Area Code 605-254 located in SIOUX FALLS, MINNEHAHA, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 254 City : SIOUX FALLS County : MINNEHAHA State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 46099 LATA (Local Access Transport Area) : 640 Rate Center : SIOUX FLS ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 57105 Other Information NPANXX : 605254 County Population : 0 Switch CLLI (Common Language Location Identifier) : SXFLSD10A03 MSA CBSA (Core Based Statistical Area) : Sioux Falls, SD MSA CBSA Code (Core Based Statistical Area) : 43620 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : AT&T LOCAL OCN (Operating Company Number) : 7421 Coverage Area Name : SIOUX FALLS Latitude : 43.5470 Longitude : -96.7638 ‹ previous : 605-253 next › : 605-254 Telephone Number List 605-254-0000 ~ 605-254-9999