Area Code 712-204 located in SIOUX CITY, WOODBURY, IA, more detail is as below. Place NPA (Numbering Plan Area) : 712 NXX (Local Number Prefix) : 204 City : SIOUX CITY County : WOODBURY State : IA (Iowa) NXX Use Type : Wireless NXX Intro Version : 2001-03-03 FIPS (Federal Information Processing Standards) : 19193 LATA (Local Access Transport Area) : 630 Rate Center : SIOUX CITY ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 51103 Other Information NPANXX : 712204 Switch CLLI (Common Language Location Identifier) : SXCYIA788MD 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 : BROOKINGS MUNICIPAL UTILITIES OCN (Operating Company Number) : 6982 Coverage Area Name : SIOUX CITY Latitude : 42.5009 Longitude : -96.4096 ‹ previous : 712-204 next › : 712-207 Telephone Number List 712-204-0000 ~ 712-204-9999