Area Code 309-483 located in ALTONA, KNOX, IL, more detail is as below. Place NPA (Numbering Plan Area) : 309 NXX (Local Number Prefix) : 483 City : ALTONA County : KNOX State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 17095 LATA (Local Access Transport Area) : 977 Rate Center : ONEIDA ZIP Code Count : 21 ZIP Code Frequency : 5 ZIP Code : 61414 Other Information NPANXX : 309483 County Population : 0 Switch CLLI (Common Language Location Identifier) : ONEDILXDDS0 MSA CBSA (Core Based Statistical Area) : Galesburg, IL MSA CBSA Code (Core Based Statistical Area) : 23660 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : ONEIDA TELEPHONE EXCHANGE OCN (Operating Company Number) : 1066 Coverage Area Name : ONEIDA Latitude : 41.0783 Longitude : -90.2257 ‹ previous : 309-483 next › : 309-483 Telephone Number List 309-483-0000 ~ 309-483-9999