In Sulphur there is 1 residential DSL provider covering 93.75% of the city. The average home can get speeds up to 62 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 Sulphur, SD.
To see availability maps for all providers including fiber, cable, DSL, and more in Sulphur, SD please click below.
DSL Internet Service Provider in Sulphur
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 Sulphur are not shown.
Sulphur 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 Sulphur is DSL internet available?
DSL Internet Availability Key
DSL is available in 93.75% of Sulphur. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is Centurylink. Call one of the companies with service in Sulphur above to see who has service at your home.
How fast is DSL internet in Sulphur?
The map below shows maximum DSL internet speeds by area in Sulphur.
DSL Internet Speed Key
The average Sulphur home can get up to 62 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 100 Mbps, which 35.17% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 2.01% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Sulphur.
DSL internet speeds tend to be faster in the northeast parts of Sulphur, and slower in the southeast areas of the city.
Is DSL the fastest internet I can get in Sulphur?
The fastest internet for you may vary based on where in Sulphur you live. In general, cable competes most often with DSL in the city.
- Fiber is the fastest internet type for 28.81% of Sulphur homes.
- Cable is fastest for 58.58% of the city.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 12.61%.
- Satellite internet may be the only option for less than 1% of Sulphur homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Sulphur, along with details on where in Sulphur and at what speeds.
Centurylink DSL in Sulphur, SD
Centurylink DSL coverage
About 93.75%, or 885 people, have Centurylink DSL internet available to them in the city. The company covers the entire Sulphur area. Centurylink is one of the largest internet service providers internet service providers in the US, with internet service available in most of Sulphur.
Centurylink DSL download speeds
Centurylink is below average when comparing download speeds to all other internet providers in Sulphur. Versus other DSL providers in the area, Centurylink DSL is the fastest. There are 3 different maximum speeds throughout Sulphur. The fastest plan anyone in Sulphur can order from Centurylink goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Sulphur customers is up to 62 Mbps.
Show all download speeds
- 37.5% up to 100.0 Mbps
- 60.3% up to 40.0 Mbps
- 2.1% up to 10.0 Mbps
Centurylink DSL upload speeds
In Sulphur download speeds tend to be faster than than upload speeds for Centurylink DSL. Compared to other ISPs, Centurylink is below average where upload speeds are concerned, and the fastest compared to other Sulphur DSL providers. Centurylink 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 Sulphur is up to 10 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Centurylink customers can get speeds up to 5.6 Mbps.
Show all upload speeds
- 37.5% up to 10.0 Mbps
- 60.3% up to 3.0 Mbps
- 2.1% up to 1.0 Mbps
Sulphur DSL by Area
This information is most helpful to those looking for homes or considering moving to Sulphur or any of the areas nearby.
How does DSL internet in Sulphur compare to the rest of South Dakota?
DSL internet speeds in Sulphur are much faster versus the average speeds in South Dakota: 0.00 Mbps in South Dakota versus 62 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in South Dakota is 0.00% versus 93.75% in Sulphur.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Sulphur 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
- Rapid City, SD: more DSL coverage, slower speeds
- Black Hawk, SD: less DSL coverage, slower speeds
- Ashland Heights, SD: more DSL coverage, slower speeds
- Rapid Valley, SD: more DSL coverage, slower speeds
- Summerset, SD: less DSL coverage, slower speeds
- Box Elder, SD: less DSL coverage, slower speeds
- Ellsworth Afb, SD: less DSL coverage, slower speeds
- Piedmont, SD: less DSL coverage, slower speeds
- Johnson Siding, SD: more DSL coverage, faster speeds
- Bethlehem, SD: less DSL coverage, slower speeds
Cities with Similar Populations
- Escabosa, NM: more DSL coverage, faster speeds
- Thrall, WA: more DSL coverage, slower speeds
- Thompson, PA: less DSL coverage, slower speeds
- Tatnic, ME: less DSL coverage, slower speeds
- Footville, WI: more DSL coverage, faster speeds
- Fall River Mills, CA: more DSL coverage, slower speeds
- Everton, IN: more DSL coverage, slower speeds
- Eugene, MO: less DSL coverage, slower speeds
- Turtlepoint, PA: less DSL coverage, slower speeds
- Enid, MS: less DSL coverage, slower speeds