Area Code 605-620 located in LAKE PRESTON, KINGSBURY, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 620 City : LAKE PRESTON County : KINGSBURY State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 2/6/2007 FIPS (Federal Information Processing Standards) : 46077 LATA (Local Access Transport Area) : 640 Rate Center : LK PRESTON ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 57249 Other Information NPANXX : 605620 County Population : 0 Switch CLLI (Common Language Location Identifier) : SXFLSDCOXSX Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : SPRINT COMMUNICATIONS COMPANY, L.P. - SD OCN (Operating Company Number) : 8940 Coverage Area Name : LAKE PRESTON Latitude : 44.3694 Longitude : -97.3759 ‹ previous : 605-613 next › : 605-622 Telephone Number List 605-620-0000 ~ 605-620-9999