In Boulder County there is 1 residential DSL provider covering 89.20% of the county. The average home can get speeds up to 90 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 Boulder County, CO.
To see availability maps for all providers including fiber, cable, DSL, and more in Boulder County, CO please click below.
Boulder County, CO Availability Maps
DSL Internet Service Provider in Boulder 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 Boulder County are not shown.
Boulder 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 Boulder County is DSL internet available?
DSL Internet Availability Key
DSL is available in 89.20% of Boulder County. 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 Boulder County above to see who has service at your home.
How fast is DSL internet in Boulder County?
The map below shows maximum DSL internet speeds by area in Boulder County.
DSL Internet Speed Key
The average Boulder County home can get up to 90 Mbps on their DSL internet plan. The fastest DSL download speed in the county is 140 Mbps, which 26.71% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 13.05% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Boulder County.
DSL internet speeds tend to be faster in the north parts of Boulder County, and slower in the east areas of the county.
Is DSL the fastest internet I can get in Boulder County?
The fastest internet for you may vary based on where in Boulder County you live. In general, fiber competes most often with DSL in the county.
- Fiber is the fastest internet type for 49.67% of Boulder County homes.
- Cable is fastest for 44.75% of the county.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 2.93%.
- Satellite internet may be the only option for 2.36% of Boulder County homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Boulder County, along with details on where in Boulder County and at what speeds.
Centurylink DSL in Boulder County, CO
Centurylink DSL coverage
About 89.20%, or 295,046 people, have Centurylink DSL internet available to them in the county. The company covers the entire Boulder County area. Centurylink is one of the largest internet service providers internet service providers in the US, with internet service available in most of Boulder County.
Centurylink DSL download speeds
Centurylink is below average when comparing download speeds to all other internet providers in Boulder County. Versus other DSL providers in the area, Centurylink DSL is the fastest. There are 7 different maximum speeds throughout Boulder County. The fastest plan anyone in Boulder County can order from Centurylink goes up to 140 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Boulder County customers is up to 90 Mbps.
Show all download speeds
- 29.9% up to 140.0 Mbps
- 0.4% up to 120.0 Mbps
- 31.6% up to 100.0 Mbps
- 10.8% up to 80.0 Mbps
- 5.4% up to 60.0 Mbps
- 7.2% up to 40.0 Mbps
- 14.6% up to 10.0 Mbps
Centurylink DSL upload speeds
In Boulder County download speeds tend to be faster than than upload speeds for Centurylink DSL. Compared to other ISPs, Centurylink is below average where upload speeds are concerned, and the fastest compared to other Boulder County DSL providers. Centurylink offers 7 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 Boulder County is up to 100 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Centurylink customers can get speeds up to 12 Mbps.
Show all upload speeds
- 0.1% up to 100.0 Mbps
- 2.1% up to 40.0 Mbps
- 29.9% up to 20.0 Mbps
- 40.9% up to 10.0 Mbps
- 5.5% up to 5.0 Mbps
- 6.8% up to 3.0 Mbps
- 14.6% up to 1.0 Mbps
Boulder County DSL by Area
This information is most helpful to those looking for homes or considering moving to Boulder County or any of the areas nearby.
How does DSL internet in Boulder County compare to the rest of Colorado?
DSL internet speeds in Boulder County are much faster versus the average speeds in Colorado: 0.00 Mbps in Colorado versus 90 Mbps in the county. The state has similar DSL availability compared to the county. Average DSL coverage in Colorado is 0.00% versus 89.20% in Boulder County.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Boulder 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
- Broomfield County, CO: less DSL coverage, slower speeds
- Grand County, CO: more DSL coverage, slower speeds
- Washington County, CO: less DSL coverage, slower speeds
- Yuma County, CO: less DSL coverage, slower speeds
- Rio Blanco County, CO: less DSL coverage, slower speeds
- Harlan County, NE: less DSL coverage, slower speeds
- Franklin County, NE: less DSL coverage, slower speeds
- Webster County, NE: less DSL coverage, faster speeds
- Nuckolls County, NE: less DSL coverage, slower speeds
- Thayer County, NE: less DSL coverage, faster speeds
Counties with Similar Populations
- Anoka County, MN: more DSL coverage, faster speeds
- Clackamas County, OR: less DSL coverage, slower speeds
- Bell County, TX: less DSL coverage, slower speeds
- Placer County, CA: less DSL coverage, faster speeds
- Pinal County, AZ: less DSL coverage, slower speeds
- Charleston County, SC: less DSL coverage, slower speeds
- Cameron County, TX: less DSL coverage, slower speeds
- Cumberland County, PA: less DSL coverage, slower speeds
- Rockingham County, NH: less DSL coverage, slower speeds
- Davis County, UT: more DSL coverage, slower speeds