In Castle there are 4 residential DSL providers covering 45.55% of the city. The average home can get speeds up to 16 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 Castle, OK.
To see availability maps for all providers including fiber, cable, DSL, and more in Castle, OK please click below.
DSL Internet Service Providers in Castle
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 Castle are not shown.
Castle 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 Castle is DSL internet available?
DSL Internet Availability Key
DSL is available in 45.55% of Castle. 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 Castle above to see who has service at your home.
How fast is DSL internet in Castle?
The map below shows maximum DSL internet speeds by area in Castle.
DSL Internet Speed Key
The average Castle home can get up to 16 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 100 Mbps, which 2.92% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 42.63% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Castle.
DSL internet speeds tend to be faster in the north parts of Castle, and slower in the southeast areas of the city.
Is DSL the fastest internet I can get in Castle?
The fastest internet for you may vary based on where in Castle you live. In general, fiber competes most often with DSL in the city.
- Fiber is the fastest internet type for 87.74% of Castle homes.
- Cable is fastest for less than 1% of the city.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 12.26%.
- Satellite internet may be the only option for less than 1% of Castle homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Castle, along with details on where in Castle and at what speeds.
AT&T DSL in Castle, OK
AT&T DSL coverage
About 36.93%, or 253 people, have AT&T DSL internet available to them in the city. The company covers the southeast, east, and central Castle area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in some of Castle.
AT&T DSL download speeds
AT&T is one of the slowest when comparing download speeds to all other internet providers in Castle. Versus other DSL providers in the area, AT&T DSL is one of the slowest. There are no different maximum speeds throughout Castle. The fastest plan anyone in Castle can order from AT&T goes up to 10 Mbps, and all Castle customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
AT&T DSL upload speeds
In Castle 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 slowest compared to other Castle DSL providers. AT&T offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Castle 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 Castle, OK
EarthLink DSL coverage
About 36.93%, or 253 people, have EarthLink DSL internet available to them in the city. The company covers the southeast, east, and central Castle area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in some of Castle.
EarthLink DSL download speeds
EarthLink is one of the slowest when comparing download speeds to all other internet providers in Castle. Versus other DSL providers in the area, EarthLink DSL is one of the slowest. There are no different maximum speeds throughout Castle. The fastest plan anyone in Castle can order from EarthLink goes up to 10 Mbps, and all Castle customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
EarthLink DSL upload speeds
In Castle 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 slowest compared to other Castle DSL providers. EarthLink offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Castle is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
Central Oklahoma Telephone Company DSL in Castle, OK
Central Oklahoma Telephone Company DSL coverage
About 5.69%, or 39 people, have Central Oklahoma Telephone Company DSL internet available to them in the city. The company covers the west, central, northwest, and north Castle area. Central Oklahoma Telephone Company is a small internet service provider internet service providers in the US, with internet service available in a very small piece of Castle.
Central Oklahoma Telephone Company DSL download speeds
Central Oklahoma Telephone Company is one of the slowest when comparing download speeds to all other internet providers in Castle. Versus other DSL providers in the area, Central Oklahoma Telephone Company DSL is one of the slowest. There are no different maximum speeds throughout Castle. The fastest plan anyone in Castle can order from Central Oklahoma Telephone Company goes up to 10 Mbps, and all Castle customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
Central Oklahoma Telephone Company DSL upload speeds
In Castle download speeds tend to be faster than than upload speeds for Central Oklahoma Telephone Company DSL. Compared to other ISPs, Central Oklahoma Telephone Company is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Castle DSL providers. Central Oklahoma Telephone Company offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Castle is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
Windstream DSL in Castle, OK
Windstream DSL coverage
About 2.92%, or 20 people, have Windstream DSL internet available to them in the city. The company covers the north Castle area. Windstream is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Castle.
Windstream DSL download speeds
Windstream is below average when comparing download speeds to all other internet providers in Castle. Versus other DSL providers in the area, Windstream DSL is the fastest. There are no different maximum speeds throughout Castle. The fastest plan anyone in Castle can order from Windstream goes up to 100 Mbps, and all Castle customers can get this speed.
Show all download speeds
- 100.0% up to 100.0 Mbps
Windstream DSL upload speeds
In Castle download speeds tend to be faster than than upload speeds for Windstream DSL. Compared to other ISPs, Windstream is below average where upload speeds are concerned, and the fastest compared to other Castle DSL providers. Windstream offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Castle is up to 17 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 17.0 Mbps
Castle DSL by Area
This information is most helpful to those looking for homes or considering moving to Castle or any of the areas nearby.
How does DSL internet in Castle compare to the rest of Oklahoma?
DSL internet speeds in Castle are much faster versus the average speeds in Oklahoma: 0.00 Mbps in Oklahoma versus 16 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in Oklahoma is 0.00% versus 45.55% in Castle.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Castle 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
- Okemah, OK: more DSL coverage, slower speeds
- IXL, OK: more DSL coverage, slower speeds
- Morse, OK: less DSL coverage, slower speeds
- Boley, OK: less DSL coverage, faster speeds
- Schoolton, OK: less DSL coverage, slower speeds
- Mason, OK: less DSL coverage, slower speeds
- Clearview, OK: less DSL coverage, slower speeds
- Cromwell, OK: less DSL coverage, slower speeds
- Paden, OK: more DSL coverage, faster speeds
- Weleetka, OK: more DSL coverage, slower speeds
Cities with Similar Populations
- East Tallassee, AL: less DSL coverage, slower speeds
- Ontario on the Lake, NY: more DSL coverage, slower speeds
- Gadsden, AZ: less DSL coverage, slower speeds
- Friendship, NC: less DSL coverage, faster speeds
- Omar, WV: more DSL coverage, faster speeds
- James Creek, PA: more DSL coverage, faster speeds
- Frametown, WV: more DSL coverage, faster speeds
- Sollitt, IL: less DSL coverage, slower speeds
- Enders, AR: more DSL coverage, faster speeds
- Ellenboro, WV: less DSL coverage, slower speeds