In Sullivans Island there are 8 residential internet providers covering 100.00% of the city. The average home can get speeds up to 5,000 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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8 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
Availability maps for all providers in Sullivans Island
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.
Please note some providers will take longer to load than others
Internet service is available in 100.00% of Sullivans Island. 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 AT&T. Now you can call companies in Sullivans Island with more confidence that they might be available.
How fast are internet speeds in Sullivans Island?
The map below shows maximum internet speeds by area in Sullivans Island.
Internet Speed Key
The average Sullivans Island home can get up to 5,000 Mbps on their internet plan. For most people, the fastest download speed in the city is 5,000 Mbps, which 100.00% of residents can get.
What type of internet should I choose in Sullivans Island?
The fastest internet for you may vary based on where in Sullivans Island you live. If speed is your main concern, fiber will be the fastest internet 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.
Internet Market Health in Sullivans Island
Internet Competition Key
The map shows how competitive the Sullivans Island 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 Sullivans Island based on what connections the average home has availabile:
- Average number of internet service providers to a home: 8.1 (very healthy)
- Average types of service (fiber, cable, DSL, etc): 4.0 (very healthy)
- Average providers with broadband (25 Mbps+) speeds: 7.9 (very healthy)
Overall, competition is very healthy.
Sullivans Island internet customers have the ability to buy internet service from 6 to 10 different providers, depending on where they live. For different types of service, Sullivans Island homes have 4 options. The type(s) of service available are fixed wireless, fiber, dsl, and cable, 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. Sullivans Island internet customers who want faster speeds have between 4 and 10 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, Sullivans Island is doing quite well.
TV & Internet 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 Fiber in Sullivans Island, SC
EarthLink fiber coverage
About 100.00%, or 2,665 people, have EarthLink fiber 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 fiber download speeds
EarthLink is one of the fastest when comparing download speeds to all other internet providers in Sullivans Island. Versus other fiber providers in the area, EarthLink fiber is one of the fastest. There are no different maximum speeds throughout Sullivans Island. The fastest plan anyone in Sullivans Island can order from EarthLink goes up to 5,000 Mbps, and all Sullivans Island customers can get this speed.
Show all download speeds
- 100.0% up to 5,000.0 Mbps
EarthLink fiber upload speeds
In Sullivans Island download speeds tend to be equal to than upload speeds for EarthLink fiber. Compared to other ISPs, EarthLink is one of the fastest where upload speeds are concerned, and one of the fastest compared to other Sullivans Island fiber providers. EarthLink offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Sullivans Island is up to 5,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 5,000.0 Mbps
AT&T Fiber in Sullivans Island, SC
AT&T fiber coverage
About 100.00%, or 2,665 people, have AT&T fiber 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 fiber download speeds
AT&T is one of the fastest when comparing download speeds to all other internet providers in Sullivans Island. Versus other fiber providers in the area, AT&T fiber is one of the fastest. There are no different maximum speeds throughout Sullivans Island. The fastest plan anyone in Sullivans Island can order from AT&T goes up to 5,000 Mbps, and all Sullivans Island customers can get this speed.
Show all download speeds
- 100.0% up to 5,000.0 Mbps
AT&T fiber upload speeds
In Sullivans Island download speeds tend to be equal to than upload speeds for AT&T fiber. Compared to other ISPs, AT&T is one of the fastest where upload speeds are concerned, and one of the fastest compared to other Sullivans Island fiber providers. AT&T offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Sullivans Island is up to 5,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 5,000.0 Mbps
XFINITY from Comcast Cable in Sullivans Island, SC
XFINITY cable coverage
About 100.00%, or 2,665 people, have XFINITY cable internet available to them in the city. The company covers the entire Sullivans Island area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in every corner of Sullivans Island.
XFINITY from Comcast cable download speeds
XFINITY is above average when comparing download speeds to all other internet providers in Sullivans Island. Versus other cable providers in the area, XFINITY cable is the fastest. There are 2 different maximum speeds throughout Sullivans Island. The fastest plan anyone in Sullivans Island can order from XFINITY goes up to 2,000 Mbps, the slowest package only goes up to 1,200 Mbps, and the city-wide average maximum speed for Sullivans Island customers is up to 1,766 Mbps.
Show all download speeds
- 70.7% up to 2,000.0 Mbps
- 29.3% up to 1,200.0 Mbps
XFINITY from Comcast cable upload speeds
In Sullivans Island download speeds tend to be faster than than upload speeds for XFINITY cable. Compared to other ISPs, XFINITY is below average where upload speeds are concerned, and the fastest compared to other Sullivans Island cable providers. XFINITY 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 Sullivans Island is up to 250 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, XFINITY customers can get speeds up to 187 Mbps.
Show all upload speeds
- 70.7% up to 250.0 Mbps
- 29.3% up to 35.0 Mbps
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
WOW! Cable in Sullivans Island, SC
WOW! cable coverage
About 28.78%, or 767 people, have WOW! cable internet available to them in the city. The company covers the north and northwest Sullivans Island area. WOW! is a large internet service provider internet service providers in the US, with internet service available in a small portion of Sullivans Island.
WOW! cable download speeds
WOW! is below average when comparing download speeds to all other internet providers in Sullivans Island. Versus other cable providers in the area, WOW! cable is the slowest. There are no different maximum speeds throughout Sullivans Island. The fastest plan anyone in Sullivans Island can order from WOW! goes up to 1,200 Mbps, and all Sullivans Island customers can get this speed.
Show all download speeds
- 100.0% up to 1,200.0 Mbps
WOW! cable upload speeds
In Sullivans Island download speeds tend to be faster than than upload speeds for WOW! cable. Compared to other ISPs, WOW! is below average where upload speeds are concerned, and the slowest compared to other Sullivans Island cable providers. WOW! offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Sullivans Island is up to 50 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 50.0 Mbps
T-Mobile Home Internet Fixed Wireless in Sullivans Island, SC
T-Mobile Home Internet fixed wireless coverage
About 99.74%, or 2,658 people, have T-Mobile Home Internet fixed wireless internet available to them in the city. The company covers the entire Sullivans Island 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 Sullivans Island.
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 Sullivans Island. Versus other fixed wireless providers in the area, T-Mobile Home Internet fixed wireless is below average. There are 2 different maximum speeds throughout Sullivans Island. The fastest plan anyone in Sullivans Island 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 Sullivans Island customers is up to 90 Mbps.
Show all download speeds
- 86.9% up to 100.0 Mbps
- 13.1% up to 25.0 Mbps
T-Mobile Home Internet fixed wireless upload speeds
In Sullivans Island 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 above average compared to other Sullivans Island 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 Sullivans Island 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 18 Mbps.
Show all upload speeds
- 86.9% up to 20.0 Mbps
- 13.1% up to 3.0 Mbps
Verizon Fixed Wireless in Sullivans Island, SC
Verizon fixed wireless coverage
About 74.67%, or 1,990 people, have Verizon fixed wireless internet available to them in the city. The company covers the entire Sullivans Island area. Verizon is one of the largest internet service providers internet service providers in the US, with internet service available in much of Sullivans Island.
Verizon fixed wireless download speeds
Verizon is below average when comparing download speeds to all other internet providers in Sullivans Island. Versus other fixed wireless providers in the area, Verizon fixed wireless is the fastest. There are no different maximum speeds throughout Sullivans Island. The fastest plan anyone in Sullivans Island can order from Verizon goes up to 300 Mbps, and all Sullivans Island customers can get this speed.
Show all download speeds
- 100.0% up to 300.0 Mbps
Verizon fixed wireless upload speeds
In Sullivans Island download speeds tend to be faster than than upload speeds for Verizon fixed wireless. Compared to other ISPs, Verizon is below average where upload speeds are concerned, and the fastest compared to other Sullivans Island fixed wireless providers. Verizon offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Sullivans Island is up to 20 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 20.0 Mbps
EarthLink Fixed Wireless in Sullivans Island, SC
EarthLink fixed wireless coverage
About 52.68%, or 1,404 people, have EarthLink fixed wireless internet available to them in the city. The company covers the north, west, central, northwest, and northeast Sullivans Island area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of Sullivans Island.
EarthLink fixed wireless download speeds
EarthLink is one of the slowest when comparing download speeds to all other internet providers in Sullivans Island. Versus other fixed wireless providers in the area, EarthLink fixed wireless is one of the slowest. There are no different maximum speeds throughout Sullivans Island. The fastest plan anyone in Sullivans Island can order from EarthLink goes up to 25 Mbps, and all Sullivans Island customers can get this speed.
Show all download speeds
- 100.0% up to 25.0 Mbps
EarthLink fixed wireless upload speeds
In Sullivans Island download speeds tend to be faster than than upload speeds for EarthLink fixed wireless. Compared to other ISPs, EarthLink is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Sullivans Island fixed wireless providers. EarthLink offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Sullivans Island is up to 3.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 3.0 Mbps
AT&T Fixed Wireless in Sullivans Island, SC
AT&T fixed wireless coverage
About 52.68%, or 1,404 people, have AT&T fixed wireless internet available to them in the city. The company covers the north, west, central, northwest, and northeast Sullivans Island 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 Sullivans Island.
AT&T fixed wireless download speeds
AT&T is one of the slowest when comparing download speeds to all other internet providers in Sullivans Island. Versus other fixed wireless providers in the area, AT&T fixed wireless is one of the slowest. There are no different maximum speeds throughout Sullivans Island. The fastest plan anyone in Sullivans Island can order from AT&T goes up to 25 Mbps, and all Sullivans Island customers can get this speed.
Show all download speeds
- 100.0% up to 25.0 Mbps
AT&T fixed wireless upload speeds
In Sullivans Island download speeds tend to be faster than than upload speeds for AT&T fixed wireless. Compared to other ISPs, AT&T is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Sullivans Island fixed wireless providers. AT&T offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Sullivans Island is up to 3.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 3.0 Mbps
Sullivans Island Internet 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 internet in Sullivans Island compare to the rest of South Carolina?
Internet speeds in Sullivans Island are much faster versus the average speeds in South Carolina: 3,075 Mbps in South Carolina versus 5,000 Mbps in the city. The state has similar internet availability compared to the city. Average internet coverage in South Carolina is 98.34% versus 100.00% in Sullivans Island.
What zip codes have widespread internet?
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 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
- Isle Of Palms, SC: equal internet coverage, slower speeds
- Mount Pleasant, SC: less internet coverage, slower speeds
- Charleston, SC: less internet coverage, slower speeds
- Folly Beach, SC: less internet coverage, slower speeds
- Johns Island, SC: less internet coverage, slower speeds
- Charleston Afb, SC: less internet coverage, slower speeds
- Fenwick Hills, SC: equal internet coverage, similar speeds
- Legareville, SC: equal internet coverage, slower speeds
- Red Top, SC: equal internet coverage, slower speeds
- Kiawah Island, SC: less internet coverage, slower speeds
Cities with Similar Populations
- Baird, TX: less internet coverage, slower speeds
- Lesage, WV: less internet coverage, slower speeds
- Star Valley, AZ: less internet coverage, slower speeds
- Frederic, WI: less internet coverage, slower speeds
- Empire, CA: less internet coverage, slower speeds
- East Uniontown, PA: equal internet coverage, faster speeds
- Duquesne, MO: equal internet coverage, slower speeds
- Creola, AL: less internet coverage, slower speeds
- Carlisle, AR: less internet coverage, slower speeds
- Belle Plaine, IA: equal internet coverage, slower speeds