Area Code 605-356 located in ELK POINT, UNION, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 356 City : ELK POINT County : UNION State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 46127 LATA (Local Access Transport Area) : 640 Rate Center : ELK POINT ZIP Code Count : 1025 ZIP Code Frequency : 95 ZIP Code : 57025 Other Information NPANXX : 605356 County Population : 0 Switch CLLI (Common Language Location Identifier) : ELPNSDCORS1 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 : QWEST CORPORATION OCN (Operating Company Number) : 9631 Coverage Area Name : ELK POINT Latitude : 42.6870 Longitude : -96.6759 ‹ previous : 605-356 next › : 605-357 Telephone Number List 605-356-0000 ~ 605-356-9999