Area Code 605-223 located in PIERRE, HUGHES, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 223 City : PIERRE County : HUGHES State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 46065 LATA (Local Access Transport Area) : 640 Rate Center : PIERRE ZIP Code Count : 240 ZIP Code Frequency : 21 ZIP Code : 57501 Other Information NPANXX : 605223 County Population : 0 Switch CLLI (Common Language Location Identifier) : FTPRSDCERS1 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 : QWEST CORPORATION OCN (Operating Company Number) : 9631 Coverage Area Name : PIERRE Latitude : 44.3550 Longitude : -100.3734 ‹ previous : 605-222 next › : 605-223 Telephone Number List 605-223-0000 ~ 605-223-9999