Area Code 605-477 located in STEPHAN, HYDE, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 477 City : STEPHAN County : HYDE State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 6/17/2009 FIPS (Federal Information Processing Standards) : 46069 LATA (Local Access Transport Area) : 640 Rate Center : FTTHOMPSON ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 57346 Other Information NPANXX : 605477 County Population : 0 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : NATIVE AMERICAN TELECOM, LLC - SD OCN (Operating Company Number) : 424F Coverage Area Name : FORT THOMPSON Latitude : 44.0751 Longitude : -99.4405 ‹ previous : 605-475 next › : 605-478 Telephone Number List 605-477-0000 ~ 605-477-9999