Area Code 206-578 located in SEATTLE, KING, WA, more detail is as below. Place NPA (Numbering Plan Area) : 206 NXX (Local Number Prefix) : 578 City : SEATTLE County : KING State : WA (Washington) NXX Use Type : Landline NXX Intro Version : 2000-08-20 FIPS (Federal Information Processing Standards) : 53033 LATA (Local Access Transport Area) : 674 Rate Center : DES MOINES ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 98188 Other Information NPANXX : 206578 County Population : 0 Switch CLLI (Common Language Location Identifier) : STTLWAKGDS0 MSA CBSA (Core Based Statistical Area) : Seattle-Tacoma-Bellevue, WA MSA CBSA Code (Core Based Statistical Area) : 42660 Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : INTERNATIONAL TELCOM, LTD. - WA OCN (Operating Company Number) : 7485 Coverage Area Name : SEATTLE Latitude : 47.6100 Longitude : -122.3312 ‹ previous : 206-577 next › : 206-579 Telephone Number List 206-578-0000 ~ 206-578-9999