In 80603 there are 5 residential Fiber providers covering 20.26% of the zip. The average home can get speeds up to 1,798 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 80603, CO.
To see availability maps for all providers including fiber, cable, DSL, and more in 80603, CO please click below.
Fiber Internet Service Providers in 80603
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 80603 are not shown.
80603 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 80603 is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 20.26% of 80603. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is Quantum Fiber. Call one of the companies with service in 80603 above to see who has service at your home.
How fast is fiber internet in 80603?
The map below shows maximum fiber internet speeds by area in 80603.
Fiber Internet Speed Key
The average 80603 home can get up to 1,798 Mbps on their fiber internet plan. The fastest fiber download speed in the zip is 2,300 Mbps, which 3.15% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 5.03% 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 80603.
Fiber internet speeds tend to be faster in the northwest parts of 80603, and slower in the southeast areas of the zip.
Is fiber the fastest internet I can get in 80603?
The fastest internet for you may vary based on where in 80603 you live. In general, cable competes most often with fiber in the zip.
- Fiber is the fastest internet type for 20.26% of 80603 homes.
- Cable is fastest for 65.58% of the zip.
- DSL is fastest for 1.46%.
- Fixed wireless is fastest for 12.41%.
- Satellite internet may be the only option for less than 1% of 80603 homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in 80603, along with details on where in 80603 and at what speeds.
Quantum Fiber Fiber in 80603, CO
Quantum Fiber fiber coverage
About 12.08%, or 1,959 people, have Quantum Fiber fiber internet available to them in the zip. The company covers the northeast, north, central, and east 80603 area. Quantum Fiber is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of 80603.
Quantum Fiber fiber download speeds
Quantum Fiber is above average when comparing download speeds to all other internet providers in 80603. Versus other fiber providers in the area, Quantum Fiber fiber is above average. There are no different maximum speeds throughout 80603. The fastest plan anyone in 80603 can order from Quantum Fiber goes up to 2,000 Mbps, and all 80603 customers can get this speed.
Show all download speeds
- 100.0% up to 2,000.0 Mbps
Quantum Fiber fiber upload speeds
In 80603 download speeds tend to be faster than than upload speeds for Quantum Fiber fiber. Compared to other ISPs, Quantum Fiber is above average where upload speeds are concerned, and below average compared to other 80603 fiber providers. Quantum Fiber offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 80603 is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
Centurylink Fiber in 80603, CO
Centurylink fiber coverage
About 10.93%, or 1,773 people, have Centurylink fiber internet available to them in the zip. The company covers the northeast, north, central, and east 80603 area. Centurylink is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of 80603.
Centurylink fiber download speeds
Centurylink is above average when comparing download speeds to all other internet providers in 80603. Versus other fiber providers in the area, Centurylink fiber is the slowest. There are 3 different maximum speeds throughout 80603. The fastest plan anyone in 80603 can order from Centurylink goes up to 1,000 Mbps, the slowest package only goes up to 100 Mbps, and the zip-wide average maximum speed for 80603 customers is up to 941 Mbps.
Show all download speeds
- 44.8% up to 1,000.0 Mbps
- 52.1% up to 940.0 Mbps
- 3.0% up to 100.0 Mbps
Centurylink fiber upload speeds
In 80603 download speeds tend to be faster than than upload speeds for Centurylink fiber. Compared to other ISPs, Centurylink is above average where upload speeds are concerned, and below average compared to other 80603 fiber providers. Centurylink offers 5 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 80603 is up to 1,000 Mbps. Some customers have slower plan choices, which only go up to 50 Mbps. On average, Centurylink customers can get speeds up to 892 Mbps.
Show all upload speeds
- 44.8% up to 1,000.0 Mbps
- 44.6% up to 940.0 Mbps
- 2.6% up to 500.0 Mbps
- 5.0% up to 200.0 Mbps
- 3.0% up to 50.0 Mbps
XFINITY from Comcast Fiber in 80603, CO
XFINITY fiber coverage
About 6.44%, or 1,044 people, have XFINITY fiber internet available to them in the zip. The company covers the north and central 80603 area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of 80603.
XFINITY from Comcast fiber download speeds
XFINITY is above average when comparing download speeds to all other internet providers in 80603. Versus other fiber providers in the area, XFINITY fiber is below average. There are no different maximum speeds throughout 80603. The fastest plan anyone in 80603 can order from XFINITY goes up to 1,200 Mbps, and all 80603 customers can get this speed.
Show all download speeds
- 100.0% up to 1,200.0 Mbps
XFINITY from Comcast fiber upload speeds
In 80603 download speeds tend to be faster than than upload speeds for XFINITY fiber. Compared to other ISPs, XFINITY is below average where upload speeds are concerned, and the slowest compared to other 80603 fiber providers. XFINITY offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 80603 is up to 35 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 35.0 Mbps
Viaero Wireless Fiber in 80603, CO
Viaero fiber coverage
About 5.03%, or 816 people, have Viaero fiber internet available to them in the zip. The company covers the southeast 80603 area. Viaero is a large internet service provider internet service providers in the US, with internet service available in a very small piece of 80603.
Viaero Wireless fiber download speeds
Viaero is above average when comparing download speeds to all other internet providers in 80603. Versus other fiber providers in the area, Viaero fiber is below average. There are no different maximum speeds throughout 80603. The fastest plan anyone in 80603 can order from Viaero goes up to 1,000 Mbps, and all 80603 customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Viaero Wireless fiber upload speeds
In 80603 download speeds tend to be equal to than upload speeds for Viaero fiber. Compared to other ISPs, Viaero is above average where upload speeds are concerned, and below average compared to other 80603 fiber providers. Viaero offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 80603 is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
Allo Fiber in 80603, CO
Allo fiber coverage
About 3.15%, or 510 people, have Allo fiber internet available to them in the zip. The company covers the central, north, northwest, and west 80603 area. Allo is a large internet service provider internet service providers in the US, with internet service available in a very small piece of 80603.
Allo fiber download speeds
Allo is the fastest when comparing download speeds to all other internet providers in 80603. Versus other fiber providers in the area, Allo fiber is the fastest. There are no different maximum speeds throughout 80603. The fastest plan anyone in 80603 can order from Allo goes up to 2,300 Mbps, and all 80603 customers can get this speed.
Show all download speeds
- 100.0% up to 2,300.0 Mbps
Allo fiber upload speeds
In 80603 download speeds tend to be equal to than upload speeds for Allo fiber. Compared to other ISPs, Allo is the fastest where upload speeds are concerned, and the fastest compared to other 80603 fiber providers. Allo offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 80603 is up to 2,300 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 2,300.0 Mbps
80603 Fiber by Area
This information is most helpful to those looking for homes or considering moving to 80603 or any of the areas nearby.
How does fiber internet in 80603 compare to the rest of Colorado?
Fiber internet speeds in 80603 are much faster versus the average speeds in Colorado: 0.00 Mbps in Colorado versus 1,798 Mbps in the zip. The state has similar fiber availability compared to the zip. Average fiber coverage in Colorado is 0.00% versus 20.26% in 80603.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around 80603 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
- 80601, CO: more fiber coverage, faster speeds
- 80642, CO: more fiber coverage, slower speeds
- 80621, CO: more fiber coverage, faster speeds
- 80640, CO: less fiber coverage, faster speeds
- 80602, CO: more fiber coverage, faster speeds
- 80022, CO: more fiber coverage, faster speeds
- 80241, CO: less fiber coverage, faster speeds
- 80019, CO: more fiber coverage, slower speeds
- 80514, CO: less fiber coverage, faster speeds
- 80233, CO: more fiber coverage, faster speeds
Zip Codes with Similar Populations
- 82414, WY: more fiber coverage, slower speeds
- 30620, GA: more fiber coverage, faster speeds
- 31513, GA: more fiber coverage, faster speeds
- 31545, GA: less fiber coverage, slower speeds
- 32615, FL: more fiber coverage, slower speeds
- 32922, FL: more fiber coverage, faster speeds
- 32963, FL: more fiber coverage, faster speeds
- 72210, AR: more fiber coverage, faster speeds
- 79029, TX: more fiber coverage, slower speeds
- 80465, CO: more fiber coverage, faster speeds