Area Code 983
Colorado
Area code 983 serves Colorado, primarily Denver, in the Mountain Time (MT) time zone. It is an overlay area code sharing territory with area code 303.
Published: Verified against NANPA and FCC records
Overlay Area Code
This area code shares its geographic footprint with an overlay code, so the same cities are served by two area codes. Because overlays leave existing numbers untouched, this region's relief planning favors adding codes over redrawing boundaries.
The codes serving this same region: area code 303 (Denver).
In service since: 17-Jun-2022
Demographics & Economics
- Total Population
- 5,264,773
- Population Density
- 302 people/sq miabove U.S. average (U.S.: 95 people/sq mi)
- Median Household Income
- $101,087above U.S. median (U.S.: $80,734)
- Poverty Rate
- 8.7%below U.S. average (U.S.: 12.5%)
- Unemployment Rate
- 4.5%below U.S. average (U.S.: 5.2%)
- Education Attainment
- Bachelor's Degree+49.6%above U.S. average (U.S.: 35.7%)High School or Lower21.3%
Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.
See how this area code compares to all US area codes in the income ranking and density ranking.
Time Zone
- Mountain Time (MT)
NANPA Relief Status
According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.
Source: NANPA NPA Relief Planning Reports · See all relief planning statuses
Current Time
Prefix Utilization
Geographic Coverage
State
CO
Major Cities
- Denver
- Aurora
- Lakewood
- Thornton
- Arvada
- Westminster
- Centennial
- Boulder
- Highlands Ranch
- Longmont
- Castle Rock
- Broomfield
- Parker
- Littleton
- Brighton
- Northglenn
- Dakota Ridge
- Englewood
- Ken Caryl
- Wheat Ridge
- Erie
- Lafayette
- Columbine
- Four Square Mile
and 120 more cities
History
Area code 983 serves as an overlay for the same territory as area code 303. It was introduced in 2022 to provide additional phone number capacity for the region. It shares its territory with area codes area code 303 and area code 720.
Demographics
The estimated population served by area code 983 is approximately 5,264,773. The population density is 302 people per square mile, which is higher than the national average of 95. The median household income is $101,087, which is higher than the national median of $80,734. Approximately 49.6% of adults hold a bachelor's degree or higher, compared to the national rate of 35.7%. This rate is higher than the national average. The poverty rate stands at 8.7%, which is lower than the national rate of 12.5%.
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 983).
| County | Population | Share |
|---|---|---|
| Denver, CO | 1,044,485 | 19.8% |
| Arapahoe, CO | 989,106 | 18.8% |
| Adams, CO | 854,477 | 16.2% |
| Jefferson, CO | 762,712 | 14.5% |
| Douglas, CO | 502,657 | 9.5% |
| Boulder, CO | 458,086 | 8.7% |
| Broomfield, CO | 214,846 | 4.1% |
| Weld, CO | 193,758 | 3.7% |
| Larimer, CO | 102,131 | 1.9% |
| Elbert, CO | 65,901 | 1.3% |
| Clear Creek, CO | 30,425 | 0.6% |
| Gilpin, CO | 29,241 | 0.6% |
| Park, CO | 12,498 | 0.2% |
| El Paso, CO | 4,450 | 0.1% |
Area Code 983 Family Tree
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Area code 983 was originally assigned in 17-Jun-2022 to serve CO.
Call Context
This area code covers a geographic region across CO, including Denver and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 983.
Other Area Codes in Colorado
Area codes that also serve Colorado, linked for easy comparison.