In Sullivan County there are 2 residential DSL providers covering 73.55% of the county. The average home can get speeds up to 26 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, NH.
To see availability maps for all providers including fiber, cable, DSL, and more in Sullivan County, NH please click below.
Sullivan County, NH 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 73.55% of Sullivan County. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is Fidium. 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 26 Mbps on their DSL internet plan. The fastest DSL download speed in the county is 100 Mbps, which 6.18% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 54.41% 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 central 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, fiber competes most often with DSL in the county.
- Fiber is the fastest internet type for 57.99% of Sullivan County homes.
- Cable is fastest for 40.86% of the county.
- 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 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.
Fidium Fiber DSL in Sullivan County, NH
Fidium DSL coverage
About 71.14%, or 30,636 people, have Fidium DSL internet available to them in the county. The company covers the entire Sullivan County area. Fidium is one of the largest internet service providers internet service providers in the US, with internet service available in much of Sullivan County.
Fidium Fiber DSL download speeds
Fidium is below average when comparing download speeds to all other internet providers in Sullivan County. Versus other DSL providers in the area, Fidium DSL is average. There are 5 different maximum speeds throughout Sullivan County. The fastest plan anyone in Sullivan County can order from Fidium goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Sullivan County customers is up to 24 Mbps.
Show all download speeds
- 6.4% up to 100.0 Mbps
- 3.3% up to 80.0 Mbps
- 7.6% up to 60.0 Mbps
- 5.8% up to 40.0 Mbps
- 76.9% up to 10.0 Mbps
Fidium Fiber DSL upload speeds
In Sullivan County download speeds tend to be faster than than upload speeds for Fidium DSL. Compared to other ISPs, Fidium is below average where upload speeds are concerned, and average compared to other Sullivan County DSL providers. Fidium 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 40 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Fidium customers can get speeds up to 6.0 Mbps.
Show all upload speeds
- 6.4% up to 40.0 Mbps
- 10.1% up to 20.0 Mbps
- 6.6% up to 10.0 Mbps
- 76.9% up to 1.0 Mbps
TDS DSL in Sullivan County, NH
TDS DSL coverage
About 3.06%, or 1,316 people, have TDS DSL internet available to them in the county. The company covers the north and northeast Sullivan County area. TDS is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Sullivan County.
TDS DSL download speeds
TDS is below average when comparing download speeds to all other internet providers in Sullivan County. Versus other DSL providers in the area, TDS DSL is the fastest. There are 4 different maximum speeds throughout Sullivan County. The fastest plan anyone in Sullivan County can order from TDS goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Sullivan County customers is up to 67 Mbps.
Show all download speeds
- 52.4% up to 100.0 Mbps
- 17.5% up to 50.0 Mbps
- 18.6% up to 25.0 Mbps
- 11.6% up to 10.0 Mbps
TDS DSL upload speeds
In Sullivan County download speeds tend to be faster than than upload speeds for TDS DSL. Compared to other ISPs, TDS is below average where upload speeds are concerned, and the fastest compared to other Sullivan County DSL providers. TDS offers 5 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 20 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, TDS customers can get speeds up to 12 Mbps.
Show all upload speeds
- 35.9% up to 20.0 Mbps
- 16.5% up to 15.0 Mbps
- 17.5% up to 10.0 Mbps
- 18.6% up to 5.0 Mbps
- 11.6% 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 New Hampshire?
DSL internet speeds in Sullivan County are much faster versus the average speeds in New Hampshire: 0.00 Mbps in New Hampshire versus 26 Mbps in the county. The state has similar DSL availability compared to the county. Average DSL coverage in New Hampshire is 0.00% versus 73.55% 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
- Merrimack County, NH: less DSL coverage, faster speeds
- Washington County, NY: less DSL coverage, slower speeds
- Strafford County, NH: more DSL coverage, slower speeds
- Warren County, NY: less DSL coverage, faster speeds
- York County, ME: more DSL coverage, slower speeds
- Oswego County, NY: less DSL coverage, faster speeds
- Orleans County, NY: less DSL coverage, slower speeds
- Sanilac County, MI: less DSL coverage, faster speeds
- Tuscola County, MI: less DSL coverage, faster speeds
- Saginaw County, MI: less DSL coverage, faster speeds
Counties with Similar Populations
- Campbell County, WY: more DSL coverage, faster speeds
- Tioga County, PA: less DSL coverage, slower speeds
- Chambers County, TX: less DSL coverage, faster speeds
- Cayey Municipio, PR: more DSL coverage, slower speeds
- Cass County, MI: less DSL coverage, slower speeds
- Cass County, IN: less DSL coverage, faster speeds
- Carter County, OK: more DSL coverage, slower speeds
- Carroll County, NH: less DSL coverage, slower speeds
- Carlton County, MN: more DSL coverage, faster speeds
- Canovanas Municipio, PR: more DSL coverage, faster speeds