<P> North American area code 509 is the telephone area code for the eastern two - thirds of Washington . The western boundary of 509 roughly follows the Cascades . The 509 area includes Spokane , the Tri-Cities ( Richland , Pasco , and Kennewick ) , Ellensburg , Yakima , Walla Walla , and Wenatchee . The 509 code was created in a split from 206 , originally the area code for all of Washington , in a flash - cut on January 1 , 1957 . </P>
<P> North American area code 509 is the telephone area code for the eastern two - thirds of Washington . The western boundary of 509 roughly follows the Cascades . The 509 area includes Spokane , the Tri-Cities ( Richland , Pasco , and Kennewick ) , Ellensburg , Yakima , Walla Walla , and Wenatchee . The 509 code was created in a split from 206 , originally the area code for all of Washington , in a flash - cut on January 1 , 1957 . </P>
where is area code 509 located in usa
where is area code 509 located in usa
the eastern two - thirds of Washington
the eastern two - thirds of Washington