Area Code 605-984 located in ALCESTER, UNION, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 984 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 : HUDSON ZIP Code Count : 18 ZIP Code Frequency : 8 ZIP Code : 57001 Other Information NPANXX : 605984 Switch CLLI (Common Language Location Identifier) : HDSNSDXADS0 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 : ALLIANCE COMMUNICATIONS COOPERATIVE, INC. (BALTIC) OCN (Operating Company Number) : 1642 Coverage Area Name : HUDSON Latitude : 43.1292 Longitude : -96.4512 ‹ previous : 605-983 next › : 605-984 Telephone Number List 605-984-0000 ~ 605-984-9999