In Seabrook Island there are 2 residential DSL providers covering 80.11% of the city. The average home can get speeds up to 68 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 Seabrook Island, SC.
To see availability maps for all providers including fiber, cable, DSL, and more in Seabrook Island, SC please click below.
Seabrook Island, SC Availability Maps
DSL Internet Service Providers in Seabrook 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 Seabrook Island are not shown.
Seabrook 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 Seabrook Island is DSL internet available?
DSL Internet Availability Key
DSL is available in 80.11% of Seabrook 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 Seabrook Island above to see who has service at your home.
How fast is DSL internet in Seabrook Island?
The map below shows maximum DSL internet speeds by area in Seabrook Island.
DSL Internet Speed Key
The average Seabrook Island home can get up to 68 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 100 Mbps, which 45.99% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 16.38% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Seabrook Island.
DSL internet speeds tend to be faster in the south parts of Seabrook Island, and slower in the northeast areas of the city.
Is DSL the fastest internet I can get in Seabrook Island?
The fastest internet for you may vary based on where in Seabrook Island you live. In general, cable competes most often with DSL in the city.
- Fiber is the fastest internet type for less than 1% of Seabrook Island homes.
- Cable is fastest for 99.59% 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 Seabrook Island homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Seabrook Island, along with details on where in Seabrook Island and at what speeds.
EarthLink DSL in Seabrook Island, SC
EarthLink DSL coverage
About 80.11%, or 1,756 people, have EarthLink DSL internet available to them in the city. The company covers the southwest, central, north, east, northeast, and south Seabrook Island area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in much of Seabrook Island.
EarthLink DSL download speeds
EarthLink is below average when comparing download speeds to all other internet providers in Seabrook Island. Versus other DSL providers in the area, EarthLink DSL is one of the fastest. There are 5 different maximum speeds throughout Seabrook Island. The fastest plan anyone in Seabrook 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 Seabrook Island customers is up to 68 Mbps.
Show all download speeds
- 57.4% up to 100.0 Mbps
- 1.4% up to 75.0 Mbps
- 10.3% up to 50.0 Mbps
- 10.5% up to 25.0 Mbps
- 20.4% up to 10.0 Mbps
EarthLink DSL upload speeds
In Seabrook 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 Seabrook 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 Seabrook 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 14 Mbps.
Show all upload speeds
- 58.8% up to 20.0 Mbps
- 10.3% up to 10.0 Mbps
- 10.5% up to 5.0 Mbps
- 20.4% up to 1.0 Mbps
AT&T DSL in Seabrook Island, SC
AT&T DSL coverage
About 80.11%, or 1,756 people, have AT&T DSL internet available to them in the city. The company covers the southwest, central, north, east, northeast, and south Seabrook Island area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in much of Seabrook Island.
AT&T DSL download speeds
AT&T is below average when comparing download speeds to all other internet providers in Seabrook Island. Versus other DSL providers in the area, AT&T DSL is one of the fastest. There are 5 different maximum speeds throughout Seabrook Island. The fastest plan anyone in Seabrook 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 Seabrook Island customers is up to 68 Mbps.
Show all download speeds
- 57.4% up to 100.0 Mbps
- 1.4% up to 75.0 Mbps
- 10.3% up to 50.0 Mbps
- 10.5% up to 25.0 Mbps
- 20.4% up to 10.0 Mbps
AT&T DSL upload speeds
In Seabrook 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 Seabrook 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 Seabrook 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 14 Mbps.
Show all upload speeds
- 58.8% up to 20.0 Mbps
- 10.3% up to 10.0 Mbps
- 10.5% up to 5.0 Mbps
- 20.4% up to 1.0 Mbps
Seabrook Island DSL by Area
This information is most helpful to those looking for homes or considering moving to Seabrook Island or any of the areas nearby.
How does DSL internet in Seabrook Island compare to the rest of South Carolina?
DSL internet speeds in Seabrook Island are much faster versus the average speeds in South Carolina: 0.00 Mbps in South Carolina versus 68 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in South Carolina is 0.00% versus 80.11% in Seabrook Island.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Seabrook 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
- Rockville, SC: more DSL coverage, faster speeds
- Wadmalaw Island, SC: more DSL coverage, faster speeds
- Kiawah Island, SC: more DSL coverage, faster speeds
- Legareville, SC: more DSL coverage, slower speeds
- Yonges Island, SC: more DSL coverage, faster speeds
- Edisto Island, SC: less DSL coverage, slower speeds
- Freedman, SC: less DSL coverage, faster speeds
- Edisto Beach, SC: more DSL coverage, faster speeds
- Rantowles, SC: less DSL coverage, slower speeds
- Folly Beach, SC: more DSL coverage, slower speeds
Cities with Similar Populations
- Belington, WV: more DSL coverage, slower speeds
- Belleville, KS: more DSL coverage, slower speeds
- Benton, MO: less DSL coverage, slower speeds
- Branchville, SC: less DSL coverage, slower speeds
- Bruceton, TN: less DSL coverage, faster speeds
- Cairo Bend, TN: less DSL coverage, slower speeds
- Caney, KS: more DSL coverage, slower speeds
- Champlain, NY: more DSL coverage, slower speeds
- Chapman, KS: less DSL coverage, faster speeds
- Scio, OH: more DSL coverage, slower speeds