Area Code 605-346 located in FREDERICK, BROWN, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 346 City : FREDERICK County : BROWN State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 1996-01-10 FIPS (Federal Information Processing Standards) : 46013 LATA (Local Access Transport Area) : 636 Rate Center : SO ELLENDL ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 57441 Other Information NPANXX : 605346 County Population : 0 Switch CLLI (Common Language Location Identifier) : ELDLNDXARS3 MSA CBSA (Core Based Statistical Area) : Aberdeen, SD MSA CBSA Code (Core Based Statistical Area) : 10100 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : DICKEY RURAL TELEPHONE COOPERATIVE OCN (Operating Company Number) : 1611 Coverage Area Name : FREDERICK Latitude : 46.0185 Longitude : -98.5258 ‹ previous : 605-345 next › : 605-347 Telephone Number List 605-346-0000 ~ 605-346-9999