Area Code 509-240 located in WALLA WALLA, WALLA WALLA, WA, more detail is as below. Place NPA (Numbering Plan Area) : 509 NXX (Local Number Prefix) : 240 City : WALLA WALLA County : WALLA WALLA State : WA (Washington) NXX Use Type : Landline NXX Intro Version : 2002-10-25 FIPS (Federal Information Processing Standards) : 53071 LATA (Local Access Transport Area) : 676 Rate Center : WALLAWALLA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 99362 Other Information NPANXX : 509240 Switch CLLI (Common Language Location Identifier) : MLWDWAAA3MD MSA CBSA (Core Based Statistical Area) : Walla Walla, WA MSA CBSA Code (Core Based Statistical Area) : 47460 Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : NEW CINGULAR WIRELESS PCS, LLC OCN (Operating Company Number) : 6010 Coverage Area Name : WALLA WALLA Latitude : 46.0662 Longitude : -118.3347 ‹ previous : 509-239 next › : 509-241 Telephone Number List 509-240-0000 ~ 509-240-9999