Area Code 712-778 located in GRISWOLD, CASS, IA, more detail is as below. Place NPA (Numbering Plan Area) : 712 NXX (Local Number Prefix) : 778 City : GRISWOLD 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 : GRISWOLD ZIP Code Count : 901 ZIP Code Frequency : 95 ZIP Code : 51535 Other Information NPANXX : 712778 Switch CLLI (Common Language Location Identifier) : GRSWIAXODS0 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : GRISWOLD COOPERATIVE TELEPHONE CO. OCN (Operating Company Number) : 1195 Coverage Area Name : LEWIS Latitude : 41.2411 Longitude : -95.1356 ‹ previous : 712-778 next › : 712-779 Telephone Number List 712-778-0000 ~ 712-778-9999
