In Belmont there are 4 residential Fiber providers covering 93.36% of the city. The average home can get speeds up to 8,356 Mbps. Note that we may have a financial relationship with some of the providers below. This does not influence rankings, and helps us provide high-quality detailed information for free.
This page contains all Fiber internet providers in Belmont, CA.
To see availability maps for all providers including fiber, cable, DSL, and more in Belmont, CA please click below.
Fiber Internet Service Providers in Belmont
Data updated 11/14/2025, based on FCC data from 12/31/2024. This is the most current data available as of .
To avoid wasting your time, providers with less than 1% coverage in Belmont are not shown.
Belmont Satellite TV & Internet Providers
DISH Satellite TV
DIRECTV Satellite TV
Not sure whether to choose Dish or DIRECTV? For most people most of the time we recommend DISH. But click here to learn more.
Viasat Satellite Internet
Where in Belmont is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 93.36% of Belmont. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is Sonic. Call one of the companies with service in Belmont above to see who has service at your home.
How fast is fiber internet in Belmont?
The map below shows maximum fiber internet speeds by area in Belmont.
Fiber Internet Speed Key
The average Belmont home can get up to 8,356 Mbps on their fiber internet plan. The fastest fiber download speed in the city is 10,000 Mbps, which 63.38% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, less than 1% of homes can only purchase plans up to 1,000 Mbps. See the internet provider details below for info about their speed and coverage in Belmont.
Fiber internet speeds tend to be faster in the central parts of Belmont, and slower in the southeast areas of the city.
Is fiber the fastest internet I can get in Belmont?
The fastest internet for you may vary based on where in Belmont you live. In general, cable competes most often with fiber in the city.
- Fiber is the fastest internet type for 92.46% of Belmont homes.
- Cable is fastest for 6.26% of the city.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for less than 1%.
- Satellite internet may be the only option for 1.04% of Belmont homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in Belmont, along with details on where in Belmont and at what speeds.
EarthLink Fiber in Belmont, CA
EarthLink fiber coverage
About 88.87%, or 25,938 people, have EarthLink fiber internet available to them in the city. The company covers the entire Belmont area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in most of Belmont.
EarthLink fiber download speeds
EarthLink is above average when comparing download speeds to all other internet providers in Belmont. Versus other fiber providers in the area, EarthLink fiber is above average. There are 2 different maximum speeds throughout Belmont. The fastest plan anyone in Belmont can order from EarthLink goes up to 5,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the city-wide average maximum speed for Belmont customers is up to 4,702 Mbps.
Show all download speeds
- 92.6% up to 5,000.0 Mbps
- 7.4% up to 1,000.0 Mbps
EarthLink fiber upload speeds
In Belmont download speeds tend to be equal to than upload speeds for EarthLink fiber. Compared to other ISPs, EarthLink is above average where upload speeds are concerned, and above average compared to other Belmont fiber providers. EarthLink offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Belmont is up to 5,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, EarthLink customers can get speeds up to 4,702 Mbps.
Show all upload speeds
- 92.6% up to 5,000.0 Mbps
- 7.4% up to 1,000.0 Mbps
AT&T Fiber in Belmont, CA
AT&T fiber coverage
About 88.87%, or 25,938 people, have AT&T fiber internet available to them in the city. The company covers the entire Belmont area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in most of Belmont.
AT&T fiber download speeds
AT&T is above average when comparing download speeds to all other internet providers in Belmont. Versus other fiber providers in the area, AT&T fiber is above average. There are 2 different maximum speeds throughout Belmont. The fastest plan anyone in Belmont can order from AT&T goes up to 5,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the city-wide average maximum speed for Belmont customers is up to 4,702 Mbps.
Show all download speeds
- 92.6% up to 5,000.0 Mbps
- 7.4% up to 1,000.0 Mbps
AT&T fiber upload speeds
In Belmont download speeds tend to be equal to than upload speeds for AT&T fiber. Compared to other ISPs, AT&T is above average where upload speeds are concerned, and above average compared to other Belmont fiber providers. AT&T offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Belmont is up to 5,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, AT&T customers can get speeds up to 4,702 Mbps.
Show all upload speeds
- 92.6% up to 5,000.0 Mbps
- 7.4% up to 1,000.0 Mbps
Sonic Fiber in Belmont, CA
Sonic fiber coverage
About 68.32%, or 19,939 people, have Sonic fiber internet available to them in the city. The company covers the south, north, central, west, southwest, east, southeast, and northwest Belmont area. Sonic is a large internet service provider internet service providers in the US, with internet service available in much of Belmont.
Sonic fiber download speeds
Sonic is the fastest when comparing download speeds to all other internet providers in Belmont. Versus other fiber providers in the area, Sonic fiber is the fastest. There are 2 different maximum speeds throughout Belmont. The fastest plan anyone in Belmont can order from Sonic goes up to 10,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the city-wide average maximum speed for Belmont customers is up to 9,349 Mbps.
Show all download speeds
- 92.8% up to 10,000.0 Mbps
- 7.2% up to 1,000.0 Mbps
Sonic fiber upload speeds
In Belmont download speeds tend to be equal to than upload speeds for Sonic fiber. Compared to other ISPs, Sonic is the fastest where upload speeds are concerned, and the fastest compared to other Belmont fiber providers. Sonic offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Belmont is up to 10,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, Sonic customers can get speeds up to 9,349 Mbps.
Show all upload speeds
- 92.8% up to 10,000.0 Mbps
- 7.2% up to 1,000.0 Mbps
XFINITY from Comcast Fiber in Belmont, CA
XFINITY fiber coverage
About 6.80%, or 1,986 people, have XFINITY fiber internet available to them in the city. The company covers the north and northeast Belmont area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Belmont.
XFINITY from Comcast fiber download speeds
XFINITY is above average when comparing download speeds to all other internet providers in Belmont. Versus other fiber providers in the area, XFINITY fiber is below average. There are 2 different maximum speeds throughout Belmont. The fastest plan anyone in Belmont can order from XFINITY goes up to 2,000 Mbps, the slowest package only goes up to 1,200 Mbps, and the city-wide average maximum speed for Belmont customers is up to 1,819 Mbps.
Show all download speeds
- 77.3% up to 2,000.0 Mbps
- 22.7% up to 1,200.0 Mbps
XFINITY from Comcast fiber upload speeds
In Belmont download speeds tend to be faster than than upload speeds for XFINITY fiber. Compared to other ISPs, XFINITY is below average where upload speeds are concerned, and the slowest compared to other Belmont fiber providers. XFINITY offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Belmont is up to 250 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, XFINITY customers can get speeds up to 201 Mbps.
Show all upload speeds
- 77.3% up to 250.0 Mbps
- 22.7% up to 35.0 Mbps
Belmont Fiber by Area
This information is most helpful to those looking for homes or considering moving to Belmont or any of the areas nearby.
How does fiber internet in Belmont compare to the rest of California?
Fiber internet speeds in Belmont are much faster versus the average speeds in California: 0.00 Mbps in California versus 8,356 Mbps in the city. The state has similar fiber availability compared to the city. Average fiber coverage in California is 0.00% versus 93.36% in Belmont.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around Belmont are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does fiber internet look like in other cities?
Below are cities nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Cities
- San Carlos, CA: more fiber coverage, slower speeds
- San Mateo, CA: less fiber coverage, slower speeds
- Foster City, CA: less fiber coverage, slower speeds
- Highlands-Baywood Park, CA: more fiber coverage, slower speeds
- Redwood City, CA: less fiber coverage, slower speeds
- Hillsborough, CA: less fiber coverage, slower speeds
- North Fair Oaks, CA: more fiber coverage, faster speeds
- Burlingame, CA: less fiber coverage, slower speeds
- Woodside, CA: less fiber coverage, slower speeds
- Atherton, CA: less fiber coverage, faster speeds
Cities with Similar Populations
- Sugar Hill, GA: more fiber coverage, slower speeds
- Clover, SC: less fiber coverage, slower speeds
- Corbin, KY: less fiber coverage, slower speeds
- West Springfield Town, MA: less fiber coverage, slower speeds
- West Roxbury, MA: more fiber coverage, slower speeds
- Waynesboro, VA: more fiber coverage, slower speeds
- Uniondale, NY: less fiber coverage, slower speeds
- Oxford, OH: less fiber coverage, slower speeds
- Englewood, NJ: less fiber coverage, slower speeds
- Magna, UT: more fiber coverage, slower speeds