Area Code 605-546 located in DE SMET, KINGSBURY, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 546 City : DE SMET County : KINGSBURY State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 46077 LATA (Local Access Transport Area) : 640 Rate Center : IROQUOIS ZIP Code Count : 7 ZIP Code Frequency : 2 ZIP Code : 57231 Other Information NPANXX : 605546 County Population : 0 Switch CLLI (Common Language Location Identifier) : IRQSSDCORS1 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : QWEST CORPORATION OCN (Operating Company Number) : 9631 Coverage Area Name : IROQUOIS Latitude : 44.3658 Longitude : -97.8521 ‹ previous : 605-545 next › : 605-546 Telephone Number List 605-546-0000 ~ 605-546-9999