Area Code 605-957 located in ALCESTER, UNION, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 957 City : ALCESTER 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 : BERESFORD ZIP Code Count : 15 ZIP Code Frequency : 4 ZIP Code : 57001 Other Information NPANXX : 605957 Switch CLLI (Common Language Location Identifier) : LNNXSDXARS1 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 : KNOLOGY COMMUNITY TELEPHONE, INC. OCN (Operating Company Number) : 1652 Coverage Area Name : BERESFORD Latitude : 43.0835 Longitude : -96.7808 ‹ previous : 605-956 next › : 605-957 Telephone Number List 605-957-0000 ~ 605-957-9999