Area Code 309-304 located in EUREKA, WOODFORD, IL, more detail is as below. Place NPA (Numbering Plan Area) : 309 NXX (Local Number Prefix) : 304 City : EUREKA County : WOODFORD State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 2005-03-27 FIPS (Federal Information Processing Standards) : 17203 LATA (Local Access Transport Area) : 368 Rate Center : EUREKA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 61530 Other Information NPANXX : 309304 County Population : 0 Switch CLLI (Common Language Location Identifier) : PEORILPJXSX 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 : EUREKA Latitude : 40.7233 Longitude : -89.2683 ‹ previous : 309-303 next › : 309-305 Telephone Number List 309-304-0000 ~ 309-304-9999