List of Pennsylvania area codes
This is a list of telephone area codes in the state of Pennsylvania.
215: The city of Philadelphia and its immediately surrounding areas in the southeast corner of Pennsylvania directly to its north
412: The city of Pittsburgh and its immediately surrounding areas in Allegheny County
484: An overlay of 610
570: Northeastern Pennsylvania, including Scranton and Wilkes-Barre.
582: Northwestern Pennsylvania, to be split from 814 in 2012.
610: Southeastern Pennsylvania outside Philadelphia, including the Lehigh Valley, but excluding all but northernmost Bucks County and the eastern half of Montgomery County
717: South Central Pennsylvania, including Harrisburg, Lancaster, and York.
724: Southwestern Pennsylvania outside Pittsburgh and Allegheny County (except for outermost areas, such as Wexford, Gibsonia, Tarentum, parts of Monroeville, and parts of southern AC); completely surrounds 412
814: Northwestern and central Pennsylvania, from Bedford County to Centre County extending to the shores of Lake Erie, and including the city of Erie
878: An overlay of 412 and 724.
The original four area codes for Pennsylvania in 1947 were 215, 412, 717, and 814. 610 was added in 1995, and several other splits and overlays have occurred since then. Area code 835 is planned as an additional overlay to 610.