Area Code 605-245 located in FORT THOMPSON, BUFFALO, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 245 City : FORT THOMPSON County : BUFFALO State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 46017 LATA (Local Access Transport Area) : 640 Rate Center : FTTHOMPSON ZIP Code Count : 303 ZIP Code Frequency : 93 ZIP Code : 57339 Other Information NPANXX : 605245 County Population : 0 Switch CLLI (Common Language Location Identifier) : FTTHSDXADS1 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : MIDSTATE COMMUNICATIONS, INC. OCN (Operating Company Number) : 1670 Coverage Area Name : LOWER BRULE Latitude : 44.0546 Longitude : -99.4374 ‹ previous : 605-245 next › : 605-246 Telephone Number List 605-245-0000 ~ 605-245-9999