Area Code 605-236 located in PLANKINTON, AURORA, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 236 City : PLANKINTON County : AURORA State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 46003 LATA (Local Access Transport Area) : 640 Rate Center : MT VERNON ZIP Code Count : 23 ZIP Code Frequency : 6 ZIP Code : 57368 Other Information NPANXX : 605236 County Population : 0 Switch CLLI (Common Language Location Identifier) : MTVRSDXA23G Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : SANTEL COMMUNICATIONS COOPERATIVE, INC.-SD OCN (Operating Company Number) : 1676 Coverage Area Name : MOUNT VERNON Latitude : 43.7152 Longitude : -98.2556 ‹ previous : 605-235 next › : 605-236 Telephone Number List 605-236-0000 ~ 605-236-9999