Area Code 817
Texas
Area code 817 serves Texas, primarily Fort Worth, in the Central Time (CT) time zone. It has served the region since 01-Jan-1953.
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 682 (Fort Worth).
With prefix utilization already at 97.8%, numbering resources here are under sustained pressure — context that explains why overlays were introduced.
In service since: 01-Jan-1953
Area Code Splits
2 area codes have been carved out of this code's original territory through geographic splits. 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 254 (Killeen), area code 940 (Denton).
Demographics & Economics
Demographic Data Unavailable for Area Code 817
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
- Central Time (CT)
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
TX
Major Cities
- Fort Worth
- Arlington
- Grand Prairie
- Flower Mound
- Mansfield
- North Richland Hills
- Euless
- Burleson
- Grapevine
- Bedford
- Haltom City
- Keller
- Hurst
- Weatherford
- Cleburne
- Southlake
- Colleyville
- Saginaw
- Benbrook
- Watauga
- Crowley
- White Settlement
- Rendon
- Forest Hill
and 60 more cities
Demographics
Detailed demographic and economic data is not yet available for area code 817.
History
Area code 817 was established in 1953 as a geographic area code. Over time, area codes area code 254 and area code 940 were split from 817. It shares its territory with area code area code 682.
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 817).
| County | Population | Share |
|---|---|---|
| Tarrant, TX | 2,230,068 | 64.5% |
| Johnson, TX | 343,827 | 9.9% |
| Parker, TX | 279,241 | 8.1% |
| Denton, TX | 140,843 | 4.1% |
| Hood, TX | 122,058 | 3.5% |
| Wise, TX | 107,495 | 3.1% |
| Ellis, TX | 88,936 | 2.6% |
| Dallas, TX | 68,031 | 2.0% |
| Somervell, TX | 54,547 | 1.6% |
| Hill, TX | 11,371 | 0.3% |
| Palo Pinto, TX | 5,615 | 0.2% |
| Jack, TX | 3,799 | 0.1% |
Area Code 817 Family Tree
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All Descendants
Area code 817 was originally assigned in 01-Jan-1953 to serve TX. Over the years, it has generated 3 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 TX, including Fort Worth and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 817.
Other Area Codes in Texas
Area codes that also serve Texas, linked for easy comparison.