In San Carlos there are 9 residential internet providers covering 100.00% of the city. The average home can get speeds up to 4,561 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.
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9 Internet Service Providers in San Carlos
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 San Carlos are not shown.
San Carlos 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
Availability maps for all providers in San Carlos
Using the dropdown below, please select a provider. Green indicates nearly all homes have service, red indicates few homes have service, and blank indicates no service.
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Internet service is available in 100.00% of San Carlos. Using our interactive availability map, you can compare service areas for different providers, we include fiber, cable, DSL, or fixed wireless internet service for all providers who offer it. You will notice that some providers might be listed multiple times for each service. If you find no providers cover the location you're looking at, you can opt for satellite service. The most widely available provider is AT&T. Now you can call companies in San Carlos with more confidence that they might be available.
How fast are internet speeds in San Carlos?
The map below shows maximum internet speeds by area in San Carlos.
Internet Speed Key
The average San Carlos home can get up to 4,561 Mbps on their internet plan. For most people, the fastest download speed in the city is 10,000 Mbps, which less than 1% 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 25 Mbps. See the internet provider details below for info about their speed and coverage in San Carlos.
Internet speeds tend to be faster in the southeast parts of San Carlos, and slower in the southwest areas of the city.
What type of internet should I choose in San Carlos?
The fastest internet for you may vary based on where in San Carlos you live. If speed is your main concern, fiber will be the fastest internet in the city.
- Fiber is the fastest internet type for 85.13% of San Carlos homes.
- Cable is fastest for 14.79% 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 less than 1% of San Carlos homes.
Internet Market Health in San Carlos
Internet Competition Key
The map shows how competitive the San Carlos internet service market is. Areas in green have more alternatives, areas in yellow have a few choices, and areas in red may have only one provider. More competition usually means faster speeds and better prices for you, the customer.
Below are quick facts on internet competition and market health in San Carlos based on what connections the average home has availabile:
- Average number of internet service providers to a home: 9.3 (very healthy)
- Average types of service (fiber, cable, DSL, etc): 3.5 (very healthy)
- Average providers with broadband (25 Mbps+) speeds: 9.1 (very healthy)
Overall, competition is very healthy.
San Carlos internet customers have the ability to buy internet service from 1 to 12 different providers, depending on where they live. For different types of service, San Carlos homes have between 1 and 4 options. The type(s) of service available are fixed wireless, cable, fiber, and dsl, though these may vary depending on the region within the city.
When it comes to broadband download speeds faster than 25 Mbps, the situation is worse. San Carlos internet customers who want faster speeds have between 1 and 12 choices of companies offering speeds up to or over 25 Mbps.
More internet companies with faster speeds means fewer monopolies and better prices for customers. In promoting a free market for internet, San Carlos is doing quite well.
TV & Internet Providers in Depth
Below you'll find which TV and internet providers offer service in San Carlos, along with details on where in San Carlos and at what speeds.
XFINITY from Comcast Cable in San Carlos, CA
XFINITY cable coverage
About 99.91%, or 32,203 people, have XFINITY cable internet available to them in the city. The company covers the entire San Carlos area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in most of San Carlos.
XFINITY from Comcast cable download speeds
XFINITY is above average when comparing download speeds to all other internet providers in San Carlos. Versus other cable providers in the area, XFINITY cable is the fastest. There are no different maximum speeds throughout San Carlos. The fastest plan anyone in San Carlos can order from XFINITY goes up to 2,000 Mbps, and all San Carlos customers can get this speed.
Show all download speeds
- 100.0% up to 2,000.0 Mbps
XFINITY from Comcast cable upload speeds
In San Carlos download speeds tend to be faster than than upload speeds for XFINITY cable. Compared to other ISPs, XFINITY is below average where upload speeds are concerned, and the fastest compared to other San Carlos cable providers. XFINITY offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in San Carlos is up to 250 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 250.0 Mbps
EarthLink Fiber in San Carlos, CA
EarthLink fiber coverage
About 89.15%, or 28,735 people, have EarthLink fiber internet available to them in the city. The company covers the entire San Carlos area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in most of San Carlos.
EarthLink fiber download speeds
EarthLink is one of the fastest when comparing download speeds to all other internet providers in San Carlos. Versus other fiber providers in the area, EarthLink fiber is one of the fastest. There are 2 different maximum speeds throughout San Carlos. The fastest plan anyone in San Carlos 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 San Carlos customers is up to 4,819 Mbps.
Show all download speeds
- 95.5% up to 5,000.0 Mbps
- 4.5% up to 1,000.0 Mbps
EarthLink fiber upload speeds
In San Carlos download speeds tend to be equal to than upload speeds for EarthLink fiber. Compared to other ISPs, EarthLink is one of the fastest where upload speeds are concerned, and one of the fastest compared to other San Carlos 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 San Carlos 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 4,819 Mbps.
Show all upload speeds
- 95.5% up to 5,000.0 Mbps
- 4.5% up to 1,000.0 Mbps
AT&T Fiber in San Carlos, CA
AT&T fiber coverage
About 89.15%, or 28,735 people, have AT&T fiber internet available to them in the city. The company covers the entire San Carlos area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in most of San Carlos.
AT&T fiber download speeds
AT&T is one of the fastest when comparing download speeds to all other internet providers in San Carlos. Versus other fiber providers in the area, AT&T fiber is one of the fastest. There are 2 different maximum speeds throughout San Carlos. The fastest plan anyone in San Carlos 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 San Carlos customers is up to 4,819 Mbps.
Show all download speeds
- 95.5% up to 5,000.0 Mbps
- 4.5% up to 1,000.0 Mbps
AT&T fiber upload speeds
In San Carlos download speeds tend to be equal to than upload speeds for AT&T fiber. Compared to other ISPs, AT&T is one of the fastest where upload speeds are concerned, and one of the fastest compared to other San Carlos 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 San Carlos 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 4,819 Mbps.
Show all upload speeds
- 95.5% up to 5,000.0 Mbps
- 4.5% up to 1,000.0 Mbps
Sonic Fiber in San Carlos, CA
Sonic fiber coverage
About 86.38%, or 27,841 people, have Sonic fiber internet available to them in the city. The company covers the entire San Carlos area. Sonic is a large internet service provider internet service providers in the US, with internet service available in most of San Carlos.
Sonic fiber download speeds
Sonic is below average when comparing download speeds to all other internet providers in San Carlos. Versus other fiber providers in the area, Sonic fiber is the slowest. There are 2 different maximum speeds throughout San Carlos. The fastest plan anyone in San Carlos 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 San Carlos customers is up to 1,018 Mbps.
Show all download speeds
- 0.2% up to 10,000.0 Mbps
- 99.8% up to 1,000.0 Mbps
Sonic fiber upload speeds
In San Carlos download speeds tend to be equal to than upload speeds for Sonic fiber. Compared to other ISPs, Sonic is above average where upload speeds are concerned, and below average compared to other San Carlos 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 San Carlos 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 1,018 Mbps.
Show all upload speeds
- 0.2% up to 10,000.0 Mbps
- 99.8% up to 1,000.0 Mbps
EarthLink DSL in San Carlos, CA
EarthLink DSL coverage
About 57.84%, or 18,642 people, have EarthLink DSL internet available to them in the city. The company covers the entire San Carlos area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of San Carlos.
EarthLink DSL download speeds
EarthLink is below average when comparing download speeds to all other internet providers in San Carlos. Versus other DSL providers in the area, EarthLink DSL is one of the fastest. There are 5 different maximum speeds throughout San Carlos. The fastest plan anyone in San Carlos can order from EarthLink goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for San Carlos customers is up to 67 Mbps.
Show all download speeds
- 53.8% up to 100.0 Mbps
- 4.0% up to 75.0 Mbps
- 10.3% up to 50.0 Mbps
- 9.7% up to 25.0 Mbps
- 22.2% up to 10.0 Mbps
EarthLink DSL upload speeds
In San Carlos download speeds tend to be faster than than upload speeds for EarthLink DSL. Compared to other ISPs, EarthLink is below average where upload speeds are concerned, and one of the fastest compared to other San Carlos DSL providers. EarthLink offers 4 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 San Carlos is up to 20 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, EarthLink customers can get speeds up to 13 Mbps.
Show all upload speeds
- 57.9% up to 20.0 Mbps
- 10.3% up to 10.0 Mbps
- 9.7% up to 5.0 Mbps
- 22.2% up to 1.0 Mbps
AT&T DSL in San Carlos, CA
AT&T DSL coverage
About 57.84%, or 18,642 people, have AT&T DSL internet available to them in the city. The company covers the entire San Carlos area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of San Carlos.
AT&T DSL download speeds
AT&T is below average when comparing download speeds to all other internet providers in San Carlos. Versus other DSL providers in the area, AT&T DSL is one of the fastest. There are 5 different maximum speeds throughout San Carlos. The fastest plan anyone in San Carlos can order from AT&T goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for San Carlos customers is up to 67 Mbps.
Show all download speeds
- 53.8% up to 100.0 Mbps
- 4.0% up to 75.0 Mbps
- 10.3% up to 50.0 Mbps
- 9.7% up to 25.0 Mbps
- 22.2% up to 10.0 Mbps
AT&T DSL upload speeds
In San Carlos download speeds tend to be faster than than upload speeds for AT&T DSL. Compared to other ISPs, AT&T is below average where upload speeds are concerned, and one of the fastest compared to other San Carlos DSL providers. AT&T offers 4 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 San Carlos is up to 20 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, AT&T customers can get speeds up to 13 Mbps.
Show all upload speeds
- 57.9% up to 20.0 Mbps
- 10.3% up to 10.0 Mbps
- 9.7% up to 5.0 Mbps
- 22.2% up to 1.0 Mbps
XFINITY from Comcast Fiber in San Carlos, CA
XFINITY fiber coverage
About 1.01%, or 324 people, have XFINITY fiber internet available to them in the city. The company covers the north San Carlos 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 San Carlos.
XFINITY from Comcast fiber download speeds
XFINITY is above average when comparing download speeds to all other internet providers in San Carlos. Versus other fiber providers in the area, XFINITY fiber is below average. There are no different maximum speeds throughout San Carlos. The fastest plan anyone in San Carlos can order from XFINITY goes up to 2,000 Mbps, and all San Carlos customers can get this speed.
Show all download speeds
- 100.0% up to 2,000.0 Mbps
XFINITY from Comcast fiber upload speeds
In San Carlos 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 San Carlos fiber providers. XFINITY offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in San Carlos is up to 250 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 250.0 Mbps
T-Mobile Home Internet Fixed Wireless in San Carlos, CA
T-Mobile Home Internet fixed wireless coverage
About 95.48%, or 30,775 people, have T-Mobile Home Internet fixed wireless internet available to them in the city. The company covers the entire San Carlos area. T-Mobile Home Internet is one of the largest internet service providers internet service providers in the US, with internet service available in most of San Carlos.
T-Mobile Home Internet fixed wireless download speeds
T-Mobile Home Internet is below average when comparing download speeds to all other internet providers in San Carlos. Versus other fixed wireless providers in the area, T-Mobile Home Internet fixed wireless is below average. There are 2 different maximum speeds throughout San Carlos. The fastest plan anyone in San Carlos can order from T-Mobile Home Internet goes up to 100 Mbps, the slowest package only goes up to 25 Mbps, and the city-wide average maximum speed for San Carlos customers is up to 95 Mbps.
Show all download speeds
- 93.8% up to 100.0 Mbps
- 6.2% up to 25.0 Mbps
T-Mobile Home Internet fixed wireless upload speeds
In San Carlos download speeds tend to be faster than than upload speeds for T-Mobile Home Internet fixed wireless. Compared to other ISPs, T-Mobile Home Internet is below average where upload speeds are concerned, and below average compared to other San Carlos fixed wireless providers. T-Mobile Home Internet 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 San Carlos is up to 20 Mbps. Some customers have slower plan choices, which only go up to 3.0 Mbps. On average, T-Mobile Home Internet customers can get speeds up to 19 Mbps.
Show all upload speeds
- 93.8% up to 20.0 Mbps
- 6.2% up to 3.0 Mbps
EarthLink Fixed Wireless in San Carlos, CA
EarthLink fixed wireless coverage
About 95.20%, or 30,685 people, have EarthLink fixed wireless internet available to them in the city. The company covers the entire San Carlos area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in most of San Carlos.
EarthLink fixed wireless download speeds
EarthLink is one of the slowest when comparing download speeds to all other internet providers in San Carlos. Versus other fixed wireless providers in the area, EarthLink fixed wireless is one of the slowest. There are 2 different maximum speeds throughout San Carlos. The fastest plan anyone in San Carlos can order from EarthLink goes up to 100 Mbps, the slowest package only goes up to 25 Mbps, and the city-wide average maximum speed for San Carlos customers is up to 39 Mbps.
Show all download speeds
- 18.3% up to 100.0 Mbps
- 81.7% up to 25.0 Mbps
EarthLink fixed wireless upload speeds
In San Carlos download speeds tend to be faster than than upload speeds for EarthLink fixed wireless. Compared to other ISPs, EarthLink is one of the slowest where upload speeds are concerned, and one of the slowest compared to other San Carlos fixed wireless 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 San Carlos is up to 20 Mbps. Some customers have slower plan choices, which only go up to 3.0 Mbps. On average, EarthLink customers can get speeds up to 6.1 Mbps.
Show all upload speeds
- 18.3% up to 20.0 Mbps
- 81.7% up to 3.0 Mbps
AT&T Fixed Wireless in San Carlos, CA
AT&T fixed wireless coverage
About 95.20%, or 30,685 people, have AT&T fixed wireless internet available to them in the city. The company covers the entire San Carlos area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in most of San Carlos.
AT&T fixed wireless download speeds
AT&T is one of the slowest when comparing download speeds to all other internet providers in San Carlos. Versus other fixed wireless providers in the area, AT&T fixed wireless is one of the slowest. There are 2 different maximum speeds throughout San Carlos. The fastest plan anyone in San Carlos can order from AT&T goes up to 100 Mbps, the slowest package only goes up to 25 Mbps, and the city-wide average maximum speed for San Carlos customers is up to 39 Mbps.
Show all download speeds
- 18.3% up to 100.0 Mbps
- 81.7% up to 25.0 Mbps
AT&T fixed wireless upload speeds
In San Carlos download speeds tend to be faster than than upload speeds for AT&T fixed wireless. Compared to other ISPs, AT&T is one of the slowest where upload speeds are concerned, and one of the slowest compared to other San Carlos fixed wireless 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 San Carlos is up to 20 Mbps. Some customers have slower plan choices, which only go up to 3.0 Mbps. On average, AT&T customers can get speeds up to 6.1 Mbps.
Show all upload speeds
- 18.3% up to 20.0 Mbps
- 81.7% up to 3.0 Mbps
Etheric Networks Fixed Wireless in San Carlos, CA
Etheric Networks fixed wireless coverage
About 92.48%, or 29,807 people, have Etheric Networks fixed wireless internet available to them in the city. The company covers the entire San Carlos area. Etheric Networks is a large internet service provider internet service providers in the US, with internet service available in most of San Carlos.
Etheric Networks fixed wireless download speeds
Etheric Networks is below average when comparing download speeds to all other internet providers in San Carlos. Versus other fixed wireless providers in the area, Etheric Networks fixed wireless is above average. There are no different maximum speeds throughout San Carlos. The fastest plan anyone in San Carlos can order from Etheric Networks goes up to 250 Mbps, and all San Carlos customers can get this speed.
Show all download speeds
- 100.0% up to 250.0 Mbps
Etheric Networks fixed wireless upload speeds
In San Carlos download speeds tend to be faster than than upload speeds for Etheric Networks fixed wireless. Compared to other ISPs, Etheric Networks is below average where upload speeds are concerned, and the fastest compared to other San Carlos fixed wireless providers. Etheric Networks offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in San Carlos is up to 100 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 100.0 Mbps
Verizon Fixed Wireless in San Carlos, CA
Verizon fixed wireless coverage
About 70.70%, or 22,788 people, have Verizon fixed wireless internet available to them in the city. The company covers the entire San Carlos area. Verizon is one of the largest internet service providers internet service providers in the US, with internet service available in much of San Carlos.
Verizon fixed wireless download speeds
Verizon is below average when comparing download speeds to all other internet providers in San Carlos. Versus other fixed wireless providers in the area, Verizon fixed wireless is the fastest. There are no different maximum speeds throughout San Carlos. The fastest plan anyone in San Carlos can order from Verizon goes up to 300 Mbps, and all San Carlos customers can get this speed.
Show all download speeds
- 100.0% up to 300.0 Mbps
Verizon fixed wireless upload speeds
In San Carlos download speeds tend to be faster than than upload speeds for Verizon fixed wireless. Compared to other ISPs, Verizon is below average where upload speeds are concerned, and below average compared to other San Carlos fixed wireless providers. Verizon offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in San Carlos is up to 20 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 20.0 Mbps
San Carlos Internet by Area
This information is most helpful to those looking for homes or considering moving to San Carlos or any of the areas nearby.
How does internet in San Carlos compare to the rest of California?
Internet speeds in San Carlos are faster versus the average speeds in California: 3,631 Mbps in California versus 4,561 Mbps in the city. The state has similar internet availability compared to the city. Average internet coverage in California is 98.73% versus 100.00% in San Carlos.
What zip codes have widespread internet?
Internet coverage varies by zip code and neighborhood. Some examples in or around San Carlos are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does internet service 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
- Belmont, CA: less internet coverage, faster speeds
- Redwood City, CA: less internet coverage, faster speeds
- North Fair Oaks, CA: equal internet coverage, faster speeds
- Foster City, CA: less internet coverage, slower speeds
- Woodside, CA: less internet coverage, slower speeds
- San Mateo, CA: less internet coverage, faster speeds
- Atherton, CA: equal internet coverage, faster speeds
- Highlands-Baywood Park, CA: equal internet coverage, faster speeds
- Menlo Park, CA: less internet coverage, faster speeds
- Hillsborough, CA: less internet coverage, slower speeds
Cities with Similar Populations
- Milford, OH: less internet coverage, slower speeds
- Pueblo West, CO: less internet coverage, slower speeds
- Port Chester, NY: less internet coverage, faster speeds
- Plattsburgh, NY: less internet coverage, slower speeds
- Pittsford, NY: less internet coverage, faster speeds
- Pineville, LA: less internet coverage, slower speeds
- Paradise Hills, NM: less internet coverage, slower speeds
- Palm City, FL: less internet coverage, slower speeds
- Orangevale, CA: equal internet coverage, slower speeds
- Niles, IL: equal internet coverage, slower speeds