─────── § 04. NPA RECORD · 509 · FOLIO 0311 OF 0801 ──────────────
509
United States NPA Record
Area code for eastern Washington, created in 1957 when the original 206 area was split.
Area code for eastern Washington, created in 1957 when the original 206 area was split.
IN SERVICEFirst record · 1956
§ 04.05Event Summary
split · 2jeopardy · 1mandatory dialing · 1permissive dialing · 1
§ 04.06
Documentary Record · 5 events
CHRONOLOGICAL ORDER
1956-01-01
split
NPA 509 assigned to eastern Washington
Area code 509 was assigned in 1956 when it was split from area code 206, covering the eastern part of Washington state including Spokane and the Tri-Cities.
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1957-01-01
split
NPA 509 split from 206
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2021-04-24
permissive dialing
Permissive 10-digit dialing begins in NPA 509
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2021-10-24
mandatory dialing
Mandatory 10-digit dialing in NPA 509
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2026-01-01
jeopardy
Projected exhaustion of NPA 509
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