In Sullivan County there are 4 residential DSL providers covering 73.17% of the county. The average home can get speeds up to 34 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 Sullivan County, IN.
To see availability maps for all providers including fiber, cable, DSL, and more in Sullivan County, IN please click below.
Sullivan County, IN Availability Maps
DSL Internet Service Providers in Sullivan County
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 Sullivan County are not shown.
Sullivan County 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 Sullivan County is DSL internet available?
DSL Internet Availability Key
DSL is available in 73.17% of Sullivan County. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is Frontier. Call one of the companies with service in Sullivan County above to see who has service at your home.
How fast is DSL internet in Sullivan County?
The map below shows maximum DSL internet speeds by area in Sullivan County.
DSL Internet Speed Key
The average Sullivan County home can get up to 34 Mbps on their DSL internet plan. The fastest DSL download speed in the county is 115 Mbps, which 6.16% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 44.74% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Sullivan County.
DSL internet speeds tend to be faster in the northwest parts of Sullivan County, and slower in the southeast areas of the county.
Is DSL the fastest internet I can get in Sullivan County?
The fastest internet for you may vary based on where in Sullivan County you live. In general, cable competes most often with DSL in the county.
- Fiber is the fastest internet type for 27.02% of Sullivan County homes.
- Cable is fastest for 35.72% of the county.
- DSL is fastest for 4.28%.
- Fixed wireless is fastest for 31.90%.
- Satellite internet may be the only option for 1.09% of Sullivan County homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Sullivan County, along with details on where in Sullivan County and at what speeds.
Frontier Communications DSL in Sullivan County, IN
Frontier DSL coverage
About 61.80%, or 12,864 people, have Frontier DSL internet available to them in the county. The company covers the entire Sullivan County area. Frontier is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of Sullivan County.
Frontier Communications DSL download speeds
Frontier is below average when comparing download speeds to all other internet providers in Sullivan County. Versus other DSL providers in the area, Frontier DSL is the fastest. There are 5 different maximum speeds throughout Sullivan County. The fastest plan anyone in Sullivan County can order from Frontier goes up to 115 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Sullivan County customers is up to 37 Mbps.
Show all download speeds
- 10.0% up to 115.0 Mbps
- 8.5% up to 90.0 Mbps
- 9.7% up to 70.0 Mbps
- 12.1% up to 45.0 Mbps
- 59.8% up to 10.0 Mbps
Frontier Communications DSL upload speeds
In Sullivan County download speeds tend to be faster than than upload speeds for Frontier DSL. Compared to other ISPs, Frontier is below average where upload speeds are concerned, and the fastest compared to other Sullivan County DSL providers. Frontier offers 4 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Sullivan County is up to 7.0 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Frontier customers can get speeds up to 2.4 Mbps.
Show all upload speeds
- 10.0% up to 7.0 Mbps
- 8.5% up to 5.0 Mbps
- 21.8% up to 3.0 Mbps
- 59.8% up to 1.0 Mbps
Smithville DSL in Sullivan County, IN
Smithville DSL coverage
About 6.50%, or 1,353 people, have Smithville DSL internet available to them in the county. The company covers the northeast, southeast, and east Sullivan County area. Smithville is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Sullivan County.
Smithville DSL download speeds
Smithville is below average when comparing download speeds to all other internet providers in Sullivan County. Versus other DSL providers in the area, Smithville DSL is average. There are 2 different maximum speeds throughout Sullivan County. The fastest plan anyone in Sullivan County can order from Smithville goes up to 25 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Sullivan County customers is up to 18 Mbps.
Show all download speeds
- 55.0% up to 25.0 Mbps
- 45.0% up to 10.0 Mbps
Smithville DSL upload speeds
In Sullivan County download speeds tend to be faster than than upload speeds for Smithville DSL. Compared to other ISPs, Smithville is below average where upload speeds are concerned, and average compared to other Sullivan County DSL providers. Smithville offers 2 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Sullivan County is up to 3.0 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Smithville customers can get speeds up to 2.1 Mbps.
Show all upload speeds
- 55.0% up to 3.0 Mbps
- 45.0% up to 1.0 Mbps
AT&T DSL in Sullivan County, IN
AT&T DSL coverage
About 5.30%, or 1,103 people, have AT&T DSL internet available to them in the county. The company covers the east and southeast Sullivan County area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Sullivan County.
AT&T DSL download speeds
AT&T is one of the slowest when comparing download speeds to all other internet providers in Sullivan County. Versus other DSL providers in the area, AT&T DSL is one of the slowest. There are no different maximum speeds throughout Sullivan County. The fastest plan anyone in Sullivan County can order from AT&T goes up to 10 Mbps, and all Sullivan County customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
AT&T DSL upload speeds
In Sullivan County download speeds tend to be faster than than upload speeds for AT&T DSL. Compared to other ISPs, AT&T is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Sullivan County DSL providers. AT&T offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Sullivan County is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
EarthLink DSL in Sullivan County, IN
EarthLink DSL coverage
About 5.30%, or 1,103 people, have EarthLink DSL internet available to them in the county. The company covers the east and southeast Sullivan County area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Sullivan County.
EarthLink DSL download speeds
EarthLink is one of the slowest when comparing download speeds to all other internet providers in Sullivan County. Versus other DSL providers in the area, EarthLink DSL is one of the slowest. There are no different maximum speeds throughout Sullivan County. The fastest plan anyone in Sullivan County can order from EarthLink goes up to 10 Mbps, and all Sullivan County customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
EarthLink DSL upload speeds
In Sullivan County download speeds tend to be faster than than upload speeds for EarthLink DSL. Compared to other ISPs, EarthLink is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Sullivan County DSL providers. EarthLink offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Sullivan County is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
Sullivan County DSL by Area
This information is most helpful to those looking for homes or considering moving to Sullivan County or any of the areas nearby.
How does DSL internet in Sullivan County compare to the rest of Indiana?
DSL internet speeds in Sullivan County are much faster versus the average speeds in Indiana: 0.00 Mbps in Indiana versus 34 Mbps in the county. The state has similar DSL availability compared to the county. Average DSL coverage in Indiana is 0.00% versus 73.17% in Sullivan County.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Sullivan County 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 counties?
Below are counties nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Counties
- Crawford County, IL: less DSL coverage, faster speeds
- Greene County, IN: more DSL coverage, slower speeds
- Jasper County, IL: less DSL coverage, faster speeds
- Monroe County, IN: less DSL coverage, faster speeds
- Cumberland County, IL: more DSL coverage, faster speeds
- Effingham County, IL: more DSL coverage, faster speeds
- Brown County, IN: less DSL coverage, slower speeds
- Bartholomew County, IN: more DSL coverage, faster speeds
- Jennings County, IN: less DSL coverage, slower speeds
- Montgomery County, IL: more DSL coverage, faster speeds
Counties with Similar Populations
- Chattooga County, GA: more DSL coverage, faster speeds
- Caddo County, OK: more DSL coverage, slower speeds
- Caldwell County, KY: less DSL coverage, slower speeds
- Caledonia County, VT: more DSL coverage, faster speeds
- Calhoun County, FL: more DSL coverage, slower speeds
- Carroll County, IN: less DSL coverage, slower speeds
- Carroll County, TN: less DSL coverage, slower speeds
- Cass County, MN: less DSL coverage, faster speeds
- Cass County, TX: less DSL coverage, faster speeds
- Catano Municipio, PR: more DSL coverage, slower speeds