Area Code 712-781 located in ATLANTIC, CASS, IA, more detail is as below. Place NPA (Numbering Plan Area) : 712 NXX (Local Number Prefix) : 781 City : ATLANTIC County : CASS State : IA (Iowa) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 19029 LATA (Local Access Transport Area) : 644 Rate Center : MARNE ZIP Code Count : 26 ZIP Code Frequency : 16 ZIP Code : 50022 Other Information NPANXX : 712781 Switch CLLI (Common Language Location Identifier) : MRNEIAXODS0 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : MARNE & ELK HORN TELEPHONE CO. OCN (Operating Company Number) : 1237 Coverage Area Name : MARNE Latitude : 41.4474 Longitude : -95.1053 ‹ previous : 712-779 next › : 712-781 Telephone Number List 712-781-0000 ~ 712-781-9999