Internet in Boulder, Colorado
Fiber is available at 45.2% of the 24,774 homes and businesses the FCC counts in Boulder, and wired broadband of at least 100/20 Mbps at 98.4%. 51.7% of locations have a choice of two or more wired providers at that speed; at 46.7% there is only one.1
FCC National Broadband Map, availability as of June 30, 2026 (data revised November 10, 2026), as reported by providers.
Boulder in Colorado
Boulder is a city of one near-universal wire and one partial one. Xfinity's network reaches 98.3% of its homes and businesses; fiber, almost all of it Quantum Fiber, reaches 45.2%. The city's gigabit figure, 99.9%1, rests on a single fixed wireless filing, not on fiber.
Cable reaches nearly every address, fiber fewer than half
Wired internet of at least 100/20 Mbps is reported at 98.4% of Boulder's 24,774 homes and businesses, as of June 30, 2026 (FCC data revision of November 10, 2026). Almost all of that is Xfinity: its cable network reaches 98.3% of locations. The second wire is fiber, reported at 45.2%, the 80th lowest share among the 343 cities of 100,000 or more. Colorado as a whole is at 59.7%1.
| Ayva Networks | Fiber Fixed wireless | 99.9% | 99.9% | 2.5 Gbps | – |
|---|---|---|---|---|---|
| Xfinity | Fiber Cable | 98.3% | 98.3% | 2 Gbps | 46.6% |
| LiveWireNet | Licensed wireless | 94.9% | 94.9% | 250 Mbps | – |
| T-Mobile | Licensed wireless | 76.9% | 33.5% | 100 Mbps | – |
| Verizon | Licensed wireless | 63.7% | 31.9% | 300 Mbps | – |
| AT&T | Fiber Licensed wireless | 62.2% | 49.6% | 8 Gbps | 0.0% |
| CenturyLink | DSL | 51.3% | 6.6% | 140 Mbps | – |
| Rise Broadband | Fixed wireless | 45.6% | 0.0% | 200 Mbps | – |
| Magnolia Road Internet Cooperative | Fixed wireless | 0.0% | 0.0% | 100 Mbps | – |
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, Starlink, Viasat) report service at nearly every location and are left out of the table.
The table counts every provider that reports service in the city, including three satellite companies that report it at every location. "Reported" means the provider told the FCC it can install service within ten business days; anyone can challenge a listing on the FCC map. The city here is Boulder's 2020 Census boundary, not the wider county.
One fast wire at nearly half of locations
Boulder splits into two parts of almost equal size. At 51.7% of locations, two or more wired providers offer 100/20 Mbps: mostly Xfinity and Quantum Fiber, and at a smaller group Xfinity and CenturyLink's faster DSL. At 46.7% there is only one, and it is Xfinity: the cable company is the sole wired option at that speed at 46.6% of the city's locations. Practically no location has three or more wired choices at 100/20, and the two-or-more share, tied for 73rd lowest among large cities, is below Colorado's 57.0%1.
Source: FCC, National Broadband Map, data as of June 30, 2026. Different wired providers (fiber, cable or DSL; FCC provider IDs) reporting 100 Mbps down and 20 Mbps up or more at the same location. Fixed wireless and satellite are not counted.
Show the numbers
| Area | None | One | Two | Three or more |
|---|---|---|---|---|
| Boulder | 1.7% | 46.7% | 51.7% | 0.0% |
| Colorado | 10.6% | 32.4% | 41.8% | 15.2% |
| United States | 7.8% | 36.6% | 44.6% | 11.1% |
The share with two or more wired choices has changed little since the first national map: 48.7%2 in June 2022, 51.7% now. A further 409 locations, 1.7%1, have no wired provider at 100/20 Mbps and depend on fixed wireless for that speed.
Why nearly every location counts as gigabit
Boulder's gigabit figure looks like that of a city wired with fiber everywhere. Service of 1,000/100 Mbps, the FCC's gigabit tier with uploads of at least 100 Mbps, is advertised at 99.9% of locations, up from 0.0%2 in June 2022. Among large cities, that rise of 99.9 percentage points ranks the highest1.
The rise comes from one filer. Ayva Networks, an unlicensed fixed wireless provider, reports service at 24,758 Boulder locations, and in the FCC's location files every one of those records lists a 2.5 Gbps download with an identical upload. The FCC counts 24,758 locations at the gigabit tier: the same set. Ayva did not appear in the June 2022 files, which is why unlicensed fixed wireless went from 11.0%2 of Boulder's locations to 100.0%, against 56.2% for Colorado and 19.7%1 nationally.
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) |
|---|---|---|---|---|
| Gigabit (1,000/100) | 0.0% | 99.4% | 99.9% | 99.9 pts |
| Unlicensed fixed wireless | 11.0% | 97.9% | 100.0% | 88.9 pts |
| Wired 100/100 Mbps | 43.0% | 62.6% | 69.9% | 26.9 pts |
| Fiber available | 43.0% | 45.9% | 45.2% | 2.1 pts |
The wired networks tell a slower story. In June 2022 every one of Xfinity's Boulder cable records listed 1.2 Gbps down and 35 Mbps up, and almost all of CenturyLink's fiber listed 940 Mbps each way, just under the FCC's 1 Gbps line, so practically no location qualified as gigabit. In June 2026 a little over half of Xfinity's records still list 1.2 Gbps and 35 Mbps, and most of the rest list 2 Gbps down and 250 Mbps up. Quantum Fiber's records mostly list 2 Gbps down and 1 Gbps up. Wired service with uploads of at least 100 Mbps, the 100/100 measure, rose from 43.0%2 of locations to 69.9%1. All of these are maximum advertised speeds, not measurements.
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 |
|---|---|---|---|---|---|---|---|
| Boulder | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.1% | 99.9% |
| 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% |
Fiber in Boulder: one network, a new filer
Fiber coverage has barely moved in four years: 43.0%2 in June 2022, 45.9%3 in December 2025 and 45.2% in June 2026. What changed is the name on the filing. In June 2022 Boulder's fiber was filed by CenturyLink; in December 2025, still by CenturyLink, mostly under the Quantum Fiber brand. In the June 2026 files the Quantum Fiber records are filed by AT&T, which reports fiber at 45.1% of the city's locations and advertises up to 8 Gbps. The fiber records CenturyLink still filed under its own name in December are not in the June files, and CenturyLink now appears in Boulder only as a DSL provider, at 51.3% of locations, with 100/20 Mbps at 6.6%1.
The other fiber filers are small. Xfinity reports fiber at 0.2% of locations. That is why two or more fiber networks overlap at only 0.1%1 of locations.
Fixed wireless on three kinds of spectrum
Fixed wireless is reported at 100.0% of Boulder's locations, on three kinds of spectrum. Besides Ayva Networks, Rise Broadband reports unlicensed fixed wireless (FCC technology code 70) at 45.6% of locations, mostly below 100/20 Mbps. LiveWireNet reports service at 94.9% on licensed-by-rule spectrum (code 72), advertising up to 250 Mbps1; it already reported service at about as many locations in June 2022.
The mobile carriers' home internet, on licensed spectrum (code 71), reaches the faster tier at fewer locations. T-Mobile reports service at 76.9% of locations and 100/20 Mbps at 33.5%; Verizon at 63.7% and 31.9%1. AT&T's wireless filing reaches more locations than its fiber but advertises at most 100 Mbps. Carriers decide eligibility address by address, so a reported location is not a promise of capacity.
Longmont, in the same county, looks different
Boulder's numbers stand out most beside the other large city in Boulder County. In Longmont, NextLight reports fiber at 99.9% of locations, and 98.6% have two or more wired choices at 100/20 Mbps; in Boulder the figures are 45.2% and 51.7%1. Fort Collins and Denver also report fiber at higher shares than Boulder.
| Area | Fiber available | Two or more wired choices | Gigabit (1,000/100) | Unlicensed fixed wireless |
|---|---|---|---|---|
| Boulder, Colorado | 45.2% | 51.7% | 99.9% | 100.0% |
| Longmont, Colorado | 99.9% | 98.6% | 99.9% | 45.3% |
| Fort Collins, Colorado | 83.5% | 84.5% | 98.1% | 85.1% |
| Denver, Colorado | 76.9% | 78.9% | 96.0% | 23.7% |
| Colorado | 59.7% | 57.0% | 79.4% | 56.2% |
| United States | 62.6% | 55.6% | 72.3% | 19.7% |
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.
Boulder households and their subscriptions
The Census Bureau's 2025 American Community Survey counts households, not locations, and asks what they pay for. In Boulder 84.2% of households subscribed to cable, fiber or DSL (margin of error ±3.1 percentage points), 8.4% relied only on a cellular data plan (±2.4 percentage points) and 5.3% had no internet subscription (±2.0 percentage points). By point estimate the cellular-only share ranks tied for 34th lowest4 among large cities, though the margin is wide.
The Colorado page covers Boulder County and every other county in the state.
Boulder internet questions
What internet providers are available in Boulder, Colorado?
Xfinity reports service at 98.3% of locations. AT&T reports service at 62.2%, with fiber, under the Quantum Fiber brand, at 45.1%. CenturyLink reports DSL at 51.3%. Fixed wireless comes from Ayva Networks (99.9%), LiveWireNet (94.9%), T-Mobile (76.9%), Verizon (63.7%) and Rise Broadband (45.6%1). Shares are of locations as of June 30, 2026.
Does Boulder have fiber internet?
At 45.2% of the city's 24,774 homes and businesses, as of June 30, 2026, against 59.7% for Colorado and 62.6% for the US. Two or more fiber networks overlap at only 0.1%1 of locations. The FCC map shows whether fiber is reported at one address.
How many internet providers are there in Boulder?
9 ground-based providers report service somewhere in the city, 4 of them over wires and 3 with fiber. At a single location the wired choice at 100/20 Mbps is usually one or two: 46.7% of locations have one, 51.7% have two and 0.0%1 have three or more.
Is gigabit internet available everywhere in Boulder?
Gigabit service with uploads of at least 100 Mbps is reported at 99.9% of locations, but that figure comes from one unlicensed fixed wireless provider, Ayva Networks, which reports a top download of 2.5 Gbps1 almost everywhere. Gigabit over wires depends on Quantum Fiber or Xfinity's upgraded cable at a given address.
Checking one address in Boulder
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 Longmont. Compare Boulder 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
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.