Area Code 605-300 located in BERESFORD, UNION, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 300 City : BERESFORD County : UNION State : SD (South Dakota) NXX Use Type : Wireless NXX Intro Version : 2004-01-27 FIPS (Federal Information Processing Standards) : 46127 LATA (Local Access Transport Area) : 640 Rate Center : BERESFORD ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 57004 Other Information NPANXX : 605300 County Population : 0 Switch CLLI (Common Language Location Identifier) : BRFRSDAE0MD MSA CBSA (Core Based Statistical Area) : Sioux City, IA-NE-SD MSA CBSA Code (Core Based Statistical Area) : 43580 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 : BERESFORD Latitude : 43.0835 Longitude : -96.7808 ‹ previous : 605-299 next › : 605-301 Telephone Number List 605-300-0000 ~ 605-300-9999