Pennsylvania area code 570, covering towns and cities such as Carbondale, Mountain Top, Plymouth, Scranton or Wilkes-Barre will be overlaid by the new area code 272 starting October 21, 2013. The new area code will cover the same area currently served by area code 570.
The use of two area codes in this northern part of Pennsylvania will result in mandatory 10 digit dialing for all instate, including local calls. There is a permissive 10 digit dialing period currently in place for 570 local calls (March 21 to September 21), during which both 7 and 10 digit dialing are permitted. From September 21 to October 21, 10 digit dialing for all calls within the 570 area code becomes mandatory. Starting October 21, the new 272 NPA becomes active.
See official announcement (PDF document)