Located in the Pacific (GMT -08:00) time zone. Area code 458 serves the state of Oregon. This area code was assigned on October 21st, 2008. On February 10th, 2010 it went into service. 458 is a General Purpose Code. 458 service area does overlap with 541 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.