In Alamo there are 3 residential DSL providers covering 93.64% of the city. The average home can get speeds up to 111 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 Alamo, CA.
To see availability maps for all providers including fiber, cable, DSL, and more in Alamo, CA please click below.
DSL Internet Service Providers in Alamo
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 Alamo are not shown.
Alamo 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 Alamo is DSL internet available?
DSL Internet Availability Key
DSL is available in 93.64% of Alamo. 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 Alamo above to see who has service at your home.
How fast is DSL internet in Alamo?
The map below shows maximum DSL internet speeds by area in Alamo.
DSL Internet Speed Key
The average Alamo home can get up to 111 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 1,000 Mbps, which 1.49% 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 Alamo.
DSL internet speeds tend to be faster in the northwest parts of Alamo, and slower in the south areas of the city.
Is DSL the fastest internet I can get in Alamo?
The fastest internet for you may vary based on where in Alamo you live. In general, cable competes most often with DSL in the city.
- Fiber is the fastest internet type for 40.79% of Alamo homes.
- Cable is fastest for 59.21% 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 Alamo homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Alamo, along with details on where in Alamo and at what speeds.
AT&T DSL in Alamo, CA
AT&T DSL coverage
About 93.64%, or 14,977 people, have AT&T DSL internet available to them in the city. The company covers the entire Alamo area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in most of Alamo.
AT&T DSL download speeds
AT&T is below average when comparing download speeds to all other internet providers in Alamo. Versus other DSL providers in the area, AT&T DSL is one of the slowest. There are 4 different maximum speeds throughout Alamo. The fastest plan anyone in Alamo 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 Alamo customers is up to 96 Mbps.
Show all download speeds
- 91.2% up to 100.0 Mbps
- 3.8% up to 75.0 Mbps
- 4.2% up to 50.0 Mbps
- 0.9% up to 25.0 Mbps
AT&T DSL upload speeds
In Alamo 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 Alamo 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 Alamo 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 19 Mbps.
Show all upload speeds
- 94.9% up to 20.0 Mbps
- 4.2% up to 10.0 Mbps
- 0.9% up to 5.0 Mbps
EarthLink DSL in Alamo, CA
EarthLink DSL coverage
About 93.64%, or 14,977 people, have EarthLink DSL internet available to them in the city. The company covers the entire Alamo area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in most of Alamo.
EarthLink DSL download speeds
EarthLink is below average when comparing download speeds to all other internet providers in Alamo. Versus other DSL providers in the area, EarthLink DSL is one of the slowest. There are 4 different maximum speeds throughout Alamo. The fastest plan anyone in Alamo 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 Alamo customers is up to 96 Mbps.
Show all download speeds
- 91.2% up to 100.0 Mbps
- 3.8% up to 75.0 Mbps
- 4.2% up to 50.0 Mbps
- 0.9% up to 25.0 Mbps
EarthLink DSL upload speeds
In Alamo 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 Alamo 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 Alamo 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 19 Mbps.
Show all upload speeds
- 94.9% up to 20.0 Mbps
- 4.2% up to 10.0 Mbps
- 0.9% up to 5.0 Mbps
Astound Broadband DSL in Alamo, CA
Astound Broadband DSL coverage
About 1.49%, or 238 people, have Astound Broadband DSL internet available to them in the city. The company covers the northwest Alamo area. Astound Broadband is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Alamo.
Astound Broadband DSL download speeds
Astound Broadband is below average when comparing download speeds to all other internet providers in Alamo. Versus other DSL providers in the area, Astound Broadband DSL is the fastest. There are no different maximum speeds throughout Alamo. The fastest plan anyone in Alamo can order from Astound Broadband goes up to 1,000 Mbps, and all Alamo customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Astound Broadband DSL upload speeds
In Alamo download speeds tend to be faster than than upload speeds for Astound Broadband DSL. Compared to other ISPs, Astound Broadband is the slowest where upload speeds are concerned, and the slowest compared to other Alamo DSL providers. Astound Broadband offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Alamo is up to 10 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 10.0 Mbps
Alamo DSL by Area
This information is most helpful to those looking for homes or considering moving to Alamo or any of the areas nearby.
How does DSL internet in Alamo compare to the rest of California?
DSL internet speeds in Alamo are much faster versus the average speeds in California: 0.00 Mbps in California versus 111 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in California is 0.00% versus 93.64% in Alamo.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Alamo 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
- Castle Hill, CA: less DSL coverage, faster speeds
- Diablo, CA: less DSL coverage, slower speeds
- Walnut Creek, CA: less DSL coverage, faster speeds
- Danville, CA: less DSL coverage, slower speeds
- Lafayette, CA: less DSL coverage, slower speeds
- Moraga, CA: less DSL coverage, slower speeds
- Clayton, CA: less DSL coverage, slower speeds
- Pleasant Hill, CA: less DSL coverage, faster speeds
- Concord, CA: less DSL coverage, faster speeds
- Reliez Valley, CA: less DSL coverage, slower speeds
Cities with Similar Populations
- Vermilion, OH: less DSL coverage, slower speeds
- Sault Ste. Marie, MI: less DSL coverage, slower speeds
- Liberty, SC: less DSL coverage, slower speeds
- Washington, IN: less DSL coverage, slower speeds
- Pineville, NC: less DSL coverage, slower speeds
- Shively, KY: more DSL coverage, slower speeds
- Discovery Bay, CA: less DSL coverage, slower speeds
- Siler City, NC: less DSL coverage, slower speeds
- Merrill, WI: less DSL coverage, slower speeds
- Windham, NH: less DSL coverage, slower speeds