Internet Service in Thornton, Colorado
Fiber is available at 55.0% of the 43,946 homes and businesses the FCC counts in Thornton, and wired broadband of at least 100/20 Mbps at 99.8%. 61.1% of locations have a choice of two or more wired providers at that speed; at 38.6% there is only one.1
FCC National Broadband Map, availability as of June 30, 2026 (data revised November 10, 2026), as reported by providers.
Thornton in Colorado
In June 2022, 75.7% of Thornton's homes and businesses had a single wired provider offering 100/20 Mbps, and fiber reached 12.8%2. Two fiber networks, Quantum Fiber and Intrepid Fiber Networks, have since spread across the city, and fiber now reaches 55.0%. Xfinity's cable still covers nearly every address, and at 38.6%1 of locations it is the only wired provider offering 100/20 Mbps.
Xfinity almost everywhere, fiber at about half
Xfinity is the one provider that reports fast wired service nearly everywhere in Thornton: 99.7% of the city's 43,9461 homes and businesses, as of June 30, 2026 (FCC file revision of November 10, 2026). Alongside it in the table are two fiber networks that have spread across the city since 2022, CenturyLink's copper telephone lines and several fixed wireless services. Satellite service from Starlink, HughesNet and Viasat is reported at every location, as it is across the country.
| Xfinity | Fiber Cable | 99.7% | 99.7% | 2 Gbps | 38.6% |
|---|---|---|---|---|---|
| T-Mobile | Licensed wireless | 75.2% | 14.7% | 100 Mbps | – |
| Rise Broadband | Fixed wireless | 74.3% | 47.4% | 641 Mbps | – |
| CenturyLink | DSL | 64.9% | 10.7% | 140 Mbps | – |
| Verizon | Licensed wireless | 63.3% | 18.2% | 300 Mbps | – |
| AT&T | Fiber Licensed wireless | 62.3% | 40.4% | 8 Gbps | 0.0% |
| Intrepid Fiber Networks | Fiber | 32.7% | 32.7% | 2 Gbps | – |
| AERUX BROADBAND | Fixed wireless | 2.6% | 2.6% | 100 Mbps | – |
| LiveWireNet | Licensed wireless | 2.1% | 2.1% | 250 Mbps | – |
| ALLO Fiber | Fiber | 1.9% | 1.9% | 2.3 Gbps | 0.0% |
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.
Each share is the part of the city's locations where the company tells the FCC it provides service, or could install it within ten business days. It is not a promise for any one address, and the FCC map accepts challenges where a listing is wrong. The figures cover Thornton's limits as of the 2020 Census; nearly all of the city's census blocks lie in Adams County, with a few in Weld County, according to the Census Bureau's block assignment file.
Fiber since 2022: from one network to several
In June 2022, fiber reached 12.8%2 of Thornton's locations, nearly all of it filed by CenturyLink. By December 2025 the share was 40.5%3, and by June 2026 55.0%. The rise of 14.5 percentage points in those last six months was the 8th highest among the 343 cities of 100,000 or more, and the four-year gain of 42.2 percentage points ranks 54th highest1.
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 | 12.8% | 40.5% | 55.0% | 42.2 pts |
| Two or more fiber networks | 0.0% | 10.5% | 15.2% | 15.2 pts |
| One wired choice | 75.7% | 50.5% | 38.6% | −37.0 pts |
Two companies account for most of the growth.
- Quantum Fiber. In the FCC's June 2026 files the Quantum Fiber brand is filed by AT&T; in the December 2025 files the same brand was filed by CenturyLink. AT&T therefore appears as new since 2022, with fiber at 34.8% of locations and advertised downloads of up to 8 Gbps. CenturyLink is now listed only for DSL, at 64.9% of locations, and offers 100/20 Mbps at only 10.7%.
- Intrepid Fiber Networks. It reported no Thornton service in 2022 and now reports fiber at 32.7% of locations, with advertised speeds of up to 2 Gbps in both directions. Colorado is its largest state in the FCC data, with 103,998 locations; it reports a similar share next door in Westminster (33.0%1).
Readers comparing older listings may also notice Ting. In the December 2025 files Ting reported fiber at a set of Thornton locations; in June 2026 it reports none in the city, and most of those addresses already had Intrepid fiber. Allo Communications reports fiber at 1.9%1 of locations.
The two big builds overlap only in part: 15.2% of locations have two or more fiber providers. Even after the growth, Thornton's fiber share is below Colorado's 59.7%, the national 62.6% and the 74.0%1 median for large cities.
New Bedford, Massachusetts 0.0%Clarksville, Tennessee 100.0%
Source: FCC, National Broadband Map, data as of June 30, 2026. Each dot is a city. FCC file revision of November 10, 2026. Shares are of broadband serviceable locations (homes and businesses), not people.
Show the numbers
| Area | Fiber available |
|---|---|
| Chattanooga, Tennessee | 100.0% |
| Clarksville, Tennessee | 100.0% |
| Lincoln, Nebraska | 99.9% |
| Simi Valley, California | 99.9% |
| Longmont, Colorado | 99.9% |
| Overland Park, Kansas | 99.3% |
| Knoxville, Tennessee | 99.0% |
| Olathe, Kansas | 98.1% |
| Amarillo, Texas | 98.0% |
| Greeley, Colorado | 97.6% |
| Kansas City, Missouri | 97.4% |
| Abilene, Texas | 97.2% |
| Rio Rancho, New Mexico | 97.0% |
| Bridgeport, Connecticut | 96.8% |
| Sugar Land, Texas | 96.6% |
| Yonkers, New York | 96.3% |
| Independence, Missouri | 96.2% |
| Wichita Falls, Texas | 95.8% |
| Lee's Summit, Missouri | 95.8% |
| Philadelphia, Pennsylvania | 95.7% |
| Elizabeth, New Jersey | 95.4% |
| Miami Gardens, Florida | 95.4% |
| Cary, North Carolina | 95.1% |
| Lynn, Massachusetts | 95.0% |
| Palm Coast, Florida | 94.8% |
| Paterson, New Jersey | 94.7% |
| Pittsburgh, Pennsylvania | 94.7% |
| Davenport, Iowa | 94.3% |
| Kansas City, Kansas | 94.2% |
| Conroe, Texas | 94.1% |
| Cape Coral, Florida | 94.0% |
| San Angelo, Texas | 94.0% |
| Pearland, Texas | 93.9% |
| Menifee, California | 93.8% |
| Newark, New Jersey | 93.7% |
| Des Moines, Iowa | 93.6% |
| Frisco, Texas | 93.5% |
| Stamford, Connecticut | 93.5% |
| Round Rock, Texas | 93.3% |
| Springfield, Missouri | 93.0% |
| Newport News, Virginia | 92.9% |
| West Valley City, Utah | 92.9% |
| Huntsville, Alabama | 92.8% |
| Columbia, Missouri | 92.6% |
| Temecula, California | 92.6% |
| Fishers, Indiana | 92.5% |
| Murrieta, California | 92.3% |
| Killeen, Texas | 92.3% |
| Lubbock, Texas | 92.2% |
| Minneapolis, Minnesota | 92.0% |
| Berkeley, California | 91.6% |
| Lexington, Kentucky | 91.6% |
| St. Paul, Minnesota | 91.6% |
| Garland, Texas | 91.6% |
| Lafayette, Louisiana | 91.6% |
| Raleigh, North Carolina | 91.5% |
| Mesquite, Texas | 91.5% |
| High Point, North Carolina | 91.2% |
| Providence, Rhode Island | 91.1% |
| Jersey City, New Jersey | 91.1% |
| Richmond, Virginia | 91.0% |
| Allen, Texas | 91.0% |
| Hillsboro, Oregon | 91.0% |
| Yuma, Arizona | 90.9% |
| Plano, Texas | 90.7% |
| New York, New York | 90.3% |
| Carrollton, Texas | 90.3% |
| Wichita, Kansas | 90.3% |
| Brockton, Massachusetts | 90.1% |
| Oakland, California | 90.1% |
| Cincinnati, Ohio | 90.1% |
| Rochester, Minnesota | 90.1% |
| Honolulu, Hawaii | 90.0% |
| Salt Lake City, Utah | 89.8% |
| Tyler, Texas | 89.8% |
| Norman, Oklahoma | 89.7% |
| Norfolk, Virginia | 89.6% |
| Durham, North Carolina | 89.5% |
| South Fulton, Georgia | 89.5% |
| McKinney, Texas | 89.4% |
| League City, Texas | 89.4% |
| Carmel, Indiana | 89.3% |
| Richardson, Texas | 89.2% |
| West Jordan, Utah | 88.8% |
| Fort Wayne, Indiana | 88.8% |
| Concord, North Carolina | 88.7% |
| Allentown, Pennsylvania | 88.7% |
| Louisville, Kentucky | 88.6% |
| San Mateo, California | 88.3% |
| Buckeye, Arizona | 88.3% |
| Omaha, Nebraska | 88.2% |
| Chesapeake, Virginia | 88.2% |
| San Antonio, Texas | 88.2% |
| Tampa, Florida | 87.9% |
| Broken Arrow, Oklahoma | 87.9% |
| Fayetteville, North Carolina | 87.8% |
| Provo, Utah | 87.6% |
| Lansing, Michigan | 87.6% |
| Arlington, Texas | 87.4% |
| Washington, District of Columbia | 87.4% |
| Surprise, Arizona | 87.4% |
| Grand Prairie, Texas | 87.4% |
| Boston, Massachusetts | 87.3% |
| New Haven, Connecticut | 87.2% |
| Pembroke Pines, Florida | 87.2% |
| Murfreesboro, Tennessee | 87.1% |
| Hesperia, California | 87.1% |
| Miramar, Florida | 86.8% |
| Centennial, Colorado | 86.8% |
| Nashville, Tennessee | 86.6% |
| Downey, California | 86.2% |
| Manchester, New Hampshire | 86.1% |
| Fort Worth, Texas | 86.0% |
| Pueblo, Colorado | 85.0% |
| Virginia Beach, Virginia | 84.8% |
| Fayetteville, Arkansas | 84.8% |
| Pasadena, Texas | 84.6% |
| Dallas, Texas | 84.4% |
| Waterbury, Connecticut | 84.3% |
| Hialeah, Florida | 83.9% |
| Topeka, Kansas | 83.8% |
| Charlotte, North Carolina | 83.6% |
| Long Beach, California | 83.6% |
| Fort Collins, Colorado | 83.5% |
| Everett, Washington | 83.0% |
| Thousand Oaks, California | 83.0% |
| Irving, Texas | 82.8% |
| Midland, Texas | 82.8% |
| Lancaster, California | 82.5% |
| Alexandria, Virginia | 82.4% |
| Austin, Texas | 82.4% |
| Port St. Lucie, Florida | 82.1% |
| Victorville, California | 82.0% |
| Houston, Texas | 81.9% |
| Ontario, California | 81.9% |
| Greensboro, North Carolina | 81.8% |
| Grand Rapids, Michigan | 81.6% |
| Pomona, California | 81.4% |
| Oklahoma City, Oklahoma | 81.1% |
| Coral Springs, Florida | 80.9% |
| West Covina, California | 80.7% |
| Gresham, Oregon | 80.7% |
| Lowell, Massachusetts | 80.3% |
| Odessa, Texas | 80.0% |
| Seattle, Washington | 79.9% |
| Portland, Oregon | 79.5% |
| Mobile, Alabama | 79.3% |
| Goodyear, Arizona | 79.2% |
| Baton Rouge, Louisiana | 78.2% |
| Richmond, California | 78.2% |
| Atlanta, Georgia | 78.1% |
| Corpus Christi, Texas | 78.1% |
| Tallahassee, Florida | 78.0% |
| Peoria, Illinois | 77.8% |
| Denton, Texas | 77.5% |
| Hollywood, Florida | 77.0% |
| Denver, Colorado | 76.9% |
| Daly City, California | 76.9% |
| Spokane, Washington | 76.9% |
| Miami, Florida | 76.8% |
| Fullerton, California | 76.8% |
| Deltona, Florida | 76.4% |
| Lewisville, Texas | 75.9% |
| Tuscaloosa, Alabama | 75.8% |
| Little Rock, Arkansas | 75.2% |
| Meridian, Idaho | 75.1% |
| Hartford, Connecticut | 74.9% |
| Suffolk, Virginia | 74.9% |
| Indianapolis, Indiana | 74.8% |
| Westminster, Colorado | 74.8% |
| Green Bay, Wisconsin | 74.4% |
| Colorado Springs, Colorado | 74.0% |
| Nampa, Idaho | 74.0% |
| Sandy Springs, Georgia | 73.7% |
| Jacksonville, Florida | 73.3% |
| Tulsa, Oklahoma | 73.3% |
| Chula Vista, California | 72.5% |
| Lakewood, Colorado | 72.1% |
| Madison, Wisconsin | 71.6% |
| Edmond, Oklahoma | 71.5% |
| New Braunfels, Texas | 71.3% |
| Elk Grove, California | 70.9% |
| Hampton, Virginia | 70.8% |
| Columbia, South Carolina | 70.4% |
| Moreno Valley, California | 70.0% |
| Huntington Beach, California | 69.9% |
| St. Petersburg, Florida | 69.9% |
| Syracuse, New York | 69.7% |
| Orlando, Florida | 69.7% |
| Milwaukee, Wisconsin | 69.5% |
| Waco, Texas | 69.2% |
| Brownsville, Texas | 69.2% |
| South Bend, Indiana | 69.1% |
| San Bernardino, California | 69.0% |
| Wilmington, North Carolina | 68.9% |
| Fort Lauderdale, Florida | 68.5% |
| West Palm Beach, Florida | 67.6% |
| Torrance, California | 67.3% |
| Winston-Salem, North Carolina | 67.2% |
| Santa Maria, California | 67.0% |
| Garden Grove, California | 66.2% |
| Beaumont, Texas | 65.6% |
| Laredo, Texas | 65.2% |
| Hayward, California | 65.1% |
| St. Louis, Missouri | 65.1% |
| St. George, Utah | 64.5% |
| Evansville, Indiana | 63.6% |
| Gainesville, Florida | 62.9% |
| Lakeland, Florida | 62.9% |
| Davie, Florida | 62.7% |
| Springfield, Illinois | 62.6% |
| Sparks, Nevada | 62.6% |
| Palm Bay, Florida | 62.6% |
| Shreveport, Louisiana | 62.5% |
| Savannah, Georgia | 62.2% |
| Memphis, Tennessee | 62.1% |
| Dayton, Ohio | 61.8% |
| Boca Raton, Florida | 61.5% |
| Pompano Beach, Florida | 61.4% |
| Columbus, Georgia | 61.3% |
| Roseville, California | 61.1% |
| Oxnard, California | 61.0% |
| San Francisco, California | 60.8% |
| Peoria, Arizona | 60.8% |
| Montgomery, Alabama | 60.7% |
| Sacramento, California | 60.1% |
| El Paso, Texas | 60.0% |
| Buffalo, New York | 59.9% |
| Rockford, Illinois | 58.7% |
| Edinburg, Texas | 58.6% |
| Mesa, Arizona | 58.6% |
| College Station, Texas | 58.3% |
| Athens, Georgia | 57.1% |
| Clearwater, Florida | 57.0% |
| New Orleans, Louisiana | 56.9% |
| Cleveland, Ohio | 56.1% |
| Charleston, South Carolina | 55.4% |
| Sioux Falls, South Dakota | 55.1% |
| Akron, Ohio | 55.1% |
| Fort Myers, Florida | 55.0% |
| Thornton, Colorado | 55.0% |
| Reno, Nevada | 54.0% |
| Birmingham, Alabama | 53.5% |
| Rochester, New York | 53.3% |
| Scottsdale, Arizona | 53.2% |
| Santa Ana, California | 53.1% |
| Tacoma, Washington | 53.1% |
| Toledo, Ohio | 52.8% |
| Ann Arbor, Michigan | 52.7% |
| Inglewood, California | 52.4% |
| Irvine, California | 52.3% |
| Aurora, Colorado | 52.2% |
| Los Angeles, California | 51.9% |
| Burbank, California | 51.8% |
| Santa Clara, California | 51.7% |
| Glendale, Arizona | 50.9% |
| Jackson, Mississippi | 50.3% |
| Arvada, Colorado | 50.2% |
| Warren, Michigan | 49.8% |
| Sunnyvale, California | 49.7% |
| Macon, Georgia | 49.3% |
| Eugene, Oregon | 49.0% |
| Costa Mesa, California | 47.7% |
| Boulder, Colorado | 45.2% |
| Henderson, Nevada | 44.9% |
| Pasadena, California | 44.8% |
| Las Vegas, Nevada | 44.8% |
| San Diego, California | 44.6% |
| Billings, Montana | 44.3% |
| North Las Vegas, Nevada | 44.1% |
| San Jose, California | 43.9% |
| McAllen, Texas | 43.7% |
| El Cajon, California | 43.6% |
| North Charleston, South Carolina | 43.2% |
| Vancouver, Washington | 42.9% |
| Vallejo, California | 42.9% |
| Chandler, Arizona | 41.1% |
| Springfield, Massachusetts | 41.1% |
| Aurora, Illinois | 41.1% |
| Dearborn, Michigan | 40.8% |
| Columbus, Ohio | 40.4% |
| Fresno, California | 39.6% |
| Glendale, California | 39.5% |
| Georgetown, Texas | 38.5% |
| Gilbert, Arizona | 38.4% |
| Riverside, California | 38.3% |
| Fremont, California | 38.2% |
| Antioch, California | 37.7% |
| Stockton, California | 37.2% |
| Concord, California | 37.0% |
| Avondale, Arizona | 37.0% |
| Palmdale, California | 36.9% |
| Chicago, Illinois | 36.6% |
| Boise, Idaho | 36.1% |
| Anaheim, California | 36.0% |
| Carlsbad, California | 36.0% |
| Las Cruces, New Mexico | 36.0% |
| Bakersfield, California | 35.5% |
| Santa Rosa, California | 35.5% |
| Worcester, Massachusetts | 35.3% |
| Cedar Rapids, Iowa | 35.2% |
| Bend, Oregon | 35.2% |
| Clovis, California | 34.9% |
| Albuquerque, New Mexico | 34.0% |
| Tucson, Arizona | 34.0% |
| Augusta, Georgia | 34.0% |
| El Monte, California | 33.8% |
| Phoenix, Arizona | 31.4% |
| Salinas, California | 31.2% |
| Chico, California | 30.7% |
| Fontana, California | 30.5% |
| Modesto, California | 29.7% |
| Orange, California | 28.7% |
| Joliet, Illinois | 27.8% |
| Jurupa Valley, California | 27.8% |
| Detroit, Michigan | 27.4% |
| Bellevue, Washington | 27.4% |
| Visalia, California | 27.3% |
| Elgin, Illinois | 27.3% |
| Salem, Oregon | 26.9% |
| Oceanside, California | 26.7% |
| Tracy, California | 24.2% |
| Ventura, California | 23.8% |
| Fargo, North Dakota | 22.6% |
| Tempe, Arizona | 22.3% |
| Sterling Heights, Michigan | 22.0% |
| Fairfield, California | 21.8% |
| Rancho Cucamonga, California | 21.7% |
| Rialto, California | 20.7% |
| Spokane Valley, Washington | 20.6% |
| Vacaville, California | 18.6% |
| Santa Clarita, California | 18.3% |
| Naperville, Illinois | 18.0% |
| Baltimore, Maryland | 16.7% |
| Kent, Washington | 15.9% |
| Escondido, California | 15.6% |
| Corona, California | 13.0% |
| Renton, Washington | 10.5% |
| Quincy, Massachusetts | 9.0% |
| Anchorage, Alaska | 6.2% |
| Albany, New York | 2.0% |
| Cambridge, Massachusetts | 0.5% |
| New Bedford, Massachusetts | 0.0% |
A second wired choice now at most locations
Before the fiber builds, a choice of wired provider was the exception. In June 2022, 75.7%2 of locations had exactly one wired provider offering 100/20 Mbps, almost always Xfinity. That share fell to 50.5%3 by December 2025 and 38.6% by June 2026. Meanwhile, locations with two or more wired providers at that speed rose to 61.1%, above Colorado's 57.0%. The increase of 11.9 percentage points since December 2025 alone ranks 13th highest1 among large cities.
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 |
|---|---|---|---|---|
| Thornton | 0.2% | 38.6% | 43.4% | 17.7% |
| Westminster | 0.2% | 22.2% | 38.1% | 39.6% |
| Colorado | 10.6% | 32.4% | 41.8% | 15.2% |
| United States | 7.8% | 36.6% | 44.6% | 11.1% |
Where neither fiber network has arrived, Xfinity remains the only fast wire. CenturyLink's DSL lines are still reported at 64.9%1 of locations, down from 71.6%2 in 2022, but most of them fall short of 100/20 Mbps.
Gigabit service reaches beyond the fiber
Thornton's gigabit share is far larger than its fiber share, and the difference is Xfinity's cable. The FCC's gigabit tier requires a 1,000 Mbps download and a 100 Mbps upload. In June 2022 it was advertised at 0.0%2 of locations: Xfinity's Thornton cable records in the FCC's Colorado files listed 1.2 Gbps down and 35 Mbps up, and CenturyLink's fiber was listed mostly at 940 Mbps. By December 2025 most of Xfinity's cable records listed 2 Gbps down and 250 Mbps up, and gigabit service was advertised at 92.1%3. In June 2026 the share is 94.9%, above Colorado's 79.4%; a small group of cable records now lists 2 Gbps in both directions, while a larger group still lists 1.2 Gbps and 35 Mbps. Its rise of 94.9 percentage points since 2022 ranks 24th highest1 among large cities.
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 |
|---|---|---|---|---|---|---|---|
| Thornton | 0.0% | 0.0% | 0.0% | 0.1% | 0.1% | 4.9% | 94.9% |
| 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% |
The fastest advertised download is 2 Gbps or more at 94.9% of locations. Quantum Fiber lists up to 8 Gbps; Xfinity's highest listing, 2 Gbps, is for fiber at a handful of business locations. Wired service of 100/100 Mbps or more is reported at 95.2%1. All of these are the maximum speeds providers advertise in their filings, not results of speed tests.
Fixed wireless: Rise Broadband and the mobile carriers
Fixed wireless covers almost all of Thornton, but often below 100/20 Mbps. Rise Broadband, which uses unlicensed spectrum, reports service at 74.3% of locations and 100/20 Mbps or faster at 47.4%, more than any other wireless provider here. Unlicensed fixed wireless now reaches 74.8% of locations, up from 42.6%2 in 2022, the 56th highest share among large cities. T-Mobile reports 5G or LTE home internet at 75.2% and Verizon at 63.3%, and AT&T also reports fixed wireless; licensed fixed wireless at 100/20 Mbps or more is reported at 35.7%1.
| Measure | Thornton | Colorado | United States | Rank among largest cities |
|---|---|---|---|---|
| Unlicensed fixed wireless | 74.8% | 56.2% | 19.7% | 56th of 343 |
| Licensed fixed wireless | 94.2% | 91.4% | 87.3% | 194th of 343 |
| Fixed wireless 100/20 | 35.7% | 61.9% | 47.9% | 282nd of 343 |
| Fixed wireless only at 100/20 | 0.2% | 6.3% | 3.6% | tied 234th of 343 |
| Licensed fixed wireless providers | 4 | 28 | 377 | tied 114th of 343 |
Source: FCC, National Broadband Map, data as of June 30, 2026. Rank 1 is the highest value. FCC file revision of November 10, 2026. Shares are of broadband serviceable locations (homes and businesses), not people.
At only 0.2% of locations does 100/20 Mbps service come by fixed wireless alone, and 0.0%1 have no ground-based 100/20 Mbps option at all.
What Thornton households subscribe to
The Census Bureau's 2025 American Community Survey counts households, not locations. It found 81.5% of Thornton households with a cable, fiber or DSL subscription (margin of error ±3.0 percentage points), 12.3% relying on a cellular data plan alone (±3.9 percentage points) and 4.4% with no internet subscription (±2.4 percentage points4). The five-year estimate for 2020 to 2024, with smaller margins, puts wired subscriptions at 84.3%5.
Thornton beside its neighbors
Among nearby cities, Thornton's fiber share is close to Aurora's and Arvada's and well below Westminster's, Denver's and Lakewood's. Westminster, also on Intrepid's network, has more than twice Thornton's share of locations with two or more fiber providers. Gigabit service varies much less from city to city.
| Area | Fiber available | Two or more fiber networks | Two or more wired choices | Gigabit (1,000/100) |
|---|---|---|---|---|
| Thornton, Colorado | 55.0% | 15.2% | 61.1% | 94.9% |
| Westminster, Colorado | 74.8% | 35.6% | 77.7% | 96.7% |
| Denver, Colorado | 76.9% | 0.5% | 78.9% | 96.0% |
| Aurora, Colorado | 52.2% | 3.5% | 59.5% | 85.3% |
| Arvada, Colorado | 50.2% | 6.1% | 62.2% | 99.7% |
| Lakewood, Colorado | 72.1% | 34.5% | 73.5% | 97.0% |
| Colorado | 59.7% | 15.2% | 57.0% | 79.4% |
| United States | 62.6% | 12.1% | 55.6% | 72.3% |
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.
The Colorado page has every county, including Adams County. Nearby city pages cover Denver, Aurora and Lakewood.
Thornton internet questions
What internet providers serve Thornton, Colorado?
Xfinity reports service at 99.7% of locations, almost all by cable. AT&T, whose Thornton fiber carries the Quantum Fiber name, reports fiber at 34.8%, and Intrepid Fiber Networks at 32.7%. CenturyLink reports DSL at 64.9%1. T-Mobile, Verizon and Rise Broadband report fixed wireless. These are FCC figures as of June 30, 2026.
Is fiber internet available in Thornton?
At 55.0% of the city's homes and businesses, as of June 30, 2026, up from 40.5%3 six months earlier and 12.8%2 in June 2022. That is still below Colorado's 59.7%1. Whether one address has fiber can be checked on the FCC map.
How many internet providers are there in Thornton?
6 wired providers report service somewhere in the city, against 22 in June 2022, and 11 if fixed wireless is included. At a single location the number is smaller: 43.4% have exactly two wired providers at 100/20 Mbps and 17.7%1 have three or more.
Is 5G home internet available in Thornton?
T-Mobile reports fixed wireless home internet at 75.2% of locations and Verizon at 63.3%, but at 100/20 Mbps or more only at 14.7% and 18.2%1. Carriers decide sign-ups address by address because a tower's capacity is shared.
Checking one address in Thornton
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, Arvada, Westminster, Greeley, Pueblo, Centennial, Boulder and Longmont. Compare Thornton 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 2020-2024 5-year detailed tables; 2020-2024; released January 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.