Located in the Eastern (GMT -05:00) time zone. Area code 215 serves the state of Pennsylvania. This area code was assigned on January 1st, 1947. On January 1st, 1947 it went into service. 215 is a General Purpose Code. 215 service area does overlap with 267 445 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D. All calls within and between the 215 and 267 and 484 and 610 NPAs can be dialed as 10D or 1+10D. Calls to other NPAs must be dialed as 1+10D.