Area Code 309-479 located in CASTLETON, STARK, IL, more detail is as below. Place NPA (Numbering Plan Area) : 309 NXX (Local Number Prefix) : 479 City : CASTLETON County : STARK State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 17175 LATA (Local Access Transport Area) : 368 Rate Center : CASTLETON ZIP Code Count : 12 ZIP Code Frequency : 12 ZIP Code : 61426 Other Information NPANXX : 309479 County Population : 0 Switch CLLI (Common Language Location Identifier) : CSTNILXDRS0 MSA CBSA (Core Based Statistical Area) : Peoria, IL MSA CBSA Code (Core Based Statistical Area) : 37900 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : FRONTIER NORTH, INC. - IL OCN (Operating Company Number) : 1015 Coverage Area Name : BRADFORD Latitude : 41.1190 Longitude : -89.7051 ‹ previous : 309-479 next › : 309-479 Telephone Number List 309-479-0000 ~ 309-479-9999