Area Code 509-422 located in OKANOGAN, OKANOGAN, WA, more detail is as below. Place NPA (Numbering Plan Area) : 509 NXX (Local Number Prefix) : 422 City : OKANOGAN County : OKANOGAN State : WA (Washington) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 53047 LATA (Local Access Transport Area) : 676 Rate Center : OMAK ZIP Code Count : 1693 ZIP Code Frequency : 92 ZIP Code : 98840 Other Information NPANXX : 509422 Switch CLLI (Common Language Location Identifier) : OMAKWA01DS0 Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : QWEST CORPORATION OCN (Operating Company Number) : 9638 Coverage Area Name : OMAK Latitude : 48.4072 Longitude : -119.5253 ‹ previous : 509-422 next › : 509-423 Telephone Number List 509-422-0000 ~ 509-422-9999