In Custer there are 7 residential internet providers covering 99.69% of the city. The average home can get speeds up to 978 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.
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7 Internet Service Providers in Custer
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 Custer are not shown.
Custer 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
Availability maps for all providers in Custer
Using the dropdown below, please select a provider. Green indicates nearly all homes have service, red indicates few homes have service, and blank indicates no service.
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Internet service is available in 99.69% of Custer. Using our interactive availability map, you can compare service areas for different providers, we include fiber, cable, DSL, or fixed wireless internet service for all providers who offer it. You will notice that some providers might be listed multiple times for each service. If you find no providers cover the location you're looking at, you can opt for satellite service. The most widely available provider is Golden West Telecommunications. Now you can call companies in Custer with more confidence that they might be available.
How fast are internet speeds in Custer?
The map below shows maximum internet speeds by area in Custer.
Internet Speed Key
The average Custer home can get up to 978 Mbps on their internet plan. For most people, the fastest download speed in the city is 1,000 Mbps, which 97.29% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, less than 1% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Custer.
Internet speeds tend to be faster in the central parts of Custer, and slower in the northwest areas of the city.
What type of internet should I choose in Custer?
The fastest internet for you may vary based on where in Custer you live. If speed is your main concern, fiber will be the fastest internet in the city.
- Fiber is the fastest internet type for 97.29% of Custer homes.
- Cable is fastest for less than 1% of the city.
- DSL is fastest for 1.10%.
- Fixed wireless is fastest for 1.30%.
- Satellite internet may be the only option for less than 1% of Custer homes.
Internet Market Health in Custer
Internet Competition Key
The map shows how competitive the Custer internet service market is. Areas in green have more alternatives, areas in yellow have a few choices, and areas in red may have only one provider. More competition usually means faster speeds and better prices for you, the customer.
Below are quick facts on internet competition and market health in Custer based on what connections the average home has availabile:
- Average number of internet service providers to a home: 4.0 (unhealthy)
- Average types of service (fiber, cable, DSL, etc): 2.2 (unhealthy)
- Average providers with broadband (25 Mbps+) speeds: 3.9 (unhealthy)
Overall, competition is unhealthy.
Custer internet customers have the ability to buy internet service from 1 to 6 different providers, depending on where they live. For different types of service, Custer homes have between 1 and 3 options. The type(s) of service available are fiber, fixed wireless, and dsl, though these may vary depending on the region within the city.
When it comes to broadband download speeds faster than 25 Mbps, the situation is worse. Custer internet customers who want faster speeds have between 0 and 6 choices of companies offering speeds up to or over 25 Mbps.
More internet companies with faster speeds means fewer monopolies and better prices for customers. In promoting a free market for internet, Custer needs improvement.
TV & Internet Providers in Depth
Below you'll find which TV and internet providers offer service in Custer, along with details on where in Custer and at what speeds.
Golden West Telecommunications Fiber in Custer, SD
Golden West Telecommunications fiber coverage
About 96.89%, or 3,432 people, have Golden West Telecommunications fiber internet available to them in the city. The company covers the entire Custer area. Golden West Telecommunications is a large internet service provider internet service providers in the US, with internet service available in most of Custer.
Golden West Telecommunications fiber download speeds
Golden West Telecommunications is one of the fastest when comparing download speeds to all other internet providers in Custer. Versus other fiber providers in the area, Golden West Telecommunications fiber is one of the fastest. There are no different maximum speeds throughout Custer. The fastest plan anyone in Custer can order from Golden West Telecommunications goes up to 1,000 Mbps, and all Custer customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Golden West Telecommunications fiber upload speeds
In Custer download speeds tend to be equal to than upload speeds for Golden West Telecommunications fiber. Compared to other ISPs, Golden West Telecommunications is one of the fastest where upload speeds are concerned, and one of the fastest compared to other Custer fiber providers. Golden West Telecommunications offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Custer is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
Golden West Telecommunications DSL in Custer, SD
Golden West Telecommunications DSL coverage
About 21.23%, or 752 people, have Golden West Telecommunications DSL internet available to them in the city. The company covers the southeast, northwest, northeast, southwest, and west Custer area. Golden West Telecommunications is a large internet service provider internet service providers in the US, with internet service available in a small portion of Custer.
Golden West Telecommunications DSL download speeds
Golden West Telecommunications is below average when comparing download speeds to all other internet providers in Custer. Versus other DSL providers in the area, Golden West Telecommunications DSL is the fastest. There are 2 different maximum speeds throughout Custer. The fastest plan anyone in Custer can order from Golden West Telecommunications goes up to 25 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Custer customers is up to 20 Mbps.
Show all download speeds
- 66.2% up to 25.0 Mbps
- 33.8% up to 10.0 Mbps
Golden West Telecommunications DSL upload speeds
In Custer download speeds tend to be faster than than upload speeds for Golden West Telecommunications DSL. Compared to other ISPs, Golden West Telecommunications is below average where upload speeds are concerned, and the fastest compared to other Custer DSL providers. Golden West Telecommunications offers 2 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 Custer is up to 3.0 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Golden West Telecommunications customers can get speeds up to 2.3 Mbps.
Show all upload speeds
- 66.2% up to 3.0 Mbps
- 33.8% up to 1.0 Mbps
Mt. Rushmore Telephone Company Fiber in Custer, SD
Mt. Rushmore Telephone Company fiber coverage
About 1.98%, or 70 people, have Mt. Rushmore Telephone Company fiber internet available to them in the city. The company covers the southeast and northeast Custer area. Mt. Rushmore Telephone Company is a small internet service provider internet service providers in the US, with internet service available in a very small piece of Custer.
Mt. Rushmore Telephone Company fiber download speeds
Mt. Rushmore Telephone Company is one of the fastest when comparing download speeds to all other internet providers in Custer. Versus other fiber providers in the area, Mt. Rushmore Telephone Company fiber is one of the fastest. There are no different maximum speeds throughout Custer. The fastest plan anyone in Custer can order from Mt. Rushmore Telephone Company goes up to 1,000 Mbps, and all Custer customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Mt. Rushmore Telephone Company fiber upload speeds
In Custer download speeds tend to be equal to than upload speeds for Mt. Rushmore Telephone Company fiber. Compared to other ISPs, Mt. Rushmore Telephone Company is one of the fastest where upload speeds are concerned, and one of the fastest compared to other Custer fiber providers. Mt. Rushmore Telephone Company offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Custer is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
T-Mobile Home Internet Fixed Wireless in Custer, SD
T-Mobile Home Internet fixed wireless coverage
About 94.86%, or 3,360 people, have T-Mobile Home Internet fixed wireless internet available to them in the city. The company covers the entire Custer area. T-Mobile Home Internet is one of the largest internet service providers internet service providers in the US, with internet service available in most of Custer.
T-Mobile Home Internet fixed wireless download speeds
T-Mobile Home Internet is below average when comparing download speeds to all other internet providers in Custer. Versus other fixed wireless providers in the area, T-Mobile Home Internet fixed wireless is the slowest. There are 2 different maximum speeds throughout Custer. The fastest plan anyone in Custer can order from T-Mobile Home Internet goes up to 100 Mbps, the slowest package only goes up to 25 Mbps, and the city-wide average maximum speed for Custer customers is up to 58 Mbps.
Show all download speeds
- 44.3% up to 100.0 Mbps
- 55.7% up to 25.0 Mbps
T-Mobile Home Internet fixed wireless upload speeds
In Custer download speeds tend to be faster than than upload speeds for T-Mobile Home Internet fixed wireless. Compared to other ISPs, T-Mobile Home Internet is below average where upload speeds are concerned, and the slowest compared to other Custer fixed wireless providers. T-Mobile Home Internet offers 2 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 Custer is up to 20 Mbps. Some customers have slower plan choices, which only go up to 3.0 Mbps. On average, T-Mobile Home Internet customers can get speeds up to 11 Mbps.
Show all upload speeds
- 44.3% up to 20.0 Mbps
- 55.7% up to 3.0 Mbps
EarthLink Fixed Wireless in Custer, SD
EarthLink fixed wireless coverage
About 88.57%, or 3,137 people, have EarthLink fixed wireless internet available to them in the city. The company covers the entire Custer area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in most of Custer.
EarthLink fixed wireless download speeds
EarthLink is below average when comparing download speeds to all other internet providers in Custer. Versus other fixed wireless providers in the area, EarthLink fixed wireless is below average. There are 2 different maximum speeds throughout Custer. The fastest plan anyone in Custer can order from EarthLink goes up to 100 Mbps, the slowest package only goes up to 25 Mbps, and the city-wide average maximum speed for Custer customers is up to 71 Mbps.
Show all download speeds
- 61.0% up to 100.0 Mbps
- 39.0% up to 25.0 Mbps
EarthLink fixed wireless upload speeds
In Custer download speeds tend to be faster than than upload speeds for EarthLink fixed wireless. Compared to other ISPs, EarthLink is below average where upload speeds are concerned, and average compared to other Custer fixed wireless providers. EarthLink offers 2 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 Custer is up to 20 Mbps. Some customers have slower plan choices, which only go up to 3.0 Mbps. On average, EarthLink customers can get speeds up to 13 Mbps.
Show all upload speeds
- 61.0% up to 20.0 Mbps
- 39.0% up to 3.0 Mbps
AT&T Fixed Wireless in Custer, SD
AT&T fixed wireless coverage
About 88.57%, or 3,137 people, have AT&T fixed wireless internet available to them in the city. The company covers the entire Custer area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in most of Custer.
AT&T fixed wireless download speeds
AT&T is below average when comparing download speeds to all other internet providers in Custer. Versus other fixed wireless providers in the area, AT&T fixed wireless is below average. There are 2 different maximum speeds throughout Custer. The fastest plan anyone in Custer can order from AT&T goes up to 100 Mbps, the slowest package only goes up to 25 Mbps, and the city-wide average maximum speed for Custer customers is up to 71 Mbps.
Show all download speeds
- 61.0% up to 100.0 Mbps
- 39.0% up to 25.0 Mbps
AT&T fixed wireless upload speeds
In Custer download speeds tend to be faster than than upload speeds for AT&T fixed wireless. Compared to other ISPs, AT&T is below average where upload speeds are concerned, and average compared to other Custer fixed wireless providers. AT&T offers 2 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 Custer is up to 20 Mbps. Some customers have slower plan choices, which only go up to 3.0 Mbps. On average, AT&T customers can get speeds up to 13 Mbps.
Show all upload speeds
- 61.0% up to 20.0 Mbps
- 39.0% up to 3.0 Mbps
Custer Internet by Area
This information is most helpful to those looking for homes or considering moving to Custer or any of the areas nearby.
How does internet in Custer compare to the rest of South Dakota?
Internet speeds in Custer are slower versus the average speeds in South Dakota: 1,953 Mbps in South Dakota versus 978 Mbps in the city. The state has similar internet availability compared to the city. Average internet coverage in South Dakota is 98.12% versus 99.69% in Custer.
What zip codes have widespread internet?
Internet coverage varies by zip code and neighborhood. Some examples in or around Custer are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does internet service 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
- Sanator, SD: more internet coverage, slower speeds
- Pringle, SD: more internet coverage, faster speeds
- Hill City, SD: less internet coverage, slower speeds
- Keystone, SD: less internet coverage, slower speeds
- Fairburn, SD: more internet coverage, slower speeds
- Hermosa, SD: less internet coverage, faster speeds
- Minnekahta, SD: less internet coverage, faster speeds
- Silver City, SD: more internet coverage, slower speeds
- Mystic, SD: less internet coverage, slower speeds
- Buffalo Gap, SD: more internet coverage, faster speeds
Cities with Similar Populations
- Ethridge, TN: less internet coverage, slower speeds
- Manchester, OH: less internet coverage, slower speeds
- Fort Recovery, OH: more internet coverage, faster speeds
- Dassel, MN: less internet coverage, faster speeds
- Scotland Neck, NC: less internet coverage, faster speeds
- Center Barnstead, NH: more internet coverage, faster speeds
- Bethel Acres, OK: more internet coverage, faster speeds
- Bainbridge, OH: more internet coverage, slower speeds
- Section, AL: more internet coverage, faster speeds
- Robert, LA: less internet coverage, faster speeds