Located in the Pacific (GMT -08:00) time zone. Area code 971 serves the state of Oregon. This area code was assigned on May 1st, 1999. On October 1st, 2000 it went into service. 971 is a General Purpose Code. 971 service area does overlap with 503 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.