Area Code 509-996 located in WINTHROP, OKANOGAN, WA, more detail is as below. Place NPA (Numbering Plan Area) : 509 NXX (Local Number Prefix) : 996 City : WINTHROP 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 : WINTHROP ZIP Code Count : 1411 ZIP Code Frequency : 89 ZIP Code : 98862 Other Information NPANXX : 509996 Switch CLLI (Common Language Location Identifier) : WNTHWAXARS0 Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK OCN (Operating Company Number) : 2408 Coverage Area Name : WINTHROP Latitude : 48.4786 Longitude : -120.1381 ‹ previous : 509-996 next › : 509-997 Telephone Number List 509-996-0000 ~ 509-996-9999