Find any 717- phone number in Pennsylvania
# Pennsylvania Area Code 717
## Overview of Area Code 717
Area code 717 is one of Pennsylvania's original area codes, established in 1947 as part of the North American Numbering Plan (NANP). This area code covers south-central Pennsylvania, including major cities such as Lancaster, Harrisburg (the state capital), and York. The 717 region is known for its rich history, diverse communities, and significant Amish and Mennonite populations, particularly in Lancaster County. The area code serves both urban and rural communities across a geographic region that has maintained relatively stable boundaries compared to other heavily populated areas in the United States.
## The North American Numbering Plan System
The North American Numbering Plan is a standardized system for assigning telephone numbers across the United States, Canada, and several Caribbean nations. Area codes like 717 are the first three digits of a ten-digit phone number and serve as geographic identifiers that help route calls to the correct region. The NANP was designed to facilitate automatic dialing and has been managed by various telecommunications regulatory bodies since its inception. As telecommunications technology has evolved and population patterns have changed, new area codes have been created through a process called "area code splitting," though 717 has remained relatively unchanged, reflecting the steady rather than explosive growth patterns in south-central Pennsylvania.