Located in the Eastern (GMT -05:00) time zone. Area code 838 serves the state of New York. This area code was assigned on September 16th, 2016. On September 19th, 2017 it went into service. 838 is a General Purpose Code. 838 service area does overlap with 518 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.