In Sullivans Island there are 2 residential DSL providers covering 100.00% of the city. The average home can get speeds up to 82 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 Sullivans Island, SC.
To see availability maps for all providers including fiber, cable, DSL, and more in Sullivans Island, SC please click below.
Sullivans Island, SC Availability Maps
DSL Internet Service Providers in Sullivans Island
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 Sullivans Island are not shown.
Sullivans Island 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 Sullivans Island is DSL internet available?
DSL Internet Availability Key
DSL is available in 100.00% of Sullivans Island. 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 Sullivans Island above to see who has service at your home.
How fast is DSL internet in Sullivans Island?
The map below shows maximum DSL internet speeds by area in Sullivans Island.
DSL Internet Speed Key
The average Sullivans Island home can get up to 82 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 100 Mbps, which 66.15% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 8.52% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Sullivans Island.
DSL internet speeds tend to be faster in the north parts of Sullivans Island, and slower in the northeast areas of the city.
Is DSL the fastest internet I can get in Sullivans Island?
The fastest internet for you may vary based on where in Sullivans Island you live. In general, fiber competes most often with DSL in the city.
- Fiber is the fastest internet type for 100.00% of Sullivans Island 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 less than 1% of Sullivans Island homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Sullivans Island, along with details on where in Sullivans Island and at what speeds.
EarthLink DSL in Sullivans Island, SC
EarthLink DSL coverage
About 100.00%, or 2,665 people, have EarthLink DSL internet available to them in the city. The company covers the entire Sullivans Island area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in every corner of Sullivans Island.
EarthLink DSL download speeds
EarthLink is below average when comparing download speeds to all other internet providers in Sullivans Island. Versus other DSL providers in the area, EarthLink DSL is one of the fastest. There are 5 different maximum speeds throughout Sullivans Island. The fastest plan anyone in Sullivans Island can order from EarthLink goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Sullivans Island customers is up to 82 Mbps.
Show all download speeds
- 66.2% up to 100.0 Mbps
- 12.6% up to 75.0 Mbps
- 9.8% up to 50.0 Mbps
- 2.9% up to 25.0 Mbps
- 8.5% up to 10.0 Mbps
EarthLink DSL upload speeds
In Sullivans Island download speeds tend to be faster than than upload speeds for EarthLink DSL. Compared to other ISPs, EarthLink is below average where upload speeds are concerned, and one of the fastest compared to other Sullivans Island DSL providers. EarthLink offers 4 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 Sullivans Island is up to 20 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, EarthLink customers can get speeds up to 17 Mbps.
Show all upload speeds
- 78.8% up to 20.0 Mbps
- 9.8% up to 10.0 Mbps
- 2.9% up to 5.0 Mbps
- 8.5% up to 1.0 Mbps
AT&T DSL in Sullivans Island, SC
AT&T DSL coverage
About 100.00%, or 2,665 people, have AT&T DSL internet available to them in the city. The company covers the entire Sullivans Island area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in every corner of Sullivans Island.
AT&T DSL download speeds
AT&T is below average when comparing download speeds to all other internet providers in Sullivans Island. Versus other DSL providers in the area, AT&T DSL is one of the fastest. There are 5 different maximum speeds throughout Sullivans Island. The fastest plan anyone in Sullivans Island can order from AT&T goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Sullivans Island customers is up to 82 Mbps.
Show all download speeds
- 66.2% up to 100.0 Mbps
- 12.6% up to 75.0 Mbps
- 9.8% up to 50.0 Mbps
- 2.9% up to 25.0 Mbps
- 8.5% up to 10.0 Mbps
AT&T DSL upload speeds
In Sullivans Island download speeds tend to be faster than than upload speeds for AT&T DSL. Compared to other ISPs, AT&T is below average where upload speeds are concerned, and one of the fastest compared to other Sullivans Island DSL providers. AT&T offers 4 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 Sullivans Island is up to 20 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, AT&T customers can get speeds up to 17 Mbps.
Show all upload speeds
- 78.8% up to 20.0 Mbps
- 9.8% up to 10.0 Mbps
- 2.9% up to 5.0 Mbps
- 8.5% up to 1.0 Mbps
Sullivans Island DSL by Area
This information is most helpful to those looking for homes or considering moving to Sullivans Island or any of the areas nearby.
How does DSL internet in Sullivans Island compare to the rest of South Carolina?
DSL internet speeds in Sullivans Island are much faster versus the average speeds in South Carolina: 0.00 Mbps in South Carolina versus 82 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in South Carolina is 0.00% versus 100.00% in Sullivans Island.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Sullivans Island 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
- Isle Of Palms, SC: less DSL coverage, slower speeds
- Mount Pleasant, SC: less DSL coverage, slower speeds
- Charleston, SC: less DSL coverage, slower speeds
- Folly Beach, SC: less DSL coverage, slower speeds
- Johns Island, SC: less DSL coverage, slower speeds
- Charleston Afb, SC: less DSL coverage, slower speeds
- Fenwick Hills, SC: equal DSL coverage, faster speeds
- Legareville, SC: less DSL coverage, slower speeds
- Red Top, SC: less DSL coverage, slower speeds
- Kiawah Island, SC: less DSL coverage, faster speeds
Cities with Similar Populations
- Baird, TX: less DSL coverage, faster speeds
- Lesage, WV: less DSL coverage, slower speeds
- Star Valley, AZ: less DSL coverage, slower speeds
- Frederic, WI: less DSL coverage, faster speeds
- Empire, CA: less DSL coverage, faster speeds
- Duquesne, MO: less DSL coverage, slower speeds
- Creola, AL: less DSL coverage, slower speeds
- Carlisle, AR: less DSL coverage, slower speeds
- Belle Plaine, IA: less DSL coverage, faster speeds
- Pine Lawn, MO: less DSL coverage, slower speeds