Area Code 717
Pennsylvania
Area code 717 serves Pennsylvania, primarily Lancaster, in the Eastern Time (ET) time zone. It has served the region since 01-Jan-1947.
Overlay Area Code
This area code is part of an overlay region, meaning the same geographic area is served by multiple area codes. Overlay codes were introduced to meet growing demand for phone numbers without requiring existing customers to change their numbers.
This area code shares its geographic region with: area code 223 (Lancaster).
In service since: 01-Jan-1947
Area Code Splits
Parts of this area code’s original geographic region were later assigned new area codes through splits. When a split occurs, some customers in the original area code region are assigned the new area code.
Split into: area code 570 (Scranton).
Demographics & Economics
Demographic Data Unavailable for Area Code 717
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
- Eastern Time (ET)
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
PA
Major Cities
- Lancaster
- Harrisburg
- York
- Lebanon
- Chambersburg
- Carlisle
- Colonial Park
- Hanover
- Weigelstown
- Hershey
- Ephrata
- Elizabethtown
- Progress
- Waynesboro
- Shiloh
- Columbia
- Willow Street
- Lititz
- Middletown
- Mechanicsburg
- East York
- Millersville
- Lewistown
- Parkville
and 270 more cities
Demographics
Detailed demographic and economic data is not yet available for area code 717.
History
Area code 717 is one of the original area codes established in 1947 when the North American Numbering Plan (NANP) was created. It shares its territory with area code area code 223.
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 717).
| County | Population | Share |
|---|---|---|
| York, PA | 569,817 | 22.1% |
| Lancaster, PA | 561,300 | 21.8% |
| Dauphin, PA | 350,510 | 13.6% |
| Cumberland, PA | 317,254 | 12.3% |
| Lebanon, PA | 189,821 | 7.4% |
| Adams, PA | 184,642 | 7.2% |
| Franklin, PA | 179,992 | 7.0% |
| Perry, PA | 50,344 | 2.0% |
| Mifflin, PA | 46,482 | 1.8% |
| Berks, PA | 41,346 | 1.6% |
| Juniata, PA | 30,064 | 1.2% |
| Fulton, PA | 22,563 | 0.9% |
| Snyder, PA | 14,069 | 0.5% |
| Chester, PA | 13,173 | 0.5% |
| Schuylkill, PA | 4,299 | 0.2% |
| Huntingdon, PA | 1,008 | 0.0% |
Area Code 717 Family Tree
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All Descendants
Area code 717 was originally assigned in 01-Jan-1947 to serve PA. 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 PA, including Lancaster and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 717.
Other Area Codes in Pennsylvania
Area codes that also serve Pennsylvania, linked for easy comparison.