In 81521 there are 2 residential Fiber providers covering 94.07% of the zip. The average home can get speeds up to 1,006 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 Fiber internet providers in 81521, CO.
To see availability maps for all providers including fiber, cable, DSL, and more in 81521, CO please click below.
Fiber Internet Service Providers in 81521
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 81521 are not shown.
81521 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 81521 is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 94.07% of 81521. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is Clearnetworx. Call one of the companies with service in 81521 above to see who has service at your home.
How fast is fiber internet in 81521?
The map below shows maximum fiber internet speeds by area in 81521.
Fiber Internet Speed Key
The average 81521 home can get up to 1,006 Mbps on their fiber internet plan. The fastest fiber download speed in the zip is 3,000 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, 93.78% of homes can only purchase plans up to 1,000 Mbps. See the internet provider details below for info about their speed and coverage in 81521.
Fiber internet speeds tend to be faster in the southeast parts of 81521, and slower in the east areas of the zip.
Is fiber the fastest internet I can get in 81521?
The fastest internet for you may vary based on where in 81521 you live. In general, fixed wireless competes most often with fiber in the zip.
- Fiber is the fastest internet type for 94.07% of 81521 homes.
- Cable is fastest for 1.97% of the zip.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 3.73%.
- Satellite internet may be the only option for less than 1% of 81521 homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in 81521, along with details on where in 81521 and at what speeds.
Clearnetworx Fiber in 81521, CO
Clearnetworx fiber coverage
About 82.16%, or 13,532 people, have Clearnetworx fiber internet available to them in the zip. The company covers the entire 81521 area. Clearnetworx is a large internet service provider internet service providers in the US, with internet service available in much of 81521.
Clearnetworx fiber download speeds
Clearnetworx is above average when comparing download speeds to all other internet providers in 81521. Versus other fiber providers in the area, Clearnetworx fiber is one of the slowest. There are no different maximum speeds throughout 81521. The fastest plan anyone in 81521 can order from Clearnetworx goes up to 1,000 Mbps, and all 81521 customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Clearnetworx fiber upload speeds
In 81521 download speeds tend to be equal to than upload speeds for Clearnetworx fiber. Compared to other ISPs, Clearnetworx is above average where upload speeds are concerned, and below average compared to other 81521 fiber providers. Clearnetworx offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 81521 is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
Spectrum Fiber in 81521, CO
Spectrum fiber coverage
About 14.67%, or 2,417 people, have Spectrum fiber internet available to them in the zip. The company covers the northeast, southeast, north, east, and northwest 81521 area. Spectrum is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of 81521.
Spectrum fiber download speeds
Spectrum is above average when comparing download speeds to all other internet providers in 81521. Versus other fiber providers in the area, Spectrum fiber is one of the slowest. There are no different maximum speeds throughout 81521. The fastest plan anyone in 81521 can order from Spectrum goes up to 1,000 Mbps, and all 81521 customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Spectrum fiber upload speeds
In 81521 download speeds tend to be faster than than upload speeds for Spectrum fiber. Compared to other ISPs, Spectrum is above average where upload speeds are concerned, and the slowest compared to other 81521 fiber providers. Spectrum offers 2 different upload speeds across the zip, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in 81521 is up to 500 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, Spectrum customers can get speeds up to 473 Mbps.
Show all upload speeds
- 94.1% up to 500.0 Mbps
- 5.9% up to 35.0 Mbps
81521 Fiber by Area
This information is most helpful to those looking for homes or considering moving to 81521 or any of the areas nearby.
How does fiber internet in 81521 compare to the rest of Colorado?
Fiber internet speeds in 81521 are much faster versus the average speeds in Colorado: 0.00 Mbps in Colorado versus 1,006 Mbps in the zip. The state has similar fiber availability compared to the zip. Average fiber coverage in Colorado is 0.00% versus 94.07% in 81521.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around 81521 are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does fiber internet look like in other zip codes?
Below are zip codes nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Zip Codes
- 81507, CO: less fiber coverage, faster speeds
- 81505, CO: less fiber coverage, faster speeds
- 81506, CO: less fiber coverage, slower speeds
- 81501, CO: less fiber coverage, faster speeds
- 81503, CO: less fiber coverage, faster speeds
- 81504, CO: less fiber coverage, faster speeds
- 81520, CO: less fiber coverage, slower speeds
- 81526, CO: less fiber coverage, slower speeds
- 81624, CO: less fiber coverage, slower speeds
- 84540, UT: less fiber coverage, slower speeds
Zip Codes with Similar Populations
- 92845, CA: more fiber coverage, faster speeds
- 22963, VA: more fiber coverage, slower speeds
- 28714, NC: more fiber coverage, slower speeds
- 29078, SC: less fiber coverage, faster speeds
- 29334, SC: less fiber coverage, faster speeds
- 40212, KY: less fiber coverage, faster speeds
- 77587, TX: more fiber coverage, faster speeds
- 81503, CO: less fiber coverage, faster speeds
- 83858, ID: less fiber coverage, faster speeds
- 85131, AZ: less fiber coverage, faster speeds