Area Code 641-233 located in LIBERTYVILLE, JEFFERSON, IA, more detail is as below. Place NPA (Numbering Plan Area) : 641 NXX (Local Number Prefix) : 233 City : LIBERTYVILLE County : JEFFERSON State : IA (Iowa) NXX Use Type : Wireless NXX Intro Version : 2001-10-31 FIPS (Federal Information Processing Standards) : 19101 LATA (Local Access Transport Area) : 632 Rate Center : FAIRFIELD ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 52567 Other Information NPANXX : 641233 Switch CLLI (Common Language Location Identifier) : FRFDIATB1MD Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : IOWA WIRELESS SERVICES, LP OCN (Operating Company Number) : 8577 Coverage Area Name : FAIRFIELD Latitude : 41.0087 Longitude : -91.9678 ‹ previous : 641-233 next › : 641-234 Telephone Number List 641-233-0000 ~ 641-233-9999