Area Code 605-539 located in WOONSOCKET, SANBORN, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 539 City : WOONSOCKET County : SANBORN State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 46111 LATA (Local Access Transport Area) : 640 Rate Center : WESIGTNSPG ZIP Code Count : 43 ZIP Code Frequency : 5 ZIP Code : 57385 Other Information NPANXX : 605539 County Population : 0 Switch CLLI (Common Language Location Identifier) : WSSPSDXARS1 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : VENTURE COMMUNICATIONS COOPERATIVE OCN (Operating Company Number) : 1680 Coverage Area Name : WESSINGTON SPRINGS Latitude : 44.0795 Longitude : -98.5659 ‹ previous : 605-538 next › : 605-539 Telephone Number List 605-539-0000 ~ 605-539-9999