Area code 509
telephone area code for the eastern two-thirds of Washington From Wikipedia, the free encyclopedia
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Area code 509 is an area code for Washington. 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.
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