In Cupertino there are 3 residential DSL providers covering 85.70% of the city. The average home can get speeds up to 105 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 Cupertino, CA.
To see availability maps for all providers including fiber, cable, DSL, and more in Cupertino, CA please click below.
Cupertino, CA Availability Maps
DSL Internet Service Providers in Cupertino
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 Cupertino are not shown.
Cupertino 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 Cupertino is DSL internet available?
DSL Internet Availability Key
DSL is available in 85.70% of Cupertino. 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 Cupertino above to see who has service at your home.
How fast is DSL internet in Cupertino?
The map below shows maximum DSL internet speeds by area in Cupertino.
DSL Internet Speed Key
The average Cupertino home can get up to 105 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 1,000 Mbps, which 2.46% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 10.65% of homes can only purchase plans up to 25 Mbps. See the internet provider details below for info about their speed and coverage in Cupertino.
DSL internet speeds tend to be faster in the north parts of Cupertino, and slower in the southeast areas of the city.
Is DSL the fastest internet I can get in Cupertino?
The fastest internet for you may vary based on where in Cupertino you live. In general, fiber competes most often with DSL in the city.
- Fiber is the fastest internet type for 57.36% of Cupertino homes.
- Cable is fastest for 41.76% 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 Cupertino homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Cupertino, along with details on where in Cupertino and at what speeds.
AT&T DSL in Cupertino, CA
AT&T DSL coverage
About 85.08%, or 53,776 people, have AT&T DSL internet available to them in the city. The company covers the entire Cupertino area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in most of Cupertino.
AT&T DSL download speeds
AT&T is below average when comparing download speeds to all other internet providers in Cupertino. Versus other DSL providers in the area, AT&T DSL is one of the slowest. There are 4 different maximum speeds throughout Cupertino. The fastest plan anyone in Cupertino 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 Cupertino customers is up to 78 Mbps.
Show all download speeds
- 54.7% up to 100.0 Mbps
- 16.8% up to 75.0 Mbps
- 16.1% up to 50.0 Mbps
- 12.5% up to 25.0 Mbps
AT&T DSL upload speeds
In Cupertino 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 slowest compared to other Cupertino DSL providers. AT&T offers 3 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 Cupertino is up to 20 Mbps. Some customers have slower plan choices, which only go up to 5.0 Mbps. On average, AT&T customers can get speeds up to 17 Mbps.
Show all upload speeds
- 71.4% up to 20.0 Mbps
- 16.1% up to 10.0 Mbps
- 12.5% up to 5.0 Mbps
EarthLink DSL in Cupertino, CA
EarthLink DSL coverage
About 85.08%, or 53,776 people, have EarthLink DSL internet available to them in the city. The company covers the entire Cupertino area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in most of Cupertino.
EarthLink DSL download speeds
EarthLink is below average when comparing download speeds to all other internet providers in Cupertino. Versus other DSL providers in the area, EarthLink DSL is one of the slowest. There are 4 different maximum speeds throughout Cupertino. The fastest plan anyone in Cupertino 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 Cupertino customers is up to 78 Mbps.
Show all download speeds
- 54.7% up to 100.0 Mbps
- 16.8% up to 75.0 Mbps
- 16.1% up to 50.0 Mbps
- 12.5% up to 25.0 Mbps
EarthLink DSL upload speeds
In Cupertino 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 slowest compared to other Cupertino DSL providers. EarthLink offers 3 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 Cupertino is up to 20 Mbps. Some customers have slower plan choices, which only go up to 5.0 Mbps. On average, EarthLink customers can get speeds up to 17 Mbps.
Show all upload speeds
- 71.4% up to 20.0 Mbps
- 16.1% up to 10.0 Mbps
- 12.5% up to 5.0 Mbps
Sail Internet DSL in Cupertino, CA
Sail Internet DSL coverage
About 2.46%, or 1,556 people, have Sail Internet DSL internet available to them in the city. The company covers the north and central Cupertino 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 Cupertino.
Sail Internet DSL download speeds
Sail Internet is average when comparing download speeds to all other internet providers in Cupertino. Versus other DSL providers in the area, Sail Internet DSL is the fastest. There are no different maximum speeds throughout Cupertino. The fastest plan anyone in Cupertino can order from Sail Internet goes up to 1,000 Mbps, and all Cupertino customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Sail Internet DSL upload speeds
In Cupertino download speeds tend to be equal to than upload speeds for Sail Internet DSL. Compared to other ISPs, Sail Internet is above average where upload speeds are concerned, and the fastest compared to other Cupertino DSL providers. Sail Internet offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Cupertino is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
Cupertino DSL by Area
This information is most helpful to those looking for homes or considering moving to Cupertino or any of the areas nearby.
How does DSL internet in Cupertino compare to the rest of California?
DSL internet speeds in Cupertino are much faster versus the average speeds in California: 0.00 Mbps in California versus 105 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in California is 0.00% versus 85.70% in Cupertino.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Cupertino 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 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
- Saratoga, CA: more DSL coverage, slower speeds
- Sunnyvale, CA: less DSL coverage, slower speeds
- Santa Clara, CA: more DSL coverage, faster speeds
- Los Altos, CA: more DSL coverage, slower speeds
- Campbell, CA: less DSL coverage, slower speeds
- Mountain View, CA: more DSL coverage, slower speeds
- Monte Sereno, CA: less DSL coverage, slower speeds
- Los Altos Hills, CA: more DSL coverage, slower speeds
- Los Gatos, CA: less DSL coverage, slower speeds
- Alviso, CA: less DSL coverage, slower speeds
Cities with Similar Populations
- San Clemente, CA: less DSL coverage, slower speeds
- Orland Park, IL: more DSL coverage, slower speeds
- Rowlett, TX: less DSL coverage, slower speeds
- Kannapolis, NC: more DSL coverage, faster speeds
- Kapolei, HI: less DSL coverage, slower speeds
- Woodland, CA: more DSL coverage, faster speeds
- West Hartford, CT: less DSL coverage, slower speeds
- Rocky Mount, NC: less DSL coverage, slower speeds
- Pottstown, PA: less DSL coverage, slower speeds
- Port Orange, FL: less DSL coverage, slower speeds