Area Code 712-779 located in MASSENA, CASS, IA, more detail is as below. Place NPA (Numbering Plan Area) : 712 NXX (Local Number Prefix) : 779 City : MASSENA 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 : MASSENA ZIP Code Count : 385 ZIP Code Frequency : 92 ZIP Code : 50853 Other Information NPANXX : 712779 Switch CLLI (Common Language Location Identifier) : MSSNIAXODS0 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : MASSENA TELEPHONE CO. OCN (Operating Company Number) : 1239 Coverage Area Name : MASSENA Latitude : 41.2486 Longitude : -94.7739 ‹ previous : 712-779 next › : 712-781 Telephone Number List 712-779-0000 ~ 712-779-9999