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Washington is currently using five area codes. Washington currently has one area code which is assigned to provide numbering
relief but is not yet in service.
Washington originally had one area code, 206, when the numbering system was established in 1947. By 1957 Washington experienced sufficient growth in population and
telephone use to need an additional area code. To meet this increase in demand area code 206 was split in 1957 to form area code 509. It was thirty-eight years later in 1995 before the demand for new numbers
in Washington required a second split of area code 206 to form area code 360. In 1997 two additional area codes 253 and 425 were created.
Changes and History of Washington Area Codes:
01/01/1947
Area code 206 was put into service. In 1957 area code 206 was split to form area code 509. In 1995 area code 206 was split to form area code 360. In 1997 area code 206 was split to form area codes 253
and 425.
01/01/1957
Area code 509 was put into service. Area code 509 was created from a split of area code 206.
01/15/1995
Area code 360 was put into service. Area code 360 was created
from a split of area code 206.
04/27/1997
Area code 253 was put into service. Area code 253 was created from a split of area code 206.
04/27/1997
Area code 425 was put into service. Area
code 425 was created from a split of area code 206.
not in service
Area code 564 is proposed as an overlay for area code 360 but is not yet in service and it's status is considered suspended. |
