In the Charleston area there are 3 residential DSL providers covering 64.88% 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 Charleston, SC.
To see availability maps for all providers including fiber, cable, DSL, and more in Charleston, SC please click below.
Charleston, SC Availability Maps
DSL Internet Service Providers in Charleston
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 the Charleston area are not shown.
Charleston 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 the Charleston area is DSL internet available?
DSL Internet Availability Key
DSL is available in 64.88% of the Charleston area. 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 the Charleston area above to see who has service at your home.
How fast is DSL internet in the Charleston area?
The map below shows maximum DSL internet speeds by area in the Charleston area.
DSL Internet Speed Key
The average Charleston home can get up to 68 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 115 Mbps, which less than 1% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 11.50% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in the Charleston area.
DSL internet speeds tend to be faster in the north parts of the Charleston area, and slower in the northeast areas of the city.
Is DSL the fastest internet I can get in the Charleston area?
The fastest internet for you may vary based on where in the Charleston area you live. In general, fiber competes most often with DSL in the city.
- Fiber is the fastest internet type for 60.73% of Charleston homes.
- Cable is fastest for 37.25% 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 1.66% of Charleston homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in the Charleston area, along with details on where in the Charleston area and at what speeds.
AT&T DSL in Charleston, SC
AT&T DSL coverage
About 62.03%, or 495,979 people, have AT&T DSL internet available to them in the city. The company covers the entire Charleston area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of the Charleston area.
AT&T DSL download speeds
AT&T is below average when comparing download speeds to all other internet providers in the Charleston area. Versus other DSL providers in the area, AT&T DSL is one of the fastest. There are 5 different maximum speeds throughout the Charleston area. The fastest plan anyone in the Charleston area 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 Charleston customers is up to 69 Mbps.
Show all download speeds
- 50.3% up to 100.0 Mbps
- 9.7% up to 75.0 Mbps
- 16.1% up to 50.0 Mbps
- 6.8% up to 25.0 Mbps
- 17.0% up to 10.0 Mbps
AT&T DSL upload speeds
In the Charleston area 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 Charleston 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 the Charleston area 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
- 60.0% up to 20.0 Mbps
- 16.1% up to 10.0 Mbps
- 6.8% up to 5.0 Mbps
- 17.0% up to 1.0 Mbps
EarthLink DSL in Charleston, SC
EarthLink DSL coverage
About 62.03%, or 495,979 people, have EarthLink DSL internet available to them in the city. The company covers the entire Charleston area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of the Charleston area.
EarthLink DSL download speeds
EarthLink is below average when comparing download speeds to all other internet providers in the Charleston area. Versus other DSL providers in the area, EarthLink DSL is one of the fastest. There are 5 different maximum speeds throughout the Charleston area. The fastest plan anyone in the Charleston area 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 Charleston customers is up to 69 Mbps.
Show all download speeds
- 50.3% up to 100.0 Mbps
- 9.7% up to 75.0 Mbps
- 16.1% up to 50.0 Mbps
- 6.8% up to 25.0 Mbps
- 17.0% up to 10.0 Mbps
EarthLink DSL upload speeds
In the Charleston area 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 Charleston 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 the Charleston area 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
- 60.0% up to 20.0 Mbps
- 16.1% up to 10.0 Mbps
- 6.8% up to 5.0 Mbps
- 17.0% up to 1.0 Mbps
Charleston DSL by Area
This information is most helpful to those looking for homes or considering moving to the Charleston area or any of the areas nearby.
How does DSL internet in the Charleston area compare to the rest of South Carolina?
DSL internet speeds in the Charleston area 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 64.88% in the Charleston area.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around the Charleston area 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
- Johns Island, SC: more DSL coverage, faster speeds
- Fenwick Hills, SC: more DSL coverage, faster speeds
- Charleston Afb, SC: less DSL coverage, slower speeds
- Sullivans Island, SC: more DSL coverage, faster speeds
- Red Top, SC: less DSL coverage, slower speeds
- Folly Beach, SC: more DSL coverage, slower speeds
- Mount Pleasant, SC: more DSL coverage, faster speeds
- Legareville, SC: more DSL coverage, slower speeds
- Isle Of Palms, SC: more DSL coverage, faster speeds
- Ravenel, SC: less DSL coverage, slower speeds
Cities with Similar Populations
- Dayton, OH: more DSL coverage, slower speeds
- Stockton, CA: more DSL coverage, faster speeds
- Greensboro, NC: less DSL coverage, slower speeds
- Columbia, SC: more DSL coverage, faster speeds
- Sarasota, FL: less DSL coverage, slower speeds
- Boise, ID: more DSL coverage, faster speeds
- Fort Myers, FL: more DSL coverage, slower speeds
- Oxnard, CA: less DSL coverage, slower speeds
- Colorado Springs, CO: more DSL coverage, faster speeds
- Baton Rouge, LA: more DSL coverage, slower speeds