Area Code 563-237 located in FREDERICKSBURG, CHICKASAW, IA, more detail is as below. Place NPA (Numbering Plan Area) : 563 NXX (Local Number Prefix) : 237 City : FREDERICKSBURG County : CHICKASAW State : IA (Iowa) NXX Use Type : Landline NXX Intro Version : 2001-06-30 FIPS (Federal Information Processing Standards) : 19037 LATA (Local Access Transport Area) : 635 Rate Center : FREDECKSBG ZIP Code Count : 706 ZIP Code Frequency : 99 ZIP Code : 50630 Other Information NPANXX : 563237 County Population : 0 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS OCN (Operating Company Number) : 1170 Coverage Area Name : FREDERICKSBURG Latitude : 42.9662 Longitude : -92.2021 ‹ previous : 563-233 next › : 563-238 Telephone Number List 563-237-0000 ~ 563-237-9999