In Santa Clara County there are 4 residential DSL providers covering 81.33% of the county. The average home can get speeds up to 106 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 DSL internet providers in Santa Clara County, CA.
To see availability maps for all providers including fiber, cable, DSL, and more in Santa Clara County, CA please click below.
Santa Clara County, CA Availability Maps
DSL Internet Service Providers in Santa Clara County
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 Santa Clara County are not shown.
Santa Clara County 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 Santa Clara County is DSL internet available?
DSL Internet Availability Key
DSL is available in 81.33% of Santa Clara County. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is AT&T. Call one of the companies with service in Santa Clara County above to see who has service at your home.
How fast is DSL internet in Santa Clara County?
The map below shows maximum DSL internet speeds by area in Santa Clara County.
DSL Internet Speed Key
The average Santa Clara County home can get up to 106 Mbps on their DSL internet plan. The fastest DSL download speed in the county is 1,000 Mbps, which 2.57% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 6.88% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Santa Clara County.
DSL internet speeds tend to be faster in the north parts of Santa Clara County, and slower in the southwest areas of the county.
Is DSL the fastest internet I can get in Santa Clara County?
The fastest internet for you may vary based on where in Santa Clara County you live. In general, fiber competes most often with DSL in the county.
- Fiber is the fastest internet type for 50.40% of Santa Clara County homes.
- Cable is fastest for 47.13% of the county.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for less than 1%.
- Satellite internet may be the only option for 1.75% of Santa Clara County homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Santa Clara County, along with details on where in Santa Clara County and at what speeds.
AT&T DSL in Santa Clara County, CA
AT&T DSL coverage
About 78.08%, or 1,511,745 people, have AT&T DSL internet available to them in the county. The company covers the entire Santa Clara County area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in much of Santa Clara County.
AT&T DSL download speeds
AT&T is below average when comparing download speeds to all other internet providers in Santa Clara County. Versus other DSL providers in the area, AT&T DSL is below average. There are 5 different maximum speeds throughout Santa Clara County. The fastest plan anyone in Santa Clara County can order from AT&T goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Santa Clara County customers is up to 78 Mbps.
Show all download speeds
- 58.2% up to 100.0 Mbps
- 13.0% up to 75.0 Mbps
- 16.6% up to 50.0 Mbps
- 6.0% up to 25.0 Mbps
- 6.3% up to 10.0 Mbps
AT&T DSL upload speeds
In Santa Clara County 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 below average compared to other Santa Clara County DSL providers. AT&T offers 4 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Santa Clara County 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 16 Mbps.
Show all upload speeds
- 71.2% up to 20.0 Mbps
- 16.6% up to 10.0 Mbps
- 6.0% up to 5.0 Mbps
- 6.3% up to 1.0 Mbps
EarthLink DSL in Santa Clara County, CA
EarthLink DSL coverage
About 78.08%, or 1,511,745 people, have EarthLink DSL internet available to them in the county. The company covers the entire Santa Clara County area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in much of Santa Clara County.
EarthLink DSL download speeds
EarthLink is below average when comparing download speeds to all other internet providers in Santa Clara County. Versus other DSL providers in the area, EarthLink DSL is below average. There are 5 different maximum speeds throughout Santa Clara County. The fastest plan anyone in Santa Clara County can order from EarthLink goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Santa Clara County customers is up to 78 Mbps.
Show all download speeds
- 58.2% up to 100.0 Mbps
- 13.0% up to 75.0 Mbps
- 16.6% up to 50.0 Mbps
- 6.0% up to 25.0 Mbps
- 6.3% up to 10.0 Mbps
EarthLink DSL upload speeds
In Santa Clara County 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 below average compared to other Santa Clara County DSL providers. EarthLink offers 4 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Santa Clara County 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 16 Mbps.
Show all upload speeds
- 71.2% up to 20.0 Mbps
- 16.6% up to 10.0 Mbps
- 6.0% up to 5.0 Mbps
- 6.3% up to 1.0 Mbps
Sail Internet DSL in Santa Clara County, CA
Sail Internet DSL coverage
About 3.10%, or 60,051 people, have Sail Internet DSL internet available to them in the county. The company covers the entire Santa Clara County area. Sail Internet is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Santa Clara County.
Sail Internet DSL download speeds
Sail Internet is below average when comparing download speeds to all other internet providers in Santa Clara County. Versus other DSL providers in the area, Sail Internet DSL is the fastest. There are 3 different maximum speeds throughout Santa Clara County. The fastest plan anyone in Santa Clara County can order from Sail Internet goes up to 1,000 Mbps, the slowest package only goes up to 200 Mbps, and the county-wide average maximum speed for Santa Clara County customers is up to 863 Mbps.
Show all download speeds
- 82.9% up to 1,000.0 Mbps
- 0.3% up to 300.0 Mbps
- 16.9% up to 200.0 Mbps
Sail Internet DSL upload speeds
In Santa Clara County download speeds tend to be faster than than upload speeds for Sail Internet DSL. Compared to other ISPs, Sail Internet is below average where upload speeds are concerned, and the fastest compared to other Santa Clara County DSL providers. Sail Internet offers 3 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Santa Clara County is up to 1,000 Mbps. Some customers have slower plan choices, which only go up to 100 Mbps. On average, Sail Internet customers can get speeds up to 846 Mbps.
Show all upload speeds
- 82.9% up to 1,000.0 Mbps
- 0.3% up to 200.0 Mbps
- 16.9% up to 100.0 Mbps
Frontier Communications DSL in Santa Clara County, CA
Frontier DSL coverage
About 3.01%, or 58,283 people, have Frontier DSL internet available to them in the county. The company covers the southeast, south, and southwest Santa Clara County area. Frontier is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Santa Clara County.
Frontier Communications DSL download speeds
Frontier is below average when comparing download speeds to all other internet providers in Santa Clara County. Versus other DSL providers in the area, Frontier DSL is below average. There are 6 different maximum speeds throughout Santa Clara County. The fastest plan anyone in Santa Clara County can order from Frontier goes up to 115 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Santa Clara County customers is up to 24 Mbps.
Show all download speeds
- 7.1% up to 115.0 Mbps
- 5.9% up to 90.0 Mbps
- 2.2% up to 70.0 Mbps
- 2.3% up to 45.0 Mbps
- 0.5% up to 25.0 Mbps
- 81.9% up to 10.0 Mbps
Frontier Communications DSL upload speeds
In Santa Clara County download speeds tend to be faster than than upload speeds for Frontier DSL. Compared to other ISPs, Frontier is the slowest where upload speeds are concerned, and the slowest compared to other Santa Clara County DSL providers. Frontier offers 7 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Santa Clara County is up to 12 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Frontier customers can get speeds up to 1.8 Mbps.
Show all upload speeds
- 0.5% up to 12.0 Mbps
- 0.1% up to 8.0 Mbps
- 6.5% up to 7.0 Mbps
- 0.4% up to 6.0 Mbps
- 5.7% up to 5.0 Mbps
- 4.9% up to 3.0 Mbps
- 81.9% up to 1.0 Mbps
Santa Clara County DSL by Area
This information is most helpful to those looking for homes or considering moving to Santa Clara County or any of the areas nearby.
How does DSL internet in Santa Clara County compare to the rest of California?
DSL internet speeds in Santa Clara County are much faster versus the average speeds in California: 0.00 Mbps in California versus 106 Mbps in the county. The state has similar DSL availability compared to the county. Average DSL coverage in California is 0.00% versus 81.33% in Santa Clara County.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Santa Clara County are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does DSL internet look like in other counties?
Below are counties nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Counties
- Merced County, CA: less DSL coverage, slower speeds
- Montezuma County, CO: more DSL coverage, slower speeds
- La Plata County, CO: more DSL coverage, slower speeds
- Archuleta County, CO: more DSL coverage, slower speeds
- Alamosa County, CO: more DSL coverage, slower speeds
- Costilla County, CO: less DSL coverage, slower speeds
- Baca County, CO: less DSL coverage, slower speeds
- Haskell County, KS: less DSL coverage, slower speeds
- Clark County, KS: less DSL coverage, slower speeds
- Comanche County, KS: less DSL coverage, slower speeds
Counties with Similar Populations
- Miami-Dade County, FL: more DSL coverage, slower speeds
- Kings County, NY: less DSL coverage, slower speeds
- Dallas County, TX: less DSL coverage, slower speeds
- Riverside County, CA: less DSL coverage, slower speeds
- Gwinnett County, GA: less DSL coverage, slower speeds
- Allegheny County, PA: less DSL coverage, slower speeds
- Hennepin County, MN: less DSL coverage, slower speeds
- Hillsborough County, FL: less DSL coverage, slower speeds
- Honolulu County, HI: less DSL coverage, slower speeds
- King County, WA: less DSL coverage, slower speeds