In Castella there are 2 residential DSL providers covering 21.03% of the city. The average home can get speeds up to 10 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 Castella, CA.
To see availability maps for all providers including fiber, cable, DSL, and more in Castella, CA please click below.
Castella, CA Availability Maps
DSL Internet Service Providers in Castella
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 Castella are not shown.
Castella 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 Castella is DSL internet available?
DSL Internet Availability Key
DSL is available in 21.03% of Castella. 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 Castella above to see who has service at your home.
How fast is DSL internet in Castella?
The map below shows maximum DSL internet speeds by area in Castella.
DSL Internet Speed Key
The average Castella home can get up to 10 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 10 Mbps, which 21.03% of residents can get.
Is DSL the fastest internet I can get in Castella?
The fastest internet for you may vary based on where in Castella you live. In general, satellite competes most often with DSL in the city.
- Fiber is the fastest internet type for less than 1% of Castella homes.
- Cable is fastest for 17.76% of the city.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 35.51%.
- Satellite internet may be the only option for 46.73% of Castella homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Castella, along with details on where in Castella and at what speeds.
AT&T DSL in Castella, CA
AT&T DSL coverage
About 21.03%, or 45 people, have AT&T DSL internet available to them in the city. The company covers the northeast and north Castella area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Castella.
AT&T DSL download speeds
AT&T is one of the slowest when comparing download speeds to all other internet providers in Castella. Versus other DSL providers in the area, AT&T DSL is one of the fastest. There are no different maximum speeds throughout Castella. The fastest plan anyone in Castella can order from AT&T goes up to 10 Mbps, and all Castella customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
AT&T DSL upload speeds
In Castella download speeds tend to be faster than than upload speeds for AT&T DSL. Compared to other ISPs, AT&T is one of the slowest where upload speeds are concerned, and one of the fastest compared to other Castella DSL providers. AT&T offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Castella is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
EarthLink DSL in Castella, CA
EarthLink DSL coverage
About 21.03%, or 45 people, have EarthLink DSL internet available to them in the city. The company covers the northeast and north Castella area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Castella.
EarthLink DSL download speeds
EarthLink is one of the slowest when comparing download speeds to all other internet providers in Castella. Versus other DSL providers in the area, EarthLink DSL is one of the fastest. There are no different maximum speeds throughout Castella. The fastest plan anyone in Castella can order from EarthLink goes up to 10 Mbps, and all Castella customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
EarthLink DSL upload speeds
In Castella download speeds tend to be faster than than upload speeds for EarthLink DSL. Compared to other ISPs, EarthLink is one of the slowest where upload speeds are concerned, and one of the fastest compared to other Castella DSL providers. EarthLink offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Castella is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
Castella DSL by Area
This information is most helpful to those looking for homes or considering moving to Castella or any of the areas nearby.
How does DSL internet in Castella compare to the rest of California?
DSL internet speeds in Castella are much faster versus the average speeds in California: 0.00 Mbps in California versus 10 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in California is 0.00% versus 21.03% in Castella.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Castella 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
- Dunsmuir, CA: more DSL coverage, similar speeds
- Shasta Retreat, CA: more DSL coverage, similar speeds
- Mount Shasta, CA: more DSL coverage, faster speeds
- Mccloud, CA: more DSL coverage, faster speeds
- Lakehead, CA: more DSL coverage, similar speeds
- Trinity Center, CA: more DSL coverage, faster speeds
- Big Bend, CA: more DSL coverage, faster speeds
- Weed, CA: more DSL coverage, faster speeds
- Montgomery Creek, CA: more DSL coverage, faster speeds
- Gazelle, CA: less DSL coverage, similar speeds
Cities with Similar Populations
- Routon, LA: more DSL coverage, faster speeds
- Ruggles, PA: more DSL coverage, similar speeds
- Kratzerville, PA: less DSL coverage, similar speeds
- Rugby, IN: more DSL coverage, similar speeds
- La Prairie, IL: less DSL coverage, similar speeds
- Lafourche, LA: less DSL coverage, faster speeds
- Royerton, IN: more DSL coverage, faster speeds
- Lamont, WI: less DSL coverage, faster speeds
- Russell, OH: more DSL coverage, similar speeds
- Lanes Mills, PA: more DSL coverage, faster speeds