Area Code 206 History - Washington

Significant events for area code 206


Date
Details
1947 Original area code for all of Washington.
1956 Area code was split, with 509 covering the eastern 2/3 of the state.
January 15, 1995 Area code was split with 360 forming (a sort of) "doughnut" around the Seattle metro area. The two parts of 360 are not contiguous
April 25, 1997 A three-way split of 206, with 253 covering south of the Seattle metro area and 425 covering the area north and east