Underline is a large internet service provider in the United States, serving 1 state or territory: Colorado. Learn more about Underline's coverage and availability on this page.
Can I get Underline internet in my area?
The easiest way to find out is to click the link below.
You may enter your zip code to check local availability or view the map below before contacting Underline.
Underline Availability Map
Any Internet Availability
On the map you can see Underline's coverage area in the United States. Areas in green are most likely to have coverage, where some homes in yellow to red areas may not have coverage.
The table below shows coverage and average maximum speeds by state.
| State | Availaiblity | Average Best Speed |
|---|---|---|
| Colorado | 2.28% | 1,000 Mbps |
How fast is Underline's internet?
Internet Download Speed
The map above shows average maximum speeds by area. Overall, Underline internet speeds are adequate for most homes.
Download speeds (the speed at which you receive files and streaming video) range from 1,000 to 1,000 Mbps. The average customer has access to plans with download speeds up to 1,000 Mbps. This puts Underline in the 65th percentile versus other ISPs for download speeds, meaning speeds are noticeabley faster than the average provider in the US.
Upload speeds (the speed you can send files and video to others) range from a low of 1,000 Mbps to a high of 1,000 Mbps. The average is 1,000 Mbps, placing Underline in the 70th percentile for internet provider upload speeds, which is fast enough for a modern household.
What broadband services does Underline offer?
Across the country Underline offers fiber internet service. The table below shows which types of service Underline offers and the average maximum speed for each service type. “Coverage” is the percent of Underline customers who can get that type of service.
Technology |
Coverage |
Average Best Speed |
|---|---|---|
Fiber |
100.00% |
1,000 Mbps |
Can I get Underline TV Service?
Probably. Most fiber optic and cable companies are able to offer some kind of TV service. In either case, you can also get Underline internet and satellite TV.
What cities and zips does Underline serve?
With coverage in 4 cities and 12 zip codes, only the largest are listed below:
City |
Availability |
Average Best Speed |
|---|---|---|
| Colorado Springs, CO | 17.40% | 1,000 Mbps |
| Security-Widefield, CO | 30.52% | 1,000 Mbps |
| Fountain, CO | 16.99% | 1,000 Mbps |
| Manitou Springs, CO | 9.62% | 1,000 Mbps |
Zip |
Availability |
Average Best Speed |
| 80909, CO | 82.70% | 1,000 Mbps |
| 80910, CO | 51.75% | 1,000 Mbps |
| 80904, CO | 77.03% | 1,000 Mbps |
| 80907, CO | 54.83% | 1,000 Mbps |
| 80905, CO | 83.36% | 1,000 Mbps |
| 80903, CO | 86.46% | 1,000 Mbps |
| 80911, CO | 34.30% | 1,000 Mbps |
| 80817, CO | 17.15% | 1,000 Mbps |
| 80906, CO | 10.83% | 1,000 Mbps |
| 80915, CO | 5.49% | 1,000 Mbps |
| 80829, CO | 9.68% | 1,000 Mbps |
| 80918, CO | 0.06% | 1,000 Mbps |