Area Code 801
Utah
Area code 801 serves Utah, primarily Salt Lake City, in the Mountain Time (MT) time zone. It has served the region since 01-Jan-1947.
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 385 (Salt Lake City).
With prefix utilization already at 97.9%, numbering resources here are under sustained pressure — context that explains why overlays were introduced.
In service since: 01-Jan-1947
Area Code Splits
One area code has been carved out of this code's original territory through a geographic split. Each split was a relief action: as demand grew, part of the region was reassigned to a new code rather than overlaying the whole territory.
Split into: area code 435 (St. George).
Demographics & Economics
Demographic Data Unavailable for Area Code 801
County-level demographic data is not available for this area code because NPA boundary polygons are not publicly distributed by NANPA. We use geographic boundary data from the Colorado Open Data Portal to map area codes to counties, which currently covers 194 of 376 geographic area codes.
Demographic statistics (population, income, education, poverty) require county-level aggregations from Census ACS data. Without a county mapping, these aggregations cannot be computed. We are actively seeking additional data sources to improve coverage.
Statistics are population-weighted aggregations from Census ACS 5-year estimates where county boundary data is available.See Sources for details.
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
UT
Major Cities
- Salt Lake City
- West Valley City
- West Jordan
- Provo
- Orem
- Sandy
- Ogden
- Layton
- Lehi
- South Jordan
- Millcreek
- Taylorsville
- Herriman
- Draper
- Murray
- Eagle Mountain
- Bountiful
- Riverton
- Saratoga Springs
- Spanish Fork
- Roy
- Pleasant Grove
- Midvale
- Springville
and 74 more cities
Demographics
Detailed demographic and economic data is not yet available for area code 801.
History
Area code 801 is one of the original area codes established in 1947 when the North American Numbering Plan (NANP) was created. Over time, area code area code 435 was split from 801. It shares its territory with area code area code 385.
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 801).
| County | Population | Share |
|---|---|---|
| Salt Lake, UT | 1,188,010 | 44.8% |
| Utah, UT | 730,100 | 27.5% |
| Davis, UT | 402,973 | 15.2% |
| Weber, UT | 274,577 | 10.4% |
| Wasatch, UT | 43,749 | 1.6% |
| Morgan, UT | 12,585 | 0.5% |
Area Code 801 Family Tree
Hover over nodes to see details. Click to navigate to individual area code pages. Use scroll to zoom, drag to pan.
Area code 801 was originally assigned in 01-Jan-1947 to serve UT. Over the years, it has generated 2 descendant area codes through a combination of geographic splits and overlays as demand for telephone numbers grew.
Call Context
This area code covers a geographic region across UT, including Salt Lake City and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 801.
Other Area Codes in Utah
Area codes that also serve Utah, linked for easy comparison.