Area Code 641-228 located in IONIA, CHICKASAW, IA, more detail is as below. Place NPA (Numbering Plan Area) : 641 NXX (Local Number Prefix) : 228 City : IONIA County : CHICKASAW State : IA (Iowa) NXX Use Type : Landline NXX Intro Version : 2000-08-20 FIPS (Federal Information Processing Standards) : 19037 LATA (Local Access Transport Area) : 632 Rate Center : CHARLES CY ZIP Code Count : 109 ZIP Code Frequency : 2 ZIP Code : 50645 Other Information NPANXX : 641228 Switch CLLI (Common Language Location Identifier) : CHCYIATCRS2 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : QWEST CORPORATION OCN (Operating Company Number) : 9631 Coverage Area Name : CHARLES CITY Latitude : 43.0739 Longitude : -92.6785 ‹ previous : 641-227 next › : 641-228 Telephone Number List 641-228-0000 ~ 641-228-9999