In Dupo there are 4 residential DSL providers covering 99.28% of the city. The average home can get speeds up to 85 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 Dupo, IL.
To see availability maps for all providers including fiber, cable, DSL, and more in Dupo, IL please click below.
DSL Internet Service Providers in Dupo
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 Dupo are not shown.
Dupo 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 Dupo is DSL internet available?
DSL Internet Availability Key
DSL is available in 99.28% of Dupo. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is HTC. Call one of the companies with service in Dupo above to see who has service at your home.
How fast is DSL internet in Dupo?
The map below shows maximum DSL internet speeds by area in Dupo.
DSL Internet Speed Key
The average Dupo home can get up to 85 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 100 Mbps, which 74.61% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 4.85% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Dupo.
DSL internet speeds tend to be faster in the east parts of Dupo, and slower in the northeast areas of the city.
Is DSL the fastest internet I can get in Dupo?
The fastest internet for you may vary based on where in Dupo you live. In general, cable competes most often with DSL in the city.
- Fiber is the fastest internet type for 31.33% of Dupo homes.
- Cable is fastest for 65.54% of the city.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 2.30%.
- Satellite internet may be the only option for less than 1% of Dupo homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Dupo, along with details on where in Dupo and at what speeds.
Harrisonville Telephone Company DSL in Dupo, IL
HTC DSL coverage
About 95.80%, or 4,407 people, have HTC DSL internet available to them in the city. The company covers the entire Dupo area. HTC is a large internet service provider internet service providers in the US, with internet service available in most of Dupo.
Harrisonville Telephone Company DSL download speeds
HTC is below average when comparing download speeds to all other internet providers in Dupo. Versus other DSL providers in the area, HTC DSL is the fastest. There are 4 different maximum speeds throughout Dupo. The fastest plan anyone in Dupo can order from HTC goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Dupo customers is up to 88 Mbps.
Show all download speeds
- 77.9% up to 100.0 Mbps
- 17.0% up to 50.0 Mbps
- 3.7% up to 30.0 Mbps
- 1.4% up to 10.0 Mbps
Harrisonville Telephone Company DSL upload speeds
In Dupo download speeds tend to be faster than than upload speeds for HTC DSL. Compared to other ISPs, HTC is below average where upload speeds are concerned, and the fastest compared to other Dupo DSL providers. HTC 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 Dupo is up to 20 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, HTC customers can get speeds up to 17 Mbps.
Show all upload speeds
- 77.9% up to 20.0 Mbps
- 17.0% up to 10.0 Mbps
- 3.7% up to 3.0 Mbps
- 1.4% up to 1.0 Mbps
EarthLink DSL in Dupo, IL
EarthLink DSL coverage
About 3.48%, or 160 people, have EarthLink DSL internet available to them in the city. The company covers the northeast Dupo 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 Dupo.
EarthLink DSL download speeds
EarthLink is one of the slowest when comparing download speeds to all other internet providers in Dupo. Versus other DSL providers in the area, EarthLink DSL is one of the slowest. There are no different maximum speeds throughout Dupo. The fastest plan anyone in Dupo can order from EarthLink goes up to 10 Mbps, and all Dupo customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
EarthLink DSL upload speeds
In Dupo 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 Dupo DSL providers. EarthLink offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Dupo is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
AT&T DSL in Dupo, IL
AT&T DSL coverage
About 3.48%, or 160 people, have AT&T DSL internet available to them in the city. The company covers the northeast Dupo 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 Dupo.
AT&T DSL download speeds
AT&T is one of the slowest when comparing download speeds to all other internet providers in Dupo. Versus other DSL providers in the area, AT&T DSL is one of the slowest. There are no different maximum speeds throughout Dupo. The fastest plan anyone in Dupo can order from AT&T goes up to 10 Mbps, and all Dupo customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
AT&T DSL upload speeds
In Dupo 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 Dupo DSL providers. AT&T offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Dupo is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
Frontier Communications DSL in Dupo, IL
Frontier DSL coverage
About 1.37%, or 63 people, have Frontier DSL internet available to them in the city. The company covers the northeast Dupo area. Frontier is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Dupo.
Frontier Communications DSL download speeds
Frontier is one of the slowest when comparing download speeds to all other internet providers in Dupo. Versus other DSL providers in the area, Frontier DSL is one of the slowest. There are no different maximum speeds throughout Dupo. The fastest plan anyone in Dupo can order from Frontier goes up to 10 Mbps, and all Dupo customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
Frontier Communications DSL upload speeds
In Dupo download speeds tend to be faster than than upload speeds for Frontier DSL. Compared to other ISPs, Frontier is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Dupo DSL providers. Frontier offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Dupo is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
Dupo DSL by Area
This information is most helpful to those looking for homes or considering moving to Dupo or any of the areas nearby.
How does DSL internet in Dupo compare to the rest of Illinois?
DSL internet speeds in Dupo are much faster versus the average speeds in Illinois: 0.00 Mbps in Illinois versus 85 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in Illinois is 0.00% versus 99.28% in Dupo.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Dupo 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
- East Carondelet, IL: less DSL coverage, faster speeds
- Cahokia, IL: less DSL coverage, slower speeds
- Phelps, IL: more DSL coverage, slower speeds
- Sauget, IL: less DSL coverage, slower speeds
- Lemay, MO: less DSL coverage, slower speeds
- Bella Villa, MO: less DSL coverage, slower speeds
- Columbia, IL: more DSL coverage, faster speeds
- Wilbur Park, MO: less DSL coverage, faster speeds
- St. George, MO: less DSL coverage, slower speeds
- Alorton, IL: less DSL coverage, slower speeds
Cities with Similar Populations
- New Ipswich, NH: less DSL coverage, slower speeds
- Athens, PA: less DSL coverage, slower speeds
- Morrison, TN: less DSL coverage, slower speeds
- Ashland, PA: less DSL coverage, slower speeds
- Cassville, MO: less DSL coverage, slower speeds
- Lewisburg, WV: less DSL coverage, slower speeds
- Ashford, AL: less DSL coverage, slower speeds
- New Hampton, IA: less DSL coverage, faster speeds
- Olivet, MI: less DSL coverage, slower speeds
- Barrington Hills, IL: less DSL coverage, slower speeds