Best Cable Modem for Comcast Xfinity Blast – Since Comcast is one of the largest internet providers in the US, it has plenty of compatible modems. So, there are many options. I have, however, found that Motorola MB8611 is the best option out there for Xfinity internet.
As it provides a fast internet connection for a reasonable price.
When you go with this modem, you’ll eliminate the rental fees that come with your cable modem. That means you’ll enjoy a great deal of savings in the long run. The modem itself works with a large number of cable service providers, including Comcast Xfinity, Cox, Charter Spectrum, Time Warner Cable and RCN.
In our analysis of 33 expert reviews, the Motorola MB7621 24 x 8 Cable Modem Modem placed 3rd when we looked at the top 12 products in the category.
2.NETGEAR Cable Modem CM400
This affordable Xfinity-compatible modem is reliable and easy to install. For a bargain modem you can set and forget, it doesn’t get better than this.
Although this modem doesn’t have the latest DOCSIS 3.1 technology, it uses DOCSIS 3.0 technology at speeds most Xfinity households will appreciate. And if that techy talk has you baffled, don’t worry. We’re just saying the NETGEAR CM400 will take good care of you and your Xfinity plan.
Your favorite writer (me) uses the NETGEAR CM400 at home when I’m not testing out the Xfinity xFi Gateway. It’ll be a perfect fit for you, too, if you use Xfinity’s Performance Starter or Performance Select plans.
3.ARRIS Surfboard SB6183-RB
ARRIS’s easy-to-use SB6183 SURFboard DOCSIS 3.0 Cable Modem offers the highest speeds available in the SURFboard modem lineup. Utilizing the power of DOCSIS 3.0, the SB6183 enables channel bonding of up to 16 downstream channels and four upstream channels, which provide download speeds up to 686 Mbps.
Speeds that fast take HD video streaming and online gaming to a whole new level. Future-proof your home network with the SB6183. With over 135 million sold, it’s a no brainer!
The Motorola MG7700 combines an AC1900 dual-band wireless router technology with a DOCSIS 3.0 24×8 channel cable to deliver high-speed Wi-Fi access to its clients.
The performance that the Motorola MG7700 can provide and the relatively affordable price tag that comes with it makes this router/modem an excellent alternative and upgrade to the default unit that your ISP provides.
However, how does the Motorola MG7700 stack up against other routers/modem units in the same price bracket? To find out, we put the MG7700 through the wringer to fully evaluate its overall functionality and performance.
Netgear’s Nighthawk brand is a mainstay of the router aisle. This year, the company added a new Nighthawk-branded mesh system into the mix, complete with support for Wi-Fi 6 — the newest, fastest version of Wi-Fi.
Most intriguing of all: The two-piece Nighthawk mesh system only costs . That’s less than you’ll spend for the Nest Wifi, a well-reviewed two-piece mesh system that doesn’t support Wi-Fi 6 at all.
Nighthawk mesh router was plenty fast in our lab-based top speed tests — it actually notched the fastest close-range transfer speed that we’ve seen from any of the mesh routers we’ve tested thus far, including a few models that cost twice as much. But when I took it home to conduct my real-world speed tests, things were a lot different.
At several points during my tests, where I move from room to room running speed tests from various spots around my house, my speeds would plummet, forcing me to disconnect and then reconnect in order to get my speeds back up where they should be. It wasn’t an issue with my network — it was the Nighthawk router getting confused by a non-stationary client device.
7.ARRIS SURFboard SBG10
ARRIS is a telecommunication giant that has, for over 24 years, dominated the industry ever since it was founded in 1995. It is an internationally renowned US-based brand and has its executive offices in Suwanee, Georgia, United States.
They are incorporated in England and Wales and provide data, video, and telephone services for domestic and commercial use. The brand has a global outreach with design, engineering, distribution, service, and sales offices worldwide.
Their products are said to be top-notch quality and feature some of the most innovative designs that allow them to be incredibly user-friendly. All of these features have allowed them to make their way and become one of the top-most brands in the industry which dominate the market. Furthermore, they have a global following.
Best Cable Modem for Comcast Xfinity Blast – This makes it future-proof because when Xfinity upgrades its internet to DOCSIS 3.1, you won’t have to go get a new modem. And since DOCIS 3.1 is backward compatible, it will work with DOCSIS 3.0. 
The 2.5GB ethernet port is also a great feature. Because this makes the modem compatible with internet plans up to 2500 Mbps.
And even if it feels excessive today, it won’t be in a couple of years.
Coming with a two-year warranty and excellent support (in my experience anyway), I felt that I couldn’t pick any other modem as the number one choice.