Area Code 509-557 located in OMAK, OKANOGAN, WA, more detail is as below. Place NPA (Numbering Plan Area) : 509 NXX (Local Number Prefix) : 557 City : OMAK County : OKANOGAN State : WA (Washington) NXX Use Type : Landline NXX Intro Version : 2002-10-25 FIPS (Federal Information Processing Standards) : 53047 LATA (Local Access Transport Area) : 676 Rate Center : OMAK ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 98841 Other Information NPANXX : 509557 Switch CLLI (Common Language Location Identifier) : YAKMWAWE5MD Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : LEVEL 3 COMMUNICATIONS, LLC - WA OCN (Operating Company Number) : 6121 Coverage Area Name : OMAK Latitude : 48.4077 Longitude : -119.5322 ‹ previous : 509-556 next › : 509-559 Telephone Number List 509-557-0000 ~ 509-557-9999