excellent functional standards. Buying Pre-owned extends a product's life, reducing e-waste and raw material extraction.

    As certified by
    Pre-owned Certified: Electronics Pre-owned Certified: Electronics

    Pre-owned Certified products are inspected, cleaned and (if applicable) repaired to excellent functional standards. By purchasing Pre-owned Certified rather than new, customers can extend the life of the product, reduce electronic waste, and reduce the extraction of raw materials. These products are backed by the Amazon Renewed Guarantee. Pre-owned Certified is part of the Climate Pledge Friendly program that helps you discover and shop for more-sustainable products.

    Learn more about this certification

    Customer reviews

    3.9 out of 5 stars
    3.9 out of 5
    755 global ratings

    Customers say

    Customers like the performance and ease of installation of the modem. For example, they mention it works well, is easy to set up, and has a quick connection. That said, opinions are mixed on value, signal strength, and speed.

    AI-generated from the text of customer reviews

    64 customers mention48 positive16 negative

    Customers like the performance of the modem. They mention that it works as expected, has no issues, and is a great product. Some say that it is one of the best modems they have owned and that Netgear is reliable brand.

    "...This is one of the best modem I have owned. I have not had one issue with it." Read more

    "...The modem works as expected, and I've had almost no problems on my side since it was activated. Good speed for streaming and regular surfing...." Read more

    "...Had it lasted out the year I'd have given it 5 stars. Netgear is a reliable brand." Read more

    "this item is a great value for the money how ever it did not work up to specs...." Read more

    15 customers mention15 positive0 negative

    Customers find the installation process of the modem to be easy. They mention that it's great for streaming and surfing, and that it works as advertised.

    "Easy to install and connect, great buy, however still awaiting the insurance that should have accompanied this product." Read more

    "Great value, quick set up, got my great wifi signal back." Read more

    "So far So good, no problems setting up, haven't had any issues so far. At this point I have no reason why I wouldn't purchase from them again...." Read more

    "Used this to replace a Comcast rented box. Installed very easily and works well. Very happy, would recommend. No issues with the refurb item." Read more

    32 customers mention21 positive11 negative

    Customers are mixed about the value of the modem. Some mention it's a great value for the money, while others say it'd be better off buying a new one.

    "this item is a great value for the money how ever it did not work up to specs...." Read more

    "...Don't waste your money. Lousy unusable interface with no configuration other than a username and password change capability." Read more

    "Good, stable docsis 3.0 modem and a good value as long as you don’t need a faster speed than it supports...." Read more

    "It does the job for the money you spent...." Read more

    22 customers mention12 positive10 negative

    Customers have mixed opinions about the speed of the modem. Some mention that it has great speed, smooth streaming, and no buffering or lag. Others however, say that they didn't get the advertised speeds, it was slow as a turtle walking, and that it didn''t support the higher internet speeds.

    "...Good speed for streaming and regular surfing. It works well with a Netgear Wifi router...." Read more

    "This modem is a docsis 3.0 so it does not support the higher internet speeds but does support up to 650 mbs which I only have 200mbs...." Read more

    "...Packaging was great, arrived quickly. No scratches or any signs of abuse. Without going overboard, so far, I'll simply say that I'm very happy." Read more

    "...after 2 hours on the phone with Cox internet support it only achieved 34mps speed vs my old Motorola SB6121 was getting around 158MPS..." Read more

    21 customers mention10 positive11 negative

    Customers are mixed about the signal strength of the modem. Some mention it's a great modem, with great wifi signal and lots of multi stream throughput. However, others say that it started breaking signal after every 5 minutes and the internet breaks down again.

    "...and registered the Netgear modem in their system but was never able to gain internet so had to return this unit unfortunately." Read more

    "Anyone new to getting their own modem this is perfect for up to 600mbpsThe rating in the listing is false, check Netgear website..." Read more

    "Was unable to connect to an already set up Xfinity account. The Xfinity assistant tried for quite a few hours with no luck either...." Read more

    "Great value, quick set up, got my great wifi signal back." Read more

    7 customers mention0 positive7 negative

    Customers are dissatisfied with the temperature of the modem. They mention that it overheats and has bad cooling, due to a poor design of cheap plastic.

    "Needs to be reset almost daily to keep usable speeds on Spectrum. Overheats and is always hot to the touch...." Read more

    "Works well, but runs a little warm, so I worry about how long it will last." Read more

    "Overheats quickly on intensive use of internet. Speed degrades drastically...." Read more

    "very slow.. was pulling 20mbs after numerous resets and was hot to the touch..very poor product" Read more

    Junk.
    1 Star
    Junk.
    Upon installing and activating this modem it was obvious something was not right.Pages loaded like back when I had dial-up.Speedtest.net indicated the my download speed was about 5% lower ( 27-28Mbps vs 29-30) -- (not something you would notice in everyday usage but still a deficiency). However the ping time, which for any cable connection should average 30ms or less, was up over 150!! The modem which I am renting regularly runs in the teens for ping time. I even replaced the ethernet cable, nope. This Netgear is just junk.Remember when images loaded top to bottom? This modem takes you back to those days.Back to Amazon it goes.
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    Top reviews from the United States

    Reviewed in the United States on February 28, 2024
    This modem is a docsis 3.0 so it does not support the higher internet speeds but does support up to 650 mbs which I only have 200mbs. This is one of the best modem I have owned. I have not had one issue with it.
    Reviewed in the United States on October 22, 2017
    TL;DR - A little difficult to troubleshoot at first because I've never done it, but resolved. The modem works as expected, and I've had almost no problems on my side since it was activated. Good speed for streaming and regular surfing. It works well with a Netgear Wifi router.

    Troubleshooting details: It didn't originally work with my cable provider's Internet, but I did 2 steps to rectify that. First I went into the network's Status -> Details -> DHCP, and enabled DHCP. This allows it to provide an IP address for the Internet host. Mine was originally disabled. Netgear's customer service wanted to charge me a service plan to do this remotely. If you have any IT or technical experience, you can probably TROUBLESHOOT IT YOURSELF. Then after multiple calls, the right customer representative from my Internet provider reset something on her side to read that IP address, and it worked perfectly.
    6 people found this helpful
    Report
    Reviewed in the United States on October 6, 2021
    this item is a great value for the money how ever it did not work up to specs. When installed after 2 hours on the phone with Cox internet support it only achieved 34mps speed vs my old Motorola SB6121 was getting around 158MPS
    I really wanted this product to work for the money how ever it failed seller was great to work with but I will buy only new from now on
    One person found this helpful
    Report
    Reviewed in the United States on January 13, 2021
    Before this I had a Netgear DSL modem that worked great for me (nonstop) for years, so I didn't hesitate to go with Netgear when I switched to cable for my ISP. Got this refurbished for 54 bucks and it lasted me 7.5 months. Anything I buy I expect to get at least a year out of it, refurbished or not. This was only warranted for 90 days but I took a chance. Had it lasted out the year I'd have given it 5 stars. Netgear is a reliable brand.
    4 people found this helpful
    Report
    Reviewed in the United States on August 16, 2023
    Anyone new to getting their own modem this is perfect for up to 600mbps
    The rating in the listing is false, check Netgear website
    Gets lower latency than my last modem, an arris surfboard,
    Great condition the Mac was recognized by my Xfinity and gtg in 15 min,
    Will update with longevity
    You can also log into this modem with 198.162.100.1 to reset or very basic settings.
    One person found this helpful
    Report
    Reviewed in the United States on May 21, 2022
    After realizing I was paying $13 a month to rent a modem from Cox, I thought I would give this a try.
    Installed modem then called Cox. I'll give Cox credit here, I was immediately connected to a live person. Gave them the MAC address and serial number, and they identified the modem with no problems. Then I had to register the Modem with netgear, and I had internet. I would say the hardest part is figuring out how to register the modem. I believe my start to finish time was about 40 minutes.
    Very pleased so far and this modem will pay for itself in a little over two months.
    4 people found this helpful
    Report
    Reviewed in the United States on August 29, 2021
    This modem worked really well for 8 months. Now, it's already beyond warranty and Netgear no longer provides assistance on it. Ever since a heavy thunderstorm, I can't connect to the modem any more. It was plugged into a surge protector when the power went out, and I turned everything off until the power came back on. Nonetheless, the local network indicator won't light up, and my devices say that there's nothing on the other side of the Cat5 cable. I don't know if anyone has had similar issues with this modem; there's not much useful info on Netgear's websites.
    One person found this helpful
    Report
    Reviewed in the United States on May 22, 2022
    Good, stable docsis 3.0 modem and a good value as long as you don’t need a faster speed than it supports. Make sure your provider supports this model, I found 1 cable company that does not.