Area Code 605-251 located in SIOUX FALLS, MINNEHAHA, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 251 City : SIOUX FALLS County : MINNEHAHA State : SD (South Dakota) NXX Use Type : Wireless NXX Intro Version : 1999-05-10 FIPS (Federal Information Processing Standards) : 46099 LATA (Local Access Transport Area) : 640 Rate Center : SIOUX FLS ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 57104 Other Information NPANXX : 605251 County Population : 0 Switch CLLI (Common Language Location Identifier) : SXFLSDCHCM2 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 : NEW CINGULAR WIRELESS PCS, LLC - IL OCN (Operating Company Number) : 6534 Coverage Area Name : SIOUX FALLS Latitude : 43.5409 Longitude : -96.7263 ‹ previous : 605-251 next › : 605-252 Telephone Number List 605-251-0000 ~ 605-251-9999