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Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port

4.4 4.4 out of 5 stars 28,808 ratings

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DOCSIS 3.1 (1 Gbps Ethernet Port)

Purchase options and add-ons

Brand Motorola
Internet service provider spectrum, optimum, cox, xfinity
Connectivity Technology Cable
Compatible Devices Personal Computer
Product Dimensions 7.25"L x 2.25"W x 7.88"H

About this item

  • Top Internet Speeds for all Multi-gigabit Speed Tiers - Wirecutter recommends this model as the best cable modem for people using Gigabit Internet plans. Built-in DOCSIS 3.1 and DOCSIS 3.0 32x8 capabilities give top Internet speeds for all cable Internet services.
  • Save Money - Eliminate up to 168 dollars per year in cable modem rental fees (Savings are shown for Comcast Xfinity and vary by cable service provider.) Approved by Comcast Xfinity and Xfinity X1, Cox, and CableOne for all speeds including Comcast Gigabit services and Cox Gigablast. Not compatible with RCN. No cable modem is compatible with fiber optic, DSL, or satellite services, available from Verizon, AT&T, CenturyLink, Frontier, and others.)
  • Flexible Compatibility - Pair with any Wi-Fi router you’d like, including Whole Home Wi-Fi or Mesh routers like eero, Google Wi-Fi, and Orbi. A 10/100/1000 Gigabit Ethernet port allows connection of any SINGLE device with an Ethernet port including a router, Windows or Mac computer, HDTV, or game station. This cable modem does not have a built-in wireless router or telephone call capability.
  • Proactive Network Security - A broadcom chipset provides advanced security from denial-of service attacks.
  • Active Queue Management (AQM) - AQM significantly reduces Internet latency on both DOCSIS 3.1 and 3.0 services, resulting in faster page loads for all Web traffic and enhanced interactive applications like online gaming and video conferencing. The MB8600 also includes a full-band capture digital tuner to enhance speed and save energy.
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Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port

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Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port
Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port
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Hitron CODA DOCSIS 3.1 Modem | Pairs with Any WiFi Router or Mesh WiFi | Certified with Comcast Xfinity, Charter Spectrum, Cox | 10x Faster Than DOCSIS 3.0 | Cable Modem with 2X 1 Gbps Ethernet Ports
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Motorola MG8702- DOCSIS 3.1 Cable Modem Wi-Fi Router,(High Speed Combo) with Intelligent Power Boost - AC3200 Wi-Fi Speed, Approved for Comcast Xfinity, Cox, and Charter Spectrum - (Renewed )
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Price$172.34-10% $197.99
List:$219.99
$99.99-23% $189.99
New Price:$249.98
$57.99-25% $149.99
List:$199.99
Delivery
Get it as soon as Monday, Mar 25
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Tuesday, Mar 26
Customer Ratings
Easy to install
4.4
4.2
4.4
4.0
4.3
4.2
WiFi signal
3.9
3.7
3.8
2.5
3.9
3.8
Tech Support
3.5
3.2
3.1
3.7
3.4
Value for money
4.1
3.8
4.3
4.0
For gaming
4.5
4.5
3.8
Sold By
Fliptek
Amazon.com
Hitron Americas
Motorola Networking Renewed
Abe's Electronics Center
MTRLC LLC
connectivity tech
Cable
Ethernet
Ethernet
Wi-Fi, Ethernet
Wired
Wi-Fi, Ethernet
ethernet ports
2
2
2
4
1
4
number of ports
6
2
3
4
8
4
data transfer rate
6 gigabits per second
2500 megabits per second
1 gigabits per second
680 megabits per second
1 gigabits per second
max downstream rate
686 megabits per second
2500 megabits per second
1 gigabits per second
343 megabits per second
1000 megabits per second
max upstream rate
1 gigabits per second
2.5 gigabits per second
123 megabits per second

Product guides and documents


Product Description

No modem rental fees. Ultra-fast, reliable Internet.
Family using Internet connected devices.

The smart choice for your cable Internet service

Eliminate monthly cable modem rental fees – Typically saves 156 dollars per year in Xfinity cable modem rental fees. Actual savings depend on your service provider.

1,000+ Mbps – Maximum actual Internet download speed

GigE Ethernet port – For a high-speed wired connection to any router, computer, or other Internet-capable device.

MB8600 cable modem shown with a WiFi router

Connect any WiFi router you choose

Plugs easily into any router for shared Internet access by all your WiFi and Ethernet-capable devices. This flexible approach lets you pair this cable modem with any router you choose for your WiFi needs, including a mesh router or gaming router.

If the MB8600’s Ethernet port isn’t used for a router, it can plug into a computer, HDTV, game station, or other Ethernet device.

Certified by Xfinity and Cox

Recommended for Comcast Internet speeds up to 1,000 Mbps.

Easy setup with just 3 connections: power, coax cable, and Ethernet.

Compatible with Most Cable Providers

Certified by Comcast Xfinity, Cox, and other cable providers.*†

* Not compatible with Verizon, AT&T, CenturyLink, and other fiber optic, satellite, or DSL services.

† This cable modem does not have telephone jacks for the support of voice calls.

Ultra-Fast Internet Speed

For other service providers, supported service speeds are similar to Comcast.

Easy Setup

Connects fast with just 3 connections – power, coax cable, and Ethernet.

MB7420 product image MB7621 product image MB8600 product image mb8611
MB7420 MB7621 MB8600 MB8611
Customer Reviews
4.4 out of 5 stars
6,311
4.4 out of 5 stars
28,808
4.4 out of 5 stars
28,808
4.4 out of 5 stars
28,808
Product Type (This table only includes cable modems with NO built-in WiFi router) 16x4 Cable Modem 24x8 Cable Modem DOCSIS 3.1 plus 32x8 3.0 Cable Modem DOCSIS 3.1 plus 32x8 3.0 Cable Modem
DOCSIS Channel Bonding 16x4 DOCSIS 3.0 24x8 DOCSIS 3.0 DOCSIS 3.1 plus 32x8 DOCSIS 3.0 DOCSIS 3.1 plus 32x8 DOCSIS 3.0
Certified for These Cable Internet Services. Typically Works with Many Others. Comcast Xfinity, Cox, Spectrum, Suddenlink, Sparklight (CableOne) Comcast Xfinity, Cox, Spectrum, Suddenlink, Sparklight (CableOne) Comcast Xfinity, Cox Comcast Xfinity and Cox
Recommended by Comcast Xfinity for Internet Service This Speed Tier or Below 300 Mbps 600 Mbps 1000 Mbps 1000 Mbps
Maximum Internet Download Speed (Actual speeds are lower) 686 Mbps 1000+ Mbps 6000 Mbps 1 Gbps
Built-in WiFi Router No No No No
Built-in Telephone Port No No No No
Works With Any WiFi Router That Has an Ethernet WAN port
2.5G Ethernet Port

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Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port


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From the brand

Customer reviews

4.4 out of 5 stars
4.4 out of 5
28,808 global ratings

Customers say

Customers like the performance and stability of the modem. For example, they mention it delivers high performance and is capable of handling higher speeds. Customers also appreciate ease of installation. That said, some complain about the reboots. Opinions are mixed on quality, compatibility, and value.

AI-generated from the text of customer reviews

2,792 customers mention2,097 positive695 negative

Customers like the performance of the modem. They mention that it delivers high performance and stability, and is capable of handling higher speeds. Some say they haven't had any lagging or any buffering, and that it works great with XFINITY. Some customers also say that they have a decent expectation of a great ROI, and it works with the ISP WOW.

"...Plus it's blazingly fast." Read more

"...This modem is a game-changer, offering blazing-fast internet speeds and seamless compatibility with any WiFi router...." Read more

"...Activation worked fine.I did get a dead on arrival modem the first time. I guess the quality check in production is not quite there...." Read more

"...It was frustrating to watch a movie only for it to stop and start buffering...." Read more

1,414 customers mention1,306 positive108 negative

Customers find the installation process of the modem to be easy. They mention that the instructions are thorough and easy to follow. Some customers also mention that it is simple to add online with Comcast.

"...Setting up the MB8611 was a breeze. It's a plug-and-play device, so all I had to do was connect it to my coaxial cable, power it on, and it was..." Read more

"...I got the Motorola AC2600 4x4 WiFi Smart router. Installation of both devices was very easy. Literally, plug and play...." Read more

"...Installation with Xfinity is a breeze now. Just hook the modem up, go to xfinity.com/activate. Punch in your cell phone number for the account...." Read more

"...So far it appears I worried needlessly. Setup and activation was a breeze...." Read more

242 customers mention211 positive31 negative

Customers like the stability of the modem. They mention that it has been stable so far with no issues, it is strong, and well-designed. Customers also appreciate that the mode is designed to handle a much higher load.

"...I believe this to be a well designed, solid modem...." Read more

"...This cable mode delivers not only the high performance and stability, but absolutely the easiest cable modem installation that I have done yet...." Read more

"...This modem is thermally designed to handle a much higher load, which means that if used way under load, I should rarely, if ever, have failures due..." Read more

"...advertised as plug-in-play with XFINITY, this product has been very reliable so far. Runs very cool and quiet...." Read more

813 customers mention552 positive261 negative

Customers are mixed about the quality of the modem. Some mention that it's a good modem that delivers the full bandwidth, while others say that they are not the rock solid modems from the early Motorola generation, that the router isn't strong enough for the whole house, and that the mode was likely just a faulty unit.

"...Wow. I really like this modem. This is a barebones rock solid dead simple workhorse...." Read more

"...Another standout feature of this modem is its multi-gigabit capability...." Read more

"The modem works great, but the 12v wall wort failed after 5 months...." Read more

"...the Broadcom's offering -- and for very good reasons, it has great hardware specs...." Read more

439 customers mention292 positive147 negative

Customers are mixed about the value of the modem. Some mention that it is a good value, while others say that the value is mediocre at best and disappointing at worst. Some customers also say that it increases the price of an obviously defective modem and makes it useless.

"Pricy, but worth it. Motorola is the go to brand for high quality...." Read more

"Reasonably priced, easy to install and almost a 40% increase in download speed...." Read more

"...from the 192.168.100.1 web server, makes it, once again, totally useless." Read more

"...-The future of modems, great investment at a better price than the Netgear and ARRIS branded 3.1 modems...." Read more

257 customers mention98 positive159 negative

Customers are mixed about the compatibility of the modem. Some mention that it works well with any WiFi router, while others say that it is not compatible with Xfinity's gigabit plan.

"...Unfortunately I have to return it in that it is not compatible with my Spectrum plan." Read more

"...That's it. It makes a connection. And hasn't failed since I got it a month or so ago...." Read more

"...It doesn't store but a few entries...." Read more

"...Just google "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing" on MB8611...." Read more

1,075 customers mention246 positive829 negative

Customers have connectivity issues with the modem. They say that it loses the LAN connection every five minutes, and cannot obtain an Internet connection. They also say that the mode does not have phone connection and does not provide WiFi. Customers also mention that the admin port does not work, and that the 8 unused channels are not used.

"...It doesn't have phone connection like the ISP's modem did...." Read more

"...Comcast quickly (according to the lights); but, I could not obtain an Internet connection...." Read more

"...gentlemen comment on this review saying that the modem doesn't have any router functionality what so ever and that a separate router was needed...." Read more

"...It supports link aggregation, allowing me to combine two Ethernet ports for even faster speeds...." Read more

293 customers mention32 positive261 negative

Customers are dissatisfied with the reboots of the modem. They mention that it reboots a few times a week, and the mode itself reboots every couple of hours. The internet would stutter and froze, and it would take forever to load. The modem also has intermittent T3's resulting in modem reboots.

"...was pretty easy, but after a month and a half, the modem would suddenly reboot with no warning. No power issues...nothing obvious...." Read more

"...1.5yrs of ownership it has dropped signals numerous of times, needing constant resets...." Read more

"...After further troubleshooting I determined that the modem itself was rebooting every couple of hours...." Read more

"...change to another port, or something of that nature, you may have to restart the unit." Read more

Very satisfied with the MB8611 after 2 yrs
5 Stars
Very satisfied with the MB8611 after 2 yrs
MB8611 purchased mid 2020 to replace an old Zoom DOCSIS 3.0 modem. Modem has been connected to a Linksys WRT1200ac router running regularly updated DD-WRT firmware since purchase. Both modem/router are sitting behind a small APC battery backup/surge protector (BE600M1). This review is for the MB8611 only and should not be considered valid for the MB8600 or MB7621 nether of which I have purchased/knowledge.The MB8611 was a little higher priced than I hoped but a $50 gift card helped ease the pain. I did lots of research and found the MB8611 was the best fit for my setup and future service upgrades. My Zoom modem was maxed at 343 Mbps DL where as the MB8611 could handle up to 2.5 Gbps which was nearly double what my router can handle. When MB8611 was purchased my service was 100 Mbps, ISP upgraded me to 200 Mbps and with this last ISP upgrade now sits at 300 Mbps. (none of the upgrades were requested)Confirmed all accessories were present so I unboxed and hooked it up. I was surprised to have an active internet connection within a couple of minutes after boot completion. Feeling uneasy about the nearly instant connection I contacted my ISP via phone and went through the process of registering my new modem's MAC address. It may not have been necessary to do so but I felt more confident about a continued connection once my ISP confirmed they saw the new modem and registered the MAC address. BTW, I had checked prior to purchase and found the MB8611 had been newly added to my ISP's list of approved user modems.I was concerned the first couple of weeks but basically have ignored the modem since. After approx 2 yrs I thought I should share my experience. The MB8611's performance has been amazing. The router is rebooted every night but the modem has not been rebooted since purchased. I've had a couple of connection drops but quickly confirmed my ISP was off-line in my area temporarily. With three wired and ten wireless devices the MB8611 has been rock solid. It just works without any intervention from myself. I consider it one of my best investments.The modem sits on top of a file cabinet next to my router. Placing my hands on the sides at the top it is slightly warm and cool at the bottom. I was using QoS on my router but disabled it to try the modem's Active Queue Management (AQM). With no apparent change in performance I left the router QoS disabled. The modem lights are on solid except for the bottom LAN connection light which blinks constantly. That may be a negative for some?I highly recommend the MB8611. It has been the best modem I've owned to date. I have attached a page from the MB8611 manual that explains the lights color/blinking/status. The modem lights image to the right is my modem's appearance connected to a 300 Mb service. I've also added the rear view of the three similar modems to indicate what the MB8611 back view is (left) compared to the other two available on the MB8611 Amazon page.
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Reviewed in the United States on March 27, 2018
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