509 Area Code: Spokane, Washington

Eastern Washington is served by the 509 area code, with Spokane as the primary city. Spokane sits along the Spokane River in eastern Washington, organized around a downtown core, several university campuses (Gonzaga, Eastern Washington, and Whitworth), and a long-running role as the regional commercial center for the Inland Northwest — a substantial geographic stretch that takes in eastern Washington, northern Idaho, and parts of western Montana. The 509 footprint extends through Yakima, the Tri-Cities (Kennewick, Pasco, Richland), Walla Walla, and the surrounding cluster of communities spread across eastern Washington.

In records the directory has compiled for 509 numbers, other Washington cities — Bellevue, Seattle, Tacoma, and Vancouver — recur frequently. None of those are inside the 509 footprint. The pattern reflects standard public-record dynamics, with phone numbers porting across Washington and addresses linked across multiple cities. The directory currently documents 559 distinct prefixes within 509 in detail, a working subset of the prefix population the code carries.

Spokane's home values come in close to the US median, with median household income running below the national figure. The city's median age sits close to the US reading, and population places Spokane as the second-largest city in Washington — substantial enough to anchor a regional economy organized around the universities, healthcare, and the surrounding agricultural and natural-resource counties of the Inland Northwest.