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Public FCC data
Do people in Colorado report more spam calls than most states? They filed 6,602 FCC complaints in 12 months, the most per person.
From October 2025 to September 2026, people in Colorado filed 6,602 unwanted-call complaints with the FCC, or 109.8 for every 100,000 residents, the highest rate among the 50 states and DC. More than half of the complaints that gave a caller ID (2,184 of 4,143) named one area code, 303 (Denver and Boulder, Colorado).
- 6,602unwanted-call complaints filed with the FCC by people in Colorado, October 2025 to September 2026
- 109.8complaints for every 100,000 residents, first of 51 (the whole country: 36.6)
- 303the area code people there named most, on 2,184 complaints (Denver and Boulder, Colorado)
Source: Federal Communications Commission, CGB - Consumer Complaints Data (dataset 3xyp-aqkj), issue "Unwanted Calls", read on November 4, 2026. Population: U.S. Census Bureau, Vintage 2025. All sources.
People in Colorado reported area code 303 most, and 4 of the 10 busiest area codes are in Colorado.
Each row counts the complaints from people in Colorado whose caller ID started with that code. 6 codes in the list are toll-free and belong to no place. Together these 10 codes account for 3,111 of the 4,143 complaints that gave a caller ID.
| Rank | Code | Where it is | In Colorado? | Complaints |
|---|---|---|---|---|
| 1 | 303 | Denver and BoulderIn Colorado | Yes | 2,184 |
| 2 | 720 | DenverIn Colorado | Yes | 248 |
| 3 | 970 | Northern and western ColoradoIn Colorado | Yes | 236 |
| 4 | 719 | Colorado Springs and PuebloIn Colorado | Yes | 159 |
| 5 | 833 | Toll-free, tied to no placeNo place | No place | 61 |
| 6 | 855 | Toll-free, tied to no placeNo place | No place | 52 |
| 7 | 844 | Toll-free, tied to no placeNo place | No place | 49 |
| 8 | 877 | Toll-free, tied to no placeNo place | No place | 46 |
| 9 | 866 | Toll-free, tied to no placeNo place | No place | 42 |
| 10 | 888 | Toll-free, tied to no placeNo place | No place | 34 |
Monthly complaints from Colorado rose from 320 in February to 1,067 in July.
October 2025 and November 2025 are shaded and dotted because the FCC file holds only 323 and 16,267 complaints of any kind in those months, against about 29,400 in a usual one.
Complaints from Colorado by month
Unwanted-call complaints filed from Colorado per month, October 2025 to September 2026.
- Complaints filed from Colorado
- Months the FCC file is thin
| Month | All complaints |
|---|---|
| October 2025 | 0 |
| November 2025 | 249 |
| December 2025 | 385 |
| January 2026 | 366 |
| February 2026 | 320 |
| March 2026 | 606 |
| April 2026 | 759 |
| May 2026 | 703 |
| June 2026 | 828 |
| July 2026 | 1,067 |
| August 2026 | 630 |
| September 2026 | 689 |
Prerecorded calls make up 57% of the complaints from Colorado, above the 41% across the country.
The FCC files robocalls, live callers and texts under one issue, "Unwanted Calls". The bar shows how the 6,602 complaints from Colorado split by what the person says reached them.
What reached people in Colorado
How the 6,602 complaints from Colorado split.
- Prerecorded call57% · 3,796 complaints
- Live caller24% · 1,577 complaints
- Text message12% · 801 complaints
- Kind not stated6% · 428 complaints
Across the country the split is prerecorded call 41%, live caller 26%, text message 15%, kind not stated 17%.
Most of the US numbers people in Colorado reported carry a Colorado area code, 2,842 of 3,808 (75%), against 50% across the country.
Of 4,143 complaints that gave a caller ID, 2,842 named a Colorado code, 966 a code from another state, 300 a toll-free code and 35 something else, such as a special-use code, a number abroad or a prefix that is not assigned.
Where the numbers people in Colorado reported came from
Where the 4,143 caller ID numbers from Colorado came from.
- Colorado area codes69% · 2,842 complaints
- Other states' area codes23% · 966 complaints
- Toll-free codes7% · 300 complaints
- Other or not assigned1% · 35 complaints
After Colorado, people there named California, Florida and New York codes most.
Colorado ranks first of 51 for complaints per 100,000 people, just ahead of the District of Columbia.
Colorado leads the list at 109.8 and North Dakota is last at 13.8. The 50 states and DC together file 36.6.
Colorado next to the states ranked around it
Complaints for every 100,000 residents, the states ranked next to Colorado.
Here is what to do when a spam call reaches you in Colorado.
See why so many calls reach you
Quote forms, data brokers, leaked databases and recycled numbers are the routes callers use to find a number.
Check one number that called you
Paste it into the spam number lookup to see its line type, its carrier and a risk level.
Get a number with a Colorado area code
Each of these area codes of Colorado has a page that shows how to get a number in it that rings the phone you already carry.
These are the questions people ask about spam calls in Colorado, answered from the data.
6,602 unwanted-call complaints from October 2025 to September 2026, which is 109.8 for every 100,000 residents. That ranks first among the 50 states and DC per person and fourth by total count.
303 (Denver and Boulder, Colorado) was named on 2,184 complaints, 53% of the complaints that gave a caller ID number. Next were 720 (Denver, Colorado) with 248 and 970 (Northern and western Colorado) with 236.
Mostly. 75% of the complaints that named a US area code carried a Colorado code, against 50% across the country. After Colorado, the area codes named most belonged to California (94), Florida (94) and New York (74). Caller ID can be faked, so a code shows what appeared on the phone, not where the caller was.
57% were about prerecorded calls, 24% about a live caller and 12% about text messages, and 6% did not say. Across the country the split is 41%, 26% and 15%.
Yes. People in Colorado filed 2,386 complaints in July to September 2026, 85% more than the 1,292 in January to March 2026. For the whole country the change over the same months was up 28%.
File a complaint with the FCC's Consumer Help Center at consumercomplaints.fcc.gov. Complaints filed there are the ones counted on this page, listed by the state of the person who filed. To report a scam or fraud call, use ReportFraud.ftc.gov.
A state with more people files more complaints just by being bigger. Dividing by the Census Bureau's July 1, 2025 estimate for Colorado (6,012,561 residents) puts every state on one scale, which is why Colorado ranks first per person and fourth by total count.
Every number on this page comes from two public sources.
The complaints come from the FCC.
Federal Communications Commission, CGB - Consumer Complaints Data (dataset 3xyp-aqkj), issue "Unwanted Calls", filed October 1, 2025 to September 30, 2026, read from opendata.fcc.gov on November 4, 2026.
The population comes from the Census Bureau.
U.S. Census Bureau, Population Division, Annual Estimates of the Resident Population for the United States, Regions, States, District of Columbia, and Puerto Rico: April 1, 2020 to July 1, 2025 (NST-EST2025-POP), Vintage 2025 estimate for July 1, 2025, released January 2026, checked November 2026.
Data: FCC Consumer Complaints, Oct 2025 to Sep 2026, analysed by ExpressNumber. www.expressnumber.com/spam-calls-by-state/colorado
See every state ranked
All 50 states and DC by complaints per 100,000 people, with Colorado marked.
See which area codes send the most
The 25 busiest local area codes, the toll-free codes and a search of every code in the data.
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