Philadelphia could have a brand new space code beginning March third, 2018. The brand new 445 space code was accepted on November 9, 2016 by the Pennsylvania Public Utility Fee and can serve the identical geographic space presently served by overlay advanced 215/267 – the town of Philadelphia, PA. 10 digit dialing is already used to dial native calls inside the overlay advanced’ present boundaries.
See official NANPA announcement and map of the old/new NPA (PDF doc).
Go to area code 445 web page for an inventory of cities served, map and different data.