In Altadena there are 3 residential DSL providers covering 80.90% of the city. The average home can get speeds up to 68 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 Altadena, CA.
To see availability maps for all providers including fiber, cable, DSL, and more in Altadena, CA please click below.
Altadena, CA Availability Maps
DSL Internet Service Providers in Altadena
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 Altadena are not shown.
Altadena 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 Altadena is DSL internet available?
DSL Internet Availability Key
DSL is available in 80.90% of Altadena. 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 Altadena above to see who has service at your home.
How fast is DSL internet in Altadena?
The map below shows maximum DSL internet speeds by area in Altadena.
DSL Internet Speed Key
The average Altadena home can get up to 68 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 120 Mbps, which 1.59% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 7.65% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Altadena.
DSL internet speeds tend to be faster in the southwest parts of Altadena, and slower in the northeast areas of the city.
Is DSL the fastest internet I can get in Altadena?
The fastest internet for you may vary based on where in Altadena you live. In general, fiber competes most often with DSL in the city.
- Fiber is the fastest internet type for 91.79% of Altadena homes.
- Cable is fastest for 7.61% 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 Altadena homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Altadena, along with details on where in Altadena and at what speeds.
AT&T DSL in Altadena, CA
AT&T DSL coverage
About 80.90%, or 30,052 people, have AT&T DSL internet available to them in the city. The company covers the entire Altadena area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in much of Altadena.
AT&T DSL download speeds
AT&T is below average when comparing download speeds to all other internet providers in Altadena. Versus other DSL providers in the area, AT&T DSL is one of the slowest. There are 5 different maximum speeds throughout Altadena. The fastest plan anyone in Altadena 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 Altadena customers is up to 67 Mbps.
Show all download speeds
- 44.3% up to 100.0 Mbps
- 9.2% up to 75.0 Mbps
- 24.3% up to 50.0 Mbps
- 12.8% up to 25.0 Mbps
- 9.5% up to 10.0 Mbps
AT&T DSL upload speeds
In Altadena 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 Altadena 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 Altadena 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 14 Mbps.
Show all upload speeds
- 53.4% up to 20.0 Mbps
- 24.3% up to 10.0 Mbps
- 12.8% up to 5.0 Mbps
- 9.5% up to 1.0 Mbps
EarthLink DSL in Altadena, CA
EarthLink DSL coverage
About 80.90%, or 30,052 people, have EarthLink DSL internet available to them in the city. The company covers the entire Altadena area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in much of Altadena.
EarthLink DSL download speeds
EarthLink is below average when comparing download speeds to all other internet providers in Altadena. Versus other DSL providers in the area, EarthLink DSL is one of the slowest. There are 5 different maximum speeds throughout Altadena. The fastest plan anyone in Altadena 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 Altadena customers is up to 67 Mbps.
Show all download speeds
- 44.3% up to 100.0 Mbps
- 9.2% up to 75.0 Mbps
- 24.3% up to 50.0 Mbps
- 12.8% up to 25.0 Mbps
- 9.5% up to 10.0 Mbps
EarthLink DSL upload speeds
In Altadena 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 Altadena 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 Altadena 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 14 Mbps.
Show all upload speeds
- 53.4% up to 20.0 Mbps
- 24.3% up to 10.0 Mbps
- 12.8% up to 5.0 Mbps
- 9.5% up to 1.0 Mbps
ConnectTo Communications DSL in Altadena, CA
ConnectTo Communications DSL coverage
About 1.59%, or 589 people, have ConnectTo Communications DSL internet available to them in the city. The company covers the southeast and south Altadena area. ConnectTo Communications is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Altadena.
ConnectTo Communications DSL download speeds
ConnectTo Communications is below average when comparing download speeds to all other internet providers in Altadena. Versus other DSL providers in the area, ConnectTo Communications DSL is the fastest. There are no different maximum speeds throughout Altadena. The fastest plan anyone in Altadena can order from ConnectTo Communications goes up to 120 Mbps, and all Altadena customers can get this speed.
Show all download speeds
- 100.0% up to 120.0 Mbps
ConnectTo Communications DSL upload speeds
In Altadena download speeds tend to be faster than than upload speeds for ConnectTo Communications DSL. Compared to other ISPs, ConnectTo Communications is below average where upload speeds are concerned, and the fastest compared to other Altadena DSL providers. ConnectTo Communications offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Altadena is up to 20 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 20.0 Mbps
Altadena DSL by Area
This information is most helpful to those looking for homes or considering moving to Altadena or any of the areas nearby.
How does DSL internet in Altadena compare to the rest of California?
DSL internet speeds in Altadena are much faster versus the average speeds in California: 0.00 Mbps in California versus 68 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in California is 0.00% versus 80.90% in Altadena.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Altadena 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
- Pasadena, CA: more DSL coverage, faster speeds
- Kinneloa Mesa, CA: more DSL coverage, slower speeds
- La Canada Flintridge, CA: less DSL coverage, slower speeds
- San Marino, CA: less DSL coverage, slower speeds
- East Pasadena, CA: less DSL coverage, faster speeds
- Sierra Madre, CA: less DSL coverage, slower speeds
- Montrose, CA: more DSL coverage, faster speeds
- South Pasadena, CA: more DSL coverage, faster speeds
- La Crescenta-Montrose, CA: more DSL coverage, faster speeds
- Glendale, CA: more DSL coverage, faster speeds
Cities with Similar Populations
- Arnold, MO: more DSL coverage, faster speeds
- Okeechobee, FL: more DSL coverage, slower speeds
- Newburgh, IN: more DSL coverage, slower speeds
- Manhattan Beach, CA: less DSL coverage, slower speeds
- Lewiston, ME: less DSL coverage, slower speeds
- Carlsbad, NM: more DSL coverage, faster speeds
- Bristol, TN: more DSL coverage, slower speeds
- Trumbull, CT: less DSL coverage, slower speeds
- Willis, TX: less DSL coverage, faster speeds
- Irmo, SC: more DSL coverage, slower speeds