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The 509 area code is highlighted in red. Area code 509 is the telephone area code in the North American Numbering Plan (NANP) for the eastern part of the U.S. state of Washington . The numbering plan area (NPA) roughly comprises the state east of the Cascade Mountains , and includes Spokane , the Tri-Cities ( Richland , Pasco , and Kennewick ), Ellensburg , Yakima , Walla Walla , and Wenatchee .
The U.S. state of Washington has six telephone area codes. The state initially used a single area code until it was divided in 1957 with the creation of area code 509 to serve Eastern Washington. In 1995, 206 was split again to serve just the Puget Sound region after area code 360 was created for the remainder of Western Washington.
Apr 4, 2024 · The 509 area code is a telephone area code in the United States that covers the eastern and central parts of Washington state. It was first established on January 1, 1957 as one of the original three area codes in the state. The 509 area code covers a large geographical area, encompassing a total of 38 counties and over 125 cities and towns.
AREA CODE 509. Area code was split from the original Washington State area code 206 on January 1, 1957. The boundary of the code roughly follows the Cascade range and all telephones to the east up to the state boundaries and established to serve Eastern Washington including Wenatchee, Tri-Cities, Spokane and surrounding regions.
Area code 509 is an area code for Washington. It was created as a split from 206 in 1957. It was created as a split from 206 in 1957. It covers the eastern portion of the state, consisting of towns such as Spokane, Ellensburg, Yakima, Walla Walla, Wenatchee, Richland, Pasco, Ephrata, Quincy and Kennewick.
Map of Washington's area codes. The 509 area code is highlighted in red. When the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan for Operator Toll Dialing in 1947, the state of Washington was designated as a single numbering plan area and area code 206 as assigned as one of the 86 original North American area codes.
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- 1957: Area code 509 was created from a split of area code 206. - 2021: Area code 509 transitioned to ten-digit dialing following the designation of 988 as a dialing code for the National Suicide Prevention Lifeline.
