Area code
Area code 983 — Denver, CO
Colorado · in service since June 17, 2022
Area code 983 covers the Denver, CO area. It is an overlay: 303, 720 serve the same area, so neighbors can have different area codes.
Local time in Denver
Spam reports from Sep 23 – Oct 22, 2026
Low #360 of 461 codes
144 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneMountain Time
- Local calls10 digits
- Prefixes62 assigned
- Runs out~2Q 2069
- Unwanted call?Block & report
Spam call reports about 983 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 8 |
| Sep 14 | 38 |
| Sep 21 | 29 |
| Sep 28 | 42 |
| Oct 5 | 48 |
| Oct 12 | 20 |
| Oct 19 (4 days) | 12 |
Compared with all codes
- Robocalls
- 67%all codes 75%
- Callers with the same code
- 3%all codes 35%
- Rank by complaints
- #360of 461 · bottom quarter
- FCC complaints, Oct 2025 – Sep 2026
- 331 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Reducing your debt (credit cards, mortgage, student loans) | 64 32% | |
| Dropped call or no message | 18 9% | |
| Home improvement & cleaning | 10 5% | |
| Calls pretending to be government, businesses, or family and friends | 7 4% | |
| Medical & prescriptions | 4 2% | |
| Vacation & timeshares | 3 2% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| Colorado | 56 28% | |
| California | 14 7% | |
| Texas | 11 6% | |
| Florida | 10 5% | |
| New York | 10 5% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 983 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| DENVER | Denver | Denver County | 33 |
| LONGMONT | Longmont | spans 2 counties | 7 |
| FORTLUPTON | Fort Lupton | Weld County | 3 |
| STRASBURG | Strasburg | spans 2 counties | 2 |
| DECKERS | — | — | 1 |
| KEENESBURG | Keenesburg | Weld County | 1 |
| ROGGEN | — | — | 1 |
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- Colorado
- Assigned by NANPA
- May 27, 2021
- Local dialing
- 10 digits (NANPA: 10D)
- NANPA planning letters
- PL-563
Source: NANPA, NPA database of Oct 24, 2026.
Is 983 running out of numbers?
Previous forecast (October 2025): 2071, moved earlier by 2 years.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 983 prefixes
The five largest of 21 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Onvoy, LLC | 13 21% | |
| Multiple Ocn Listing | 9 15% | |
| Wide Voice, LLC | 7 11% | |
| 5 8% | ||
| New Cingular Wireless PCS, LLC | 4 6% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 983
What area code is 983?
A Colorado area code, in service since June 17, 2022.
Where is 983 area code, and what time zone is it in?
Denver, CO; Mountain Time.
Why am I getting spam calls from 983?
144 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).
Will 983 get a new area code?
NANPA forecasts exhaust in 2Q 2069; no relief planning listed.