Located in the Eastern (GMT -05:00) time zone. Area code 646 serves the state of New York. This area code was assigned on May 7th, 1999. On July 1st, 1999 it went into service. 646 is a General Purpose Code. 646 service area does overlap with 212 332 917 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.