Area codes 717 and 223 are the telephonic area codes, which include serving South Central Pennsylvania and the Susquehanna Valley and also covers the Harrisburg, Lancaster, and York metropolitan areas. Also, it consists of the area which is commonly known as the Pennsylvania Dutch Country, which in turn covers the city of around two million people.
The area code 717 was one of the central and original area code, which was created in the year 1947. It initially covers the eastern part of the state with the exception of the Delaware and Lehigh valleys and area code of this area was 215. It was extended from the Maryland border to the south to the New York and New Jersey borders.
Area code 717 is one of the primary and original area code, which was established, by AT&T and the Bell System in 1947. Area code 570 was created as an overlay area code of 717. Area code 223 was also created as an overlay area code of 717 in the year 2017. Presently the largest city the area code 717 serves is Lancaster.
Regardless of the presence of the five cities which are Harrisburg, Lancaster, York, Scranton, and Wilkes-Barre from the state’s biggest 15 cities this region of Pennsylvania is not having as less population as the Delaware and Lehigh Valley which results in keeping area code 717 unchanged for almost 41 years. This was the largest numbering plan area on the eastern seaboard at that time. It was extended in the east in around 1994 which was a part of the spilled of area code 215 of the Philadelphia when some of the towns in eastern Lancaster County and western Chester county which were slated to transfer to an area code 610 which were instead shifted to 717.
By the mid-1990s area code, 717 ended due to the proliferation of cell phones, fax machines, and pagers especially in Harrisburg, Lancaster, York, and Scranton. Around in December 1998, the northern part of the old area code 717 territories received an area code 570, which was centered on Scranton, Wilkes-Barre, and Williamsport.
In 2010, the Pennsylvania utility commission resolved that area code 717 is likely to end after some time around in the year 2018. Taking into account overlaying 717 with an area code or to split it into an east-west boundary because an overlay needs ten-digit dialing and area code 717 would have been able to do that.
In October 2016 an overlay, code 223 was created and come into existence in the year 2017. From August 2017, ten-digit dialing is necessary for everyone.
Area code 717 and area code 223 is serving many parts of sixteen counties in Pennsylvania.