In Castine there is 1 residential DSL provider covering 15.46% 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 Castine, ME.
To see availability maps for all providers including fiber, cable, DSL, and more in Castine, ME please click below.
DSL Internet Service Provider in Castine
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 Castine are not shown.
Castine 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 Castine is DSL internet available?
DSL Internet Availability Key
DSL is available in 15.46% of Castine. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is Fidium. Call one of the companies with service in Castine above to see who has service at your home.
How fast is DSL internet in Castine?
The map below shows maximum DSL internet speeds by area in Castine.
DSL Internet Speed Key
The average Castine home can get up to 10 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 10 Mbps, which 15.46% of residents can get.
Is DSL the fastest internet I can get in Castine?
The fastest internet for you may vary based on where in Castine you live. In general, fiber competes most often with DSL in the city.
- Fiber is the fastest internet type for 96.95% of Castine homes.
- Cable is fastest for less than 1% 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 3.05% of Castine homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Castine, along with details on where in Castine and at what speeds.
Fidium Fiber DSL in Castine, ME
Fidium DSL coverage
About 15.46%, or 203 people, have Fidium DSL internet available to them in the city. The company covers the northeast, east, and south Castine area. Fidium is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Castine.
Fidium Fiber DSL download speeds
Fidium is the slowest when comparing download speeds to all other internet providers in Castine. Versus other DSL providers in the area, Fidium DSL is the fastest. There are no different maximum speeds throughout Castine. The fastest plan anyone in Castine can order from Fidium goes up to 10 Mbps, and all Castine customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
Fidium Fiber DSL upload speeds
In Castine download speeds tend to be faster than than upload speeds for Fidium DSL. Compared to other ISPs, Fidium is the slowest where upload speeds are concerned, and the fastest compared to other Castine DSL providers. Fidium offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Castine is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
Castine DSL by Area
This information is most helpful to those looking for homes or considering moving to Castine or any of the areas nearby.
How does DSL internet in Castine compare to the rest of Maine?
DSL internet speeds in Castine are much faster versus the average speeds in Maine: 0.00 Mbps in Maine versus 10 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in Maine is 0.00% versus 15.46% in Castine.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Castine 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
- West Brooksville, ME: more DSL coverage, similar speeds
- Harborside, ME: more DSL coverage, similar speeds
- West Penobscot, ME: more DSL coverage, faster speeds
- Brooksville, ME: more DSL coverage, similar speeds
- South Penobscot, ME: more DSL coverage, similar speeds
- Penobscot, ME: more DSL coverage, faster speeds
- Islesboro, ME: more DSL coverage, similar speeds
- Stockton Springs, ME: more DSL coverage, faster speeds
- Sedgwick, ME: more DSL coverage, faster speeds
- Sargentville, ME: more DSL coverage, similar speeds
Cities with Similar Populations
- Edgar Springs, MO: more DSL coverage, faster speeds
- Oil City, LA: more DSL coverage, similar speeds
- Odessa, WA: more DSL coverage, faster speeds
- New Germany, MN: more DSL coverage, faster speeds
- Geary, OK: more DSL coverage, faster speeds
- Elwood, NE: more DSL coverage, faster speeds
- Opdyke, IL: more DSL coverage, similar speeds
- East Springfield, PA: more DSL coverage, faster speeds
- East Ellijay, GA: more DSL coverage, faster speeds
- DeKalb Junction, NY: more DSL coverage, faster speeds