Area Code 712-986 located in ROCK VALLEY, SIOUX, IA, more detail is as below. Place NPA (Numbering Plan Area) : 712 NXX (Local Number Prefix) : 986 City : ROCK VALLEY County : SIOUX State : IA (Iowa) NXX Use Type : Landline NXX Intro Version : 1996-01-10 FIPS (Federal Information Processing Standards) : 19167 LATA (Local Access Transport Area) : 640 Rate Center : BELOIT ZIP Code Count : 8 ZIP Code Frequency : 15 ZIP Code : 51247 Other Information NPANXX : 712986 Switch CLLI (Common Language Location Identifier) : CNTNSDCORS1 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : QWEST CORPORATION OCN (Operating Company Number) : 9631 Coverage Area Name : INWOOD Latitude : 43.3018 Longitude : -96.5921 ‹ previous : 712-982 next › : 712-986 Telephone Number List 712-986-0000 ~ 712-986-9999