Area Code 605-230 located in PIERRE, HUGHES, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 230 City : PIERRE County : HUGHES State : SD (South Dakota) NXX Use Type : Wireless NXX Intro Version : 1997-10-11 FIPS (Federal Information Processing Standards) : 46065 LATA (Local Access Transport Area) : 640 Rate Center : MOBRIDGE ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 57501 Other Information NPANXX : 605230 County Population : 0 Switch CLLI (Common Language Location Identifier) : MBRGSDAF0MD MSA CBSA (Core Based Statistical Area) : Pierre, SD MSA CBSA Code (Core Based Statistical Area) : 38180 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 : PIERRE Latitude : 44.3649 Longitude : -100.3549 ‹ previous : 605-229 next › : 605-231 Telephone Number List 605-230-0000 ~ 605-230-9999