In Calmar there are 2 residential DSL providers covering 89.12% of the city. The average home can get speeds up to 10 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 Calmar, IA.
To see availability maps for all providers including fiber, cable, DSL, and more in Calmar, IA please click below.
DSL Internet Service Providers in Calmar
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 Calmar are not shown.
Calmar 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 Calmar is DSL internet available?
DSL Internet Availability Key
DSL is available in 89.12% of Calmar. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is Centurylink. Call one of the companies with service in Calmar above to see who has service at your home.
How fast is DSL internet in Calmar?
The map below shows maximum DSL internet speeds by area in Calmar.
DSL Internet Speed Key
The average Calmar home can get up to 10 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 100 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, 87.22% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Calmar.
DSL internet speeds tend to be faster in the northwest parts of Calmar, and slower in the south areas of the city.
Is DSL the fastest internet I can get in Calmar?
The fastest internet for you may vary based on where in Calmar you live. In general, fiber competes most often with DSL in the city.
- Fiber is the fastest internet type for 94.07% of Calmar homes.
- Cable is fastest for less than 1% of the city.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 4.87%.
- Satellite internet may be the only option for less than 1% of Calmar homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Calmar, along with details on where in Calmar and at what speeds.
Centurylink DSL in Calmar, IA
Centurylink DSL coverage
About 86.65%, or 1,227 people, have Centurylink DSL internet available to them in the city. The company covers the entire Calmar area. Centurylink is one of the largest internet service providers internet service providers in the US, with internet service available in most of Calmar.
Centurylink DSL download speeds
Centurylink is one of the slowest when comparing download speeds to all other internet providers in Calmar. Versus other DSL providers in the area, Centurylink DSL is the slowest. There are no different maximum speeds throughout Calmar. The fastest plan anyone in Calmar can order from Centurylink goes up to 10 Mbps, and all Calmar customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
Centurylink DSL upload speeds
In Calmar download speeds tend to be faster than than upload speeds for Centurylink DSL. Compared to other ISPs, Centurylink is one of the slowest where upload speeds are concerned, and the slowest compared to other Calmar DSL providers. Centurylink offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Calmar is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
Windstream DSL in Calmar, IA
Windstream DSL coverage
About 2.47%, or 35 people, have Windstream DSL internet available to them in the city. The company covers the northwest Calmar area. Windstream is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Calmar.
Windstream DSL download speeds
Windstream is below average when comparing download speeds to all other internet providers in Calmar. Versus other DSL providers in the area, Windstream DSL is the fastest. There are 3 different maximum speeds throughout Calmar. The fastest plan anyone in Calmar can order from Windstream goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Calmar customers is up to 28 Mbps.
Show all download speeds
- 8.6% up to 100.0 Mbps
- 68.6% up to 25.0 Mbps
- 22.9% up to 10.0 Mbps
Windstream DSL upload speeds
In Calmar download speeds tend to be faster than than upload speeds for Windstream DSL. Compared to other ISPs, Windstream is below average where upload speeds are concerned, and the fastest compared to other Calmar DSL providers. Windstream offers 3 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 Calmar is up to 23 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Windstream customers can get speeds up to 4.3 Mbps.
Show all upload speeds
- 8.6% up to 23.0 Mbps
- 68.6% up to 3.0 Mbps
- 22.9% up to 1.0 Mbps
Calmar DSL by Area
This information is most helpful to those looking for homes or considering moving to Calmar or any of the areas nearby.
How does DSL internet in Calmar compare to the rest of Iowa?
DSL internet speeds in Calmar are much faster versus the average speeds in Iowa: 0.00 Mbps in Iowa versus 10 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in Iowa is 0.00% versus 89.12% in Calmar.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Calmar 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
- Conover, IA: less DSL coverage, faster speeds
- Spillville, IA: less DSL coverage, slower speeds
- Fort Atkinson, IA: less DSL coverage, faster speeds
- Nordness, IA: less DSL coverage, faster speeds
- St. Lucas, IA: less DSL coverage, faster speeds
- Jackson Junction, IA: less DSL coverage, slower speeds
- Decorah, IA: less DSL coverage, faster speeds
- Ridgeway, IA: less DSL coverage, slower speeds
- Protivin, IA: less DSL coverage, faster speeds
- Freeport, IA: less DSL coverage, faster speeds
Cities with Similar Populations
- Wyalusing, PA: more DSL coverage, faster speeds
- Wolf Creek, OR: more DSL coverage, faster speeds
- West Helena, AR: less DSL coverage, slower speeds
- Waterloo, AL: less DSL coverage, faster speeds
- Warrensburg, IL: less DSL coverage, faster speeds
- Waelder, TX: less DSL coverage, slower speeds
- Vienna, MO: less DSL coverage, slower speeds
- Tremont City, OH: less DSL coverage, faster speeds
- Sun, MI: less DSL coverage, slower speeds
- Brook, IN: more DSL coverage, faster speeds