Located in the Eastern (GMT -05:00) time zone. Area code 917 serves the state of New York. This area code was assigned on January 1st, 1992. On January 1st, 1992 it went into service. 917 is a General Purpose Code. 917 service area does overlap with 212 332 646 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.