Internet in Longmont, Colorado
Fiber is available at 99.9% of the 30,652 homes and businesses the FCC counts in Longmont, and wired broadband of at least 100/20 Mbps at 99.9%. 98.6% of locations have a choice of two or more wired providers at that speed; at 1.3% there is only one.1
FCC National Broadband Map, availability as of June 30, 2026 (data revised November 10, 2026), as reported by providers.
Longmont in Colorado
Longmont's fiber network was essentially complete before the FCC's map began. NextLight, the community-owned service of Longmont Power & Communications, reported fiber at 99.8%2 of the city's homes and businesses in June 2022 and at 99.9% in June 2026, and Xfinity's cable runs alongside it, so 98.6%1 of locations have two or more wired providers at 100/20 Mbps.
NextLight and Xfinity reach almost every address
As of June 30, 2026 (FCC revision of November 10, 2026), two companies report wired service at nearly all of the 30,652 homes and businesses inside Longmont's city limits. NextLight reports fiber at 99.9% of them, with downloads advertised up to 1 Gbps. Xfinity reports service at 98.6%, almost all of it cable; its fiber reaches 1.0%1. Everything else on the list either covers a small part of the city or offers slower service.
| NextLight | Fiber | 99.9% | 99.9% | 1 Gbps | 1.2% |
|---|---|---|---|---|---|
| Xfinity | Fiber Cable | 98.6% | 98.6% | 2 Gbps | 0.1% |
| CenturyLink | DSL | 86.1% | 11.0% | 140 Mbps | – |
| T-Mobile | Licensed wireless | 76.6% | 18.8% | 100 Mbps | – |
| Verizon | Licensed wireless | 63.7% | 28.1% | 300 Mbps | – |
| Rise Broadband | Fixed wireless | 40.3% | 7.5% | 387 Mbps | – |
| AT&T | Fiber Licensed wireless | 30.1% | 7.4% | 8 Gbps | – |
| Core Fiber | Fiber Fixed wireless | 11.6% | 11.6% | 1 Gbps | – |
| TDS | Cable | 1.3% | 1.3% | 1 Gbps | – |
| Utah Broadband | Fiber | 0.1% | 0.1% | 1 Gbps | – |
Source: FCC, National Broadband Map, data as of June 30, 2026. Share of the area's broadband serviceable locations where the provider reports service as of June 30, 2026. "Only wired option" is the share of locations where it is the single wired provider at 100/20 Mbps. Provider-reported and challengeable; speeds are advertised maximums, not measured; no prices. Satellite providers (HughesNet, Viasat, Starlink) report service at nearly every location and are left out of the table.
A share in the table is the part of the city's locations where a company tells the FCC it can install service within ten business days. It is the provider's own report, it can be challenged on the FCC map, and it says nothing about price, which the FCC does not collect. Locations follow the city limits as drawn for the 2020 Census.
A city network built before the map
NextLight is not a private carrier. Its own history page describes it as community-owned, announced by Longmont Power & Communications in 2014 and built in a six-phase construction project that began the same year. By the time of the FCC's first National Broadband Map release, as of June 30, 2022, fiber already reached 99.8%2 of Longmont's locations.
That head start explains an unusual line in the rankings. Longmont's fiber share of 99.9% is tied for 3rd highest among the 343 cities of 100,000 or more, well above the large-city median of 74.0%. Its change since 2022, +0.1 percentage points, is tied for 18th lowest1: other cities have added fiber since 2022, and Longmont had little left to add.
Source: FCC, National Broadband Map, data as of June 30, 2026. FCC file revision of November 10, 2026. Shares are of broadband serviceable locations (homes and businesses), not people.
Show the numbers
| Area | Fiber available |
|---|---|
| Longmont | 99.9% |
| Fort Collins | 83.5% |
| Denver | 76.9% |
| Colorado Springs | 74.0% |
| United States | 62.6% |
| Colorado | 59.7% |
| Aurora | 52.2% |
| Boulder | 45.2% |
Fort Collins, the other Front Range city with a city-owned fiber utility, is still building toward that point: Connexion reports fiber at 82.7%1 of its locations. Boulder, in the same county as Longmont, has a much smaller fiber share; the Boulder page compares the two cities.
Two wires, rarely one
Because the fiber and the cable network overlap almost everywhere, a choice of wired provider is the normal case. At 98.6% of locations two or more wired providers offer 100/20 Mbps, the 3rd highest share among large cities, against 57.0% for Colorado. Three or more are available at 17.3%1.
Only 1.3% of locations have a single wired provider at that speed, and NextLight is that provider at 1.2%. The share has edged up from 0.7% in June 2022, while the two-or-more share fell by 0.7 percentage points. Over the same years Xfinity's cable footprint narrowed slightly: cable was reported at 99.4%2 of locations in 2022 and 97.7%1 in 2026.
The gaps are counted in dozens, not thousands. 22 locations have no wired provider at 100/20 Mbps; 5 reach that speed only by fixed wireless, 17 have no ground-based provider at that speed, and 41 rely on satellite alone. The FCC map's address search shows which applies to a given home.
Copper still on the books
DSL is reported more widely in Longmont than in almost any other large city. CenturyLink files DSL at 86.1% of locations, putting the city's DSL share at 86.1%, 6th highest among the 343 cities, against 57.3% for Colorado and 36.2% nationally. Its advertised maximum is 140 Mbps, and 100/20 Mbps is reported at only 11.0%1 of locations. The DSL share has not shrunk since 2022, when it was 84.9%2.
Source: FCC, National Broadband Map, data as of June 30, 2026. Share of broadband serviceable locations where at least one provider reports the technology, at any speed; a location can have several. Satellite is reported almost everywhere and is left out.
Show the numbers
| Technology | Longmont | Colorado |
|---|---|---|
| Fiber | 99.9% | 59.7% |
| Cable | 97.7% | 81.9% |
| DSL (copper) | 86.1% | 57.3% |
| Licensed fixed wireless (incl. 5G home) | 88.7% | 91.4% |
| Unlicensed fixed wireless | 45.3% | 56.2% |
AT&T reported no Longmont locations in June 2022. It now reports 30.1%, mostly fixed wireless, with fiber at 5.1% and downloads advertised up to 8 Gbps. Where AT&T's fiber, or Xfinity's, overlaps NextLight, a home has two or more fiber networks: 5.4%1 of locations in June 2026, 5.9%3 six months earlier and 4.5%2 in 2022. The Denver page explains how fiber once filed by CenturyLink there came to appear under AT&T.
Top advertised speeds swung between filings
Nearly every location has gigabit service with fast uploads: 1,000/100 Mbps is advertised at 99.9% and symmetrical 100/100 Mbps at 99.9%1, both close to their June 2022 levels of 99.8% and 99.8%2.
The fastest advertised tier has moved more than the network. The share of locations where the top advertised download is 2 Gbps or more was 0.0%2 in June 2022, 99.9%3 in December 2025 and 17.9% in June 2026; at 82.0% the top tier is now about 1 Gbps. These figures follow what providers filed in each release, and Xfinity advertises up to 2 Gbps1 at only part of its footprint. All are advertised maximums, not measured speeds.
Source: FCC, National Broadband Map, data as of June 30, 2026. Maximum advertised download speed (Mbps) of any wired or fixed wireless offer at the location, as reported by providers to the FCC; satellite excluded. Advertised, not measured.
Show the numbers
| Area | Under 25 Mbps or none | 25–99 | 100–249 | 250–499 | 500–939 | 940–1,999 | 2,000 or more |
|---|---|---|---|---|---|---|---|
| Longmont | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 82.0% | 17.9% |
| Colorado | 2.3% | 1.7% | 2.5% | 2.0% | 1.6% | 18.7% | 71.2% |
| United States | 2.4% | 1.6% | 1.8% | 1.4% | 0.9% | 31.0% | 61.0% |
Fixed wireless: faster licensed service, less unlicensed
Licensed fixed wireless, the category that includes 5G home internet, is reported at 88.7% of locations, tied for 55th lowest among large cities and down from 96.2% in 2022, while unlicensed fixed wireless fell from 57.7% in 2022 to 45.3%. T-Mobile reports 76.6% of locations and Verizon 63.7%; at 100/20 Mbps or more the licensed carriers together reach 38.8%, up from 26.9%2 in 2022. Rise Broadband reports unlicensed service at 40.3%, and Core Fiber reports fixed wireless at 11.6%1.
Source: FCC, National Broadband Map, data as of June 30, 2022; FCC, National Broadband Map, data as of December 31, 2025; FCC, National Broadband Map, data as of June 30, 2026. Shares of broadband serviceable locations in each FCC release (latest revision of each); the small number is the change in percentage points since June 30, 2022. The FCC's count of locations is updated with each release, so shares are compared rather than counts.
Show the numbers
| Measure | June 30, 2022 | December 31, 2025 | June 30, 2026 | Change (points) |
|---|---|---|---|---|
| Fiber available | 99.8% | 99.9% | 99.9% | 0.1 pts |
| Licensed fixed wireless | 96.2% | 87.0% | 88.7% | −7.5 pts |
| Unlicensed fixed wireless | 57.7% | 56.9% | 45.3% | −12.4 pts |
| Fixed wireless 100/20 | 26.9% | 39.2% | 38.8% | 11.9 pts |
Wireless capacity is shared on each tower sector, so carriers can decline an address even where they report service.
Subscriptions in Longmont
The Census Bureau's 2025 American Community Survey asks households what they pay for. In Longmont, 84.4% of households subscribed to cable, fiber or DSL (margin of error ±2.9 percentage points), 10.0% relied only on a cellular data plan (±2.9 percentage points) and 3.8% had no internet subscription (±2.3 percentage points). Any broadband subscription was reported by 96.2% (±2.3 percentage points4), against 92.2% (±2.3 percentage points5) in 2019. The survey counts households over a year and the FCC counts locations on one date, so the two show direction rather than an exact gap.
Source: FCC, National Broadband Map, data as of June 30, 2026; Census Bureau, American Community Survey 2025 1-year detailed tables. Availability is a share of locations as of June 30, 2026 (FCC); subscriptions are a share of households from the American Community Survey, 2025 (whiskers: 90% margin of error). Different units and dates: read the gap as a sign, not an exact number.
Show the numbers
| Measure | Share | MOE |
|---|---|---|
| Wired 100/20 Mbps available (FCC, share of locations) | 99.9% | |
| Households subscribing to cable, fiber or DSL (Census) | 84.4% | ±2.9 |
| Households relying only on a cellular data plan | 10.0% | ±2.9 |
| Households with no internet subscription | 3.8% | ±2.3 |
The Colorado page covers Boulder County and every other county in the state.
Longmont internet questions
What internet providers are available in Longmont?
Two wired providers cover nearly the whole city: NextLight (99.9% of locations, fiber) and Xfinity (98.6%, almost all cable). CenturyLink reports DSL at 86.1%, AT&T reports fiber at 5.1%1, and T-Mobile, Verizon, AT&T and Rise Broadband report fixed wireless. Satellite is reported everywhere. Figures are as of June 30, 2026.
Is NextLight fiber available everywhere in Longmont?
Nearly. NextLight reports fiber at 99.9% of the 30,652 homes and businesses inside the city limits, as of June 30, 2026. Fiber from any provider reaches 99.9%, against 59.7% across Colorado and 62.6%1 nationally.
How many internet providers are in Longmont?
7 wired providers report service somewhere in the city, 5 of them with fiber, and 10 ground-based providers in all once fixed wireless is counted. At a typical location the number of wired providers offering 100/20 Mbps is 2.161 on average. Satellite companies are not counted.
Is 5G home internet available in Longmont?
T-Mobile reports home internet over its licensed wireless network at 76.6% of locations and Verizon at 63.7%, with 100/20 Mbps or more at 18.8% and 28.1%1. The carriers decide eligibility address by address.
Checking one address in Longmont
The figures on this page describe the whole area. Which providers report service at a single home or apartment is shown only on the FCC's own map: search the address at broadbandmap.fcc.gov. If a provider is listed there but cannot actually connect you within ten business days, or the location is missing or misplaced, the map has a button to file a challenge; providers must respond, and corrections flow into later releases. Prices and plans are not part of the FCC data: each provider must show them on its broadband facts label at the point of sale.
More on internet in Colorado
The state picture, county by county: internet in Colorado. Other large cities in the state: Denver, Colorado Springs, Aurora, Fort Collins, Lakewood, Thornton, Arvada, Westminster, Greeley, Pueblo, Centennial and Boulder. Compare Longmont with any other city or state in the comparison tool.
Sources
- FCC, National Broadband Map, data as of June 30, 2026; Availability as of June 30, 2026; released November 10, 2026. broadbandmap.fcc.gov
- FCC, National Broadband Map, data as of June 30, 2022; Availability as of June 30, 2022; released May 10, 2024. broadbandmap.fcc.gov
- FCC, National Broadband Map, data as of December 31, 2025; Availability as of December 31, 2025; released November 3, 2026. broadbandmap.fcc.gov
- Census Bureau, American Community Survey 2025 1-year detailed tables; 2025 (calendar-year sample); released October 29, 2026. api.census.gov
- Census Bureau, American Community Survey 2019 1-year detailed tables; 2019. api.census.gov
Margins of error (±) are at the 90% confidence level. A difference is called significant only when it passes the Census Bureau's test at that level. How every figure is built: methodology. Found an error? Write to [email protected]; corrections are listed on the updates page.