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717 was one of the original area codes established in 1947. It originally covered the eastern half of the state except for the Delaware and Lehigh valleys. It stretched from the Maryland border to the south to the New York and New Jersey borders, making it the largest of Pennsylvania's original four area codes and the second-largest east of the Mississippi River that didn't cover an entire state (behind Michigan's 616). The 717 area code was split on December 5, 1998, when the northern portion (centered on Scranton, Wilkes-Barre and Williamsport) became area code 570.
As of May 2005, the subscriber number pool of the 717 area code was allocated by 52%, with 48% still unassigned. On July 1, 2009, the North American Numbering Plan Administration reported that the 717 area code would be exhausted by late 2013. The recommendation is to overlay 717 with a yet-to-be-assigned area code, although a split has not been ruled out.
The 717 area code serves parts of sixteen counties in Pennsylvania.
|Pennsylvania area codes: 215, 267, 412, 484, 570, 610, 717, 724, 814, 878|
|West: 814||area code 717||East: 610/484|
|South: 301/240, 410/443|
|Maryland area codes: 240/301, 410/443/667|