Area Code 309-584 located in ALEDO, MERCER, IL, more detail is as below. Place NPA (Numbering Plan Area) : 309 NXX (Local Number Prefix) : 584 City : ALEDO County : MERCER State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 17131 LATA (Local Access Transport Area) : 634 Rate Center : JOY ZIP Code Count : 22 ZIP Code Frequency : 7 ZIP Code : 61231 Other Information NPANXX : 309584 County Population : 0 Switch CLLI (Common Language Location Identifier) : JOY ILXDRS0 MSA CBSA (Core Based Statistical Area) : Davenport-Moline-Rock Island, IA-IL MSA CBSA Code (Core Based Statistical Area) : 19340 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL OCN (Operating Company Number) : 1183 Coverage Area Name : JOY Latitude : 41.1979 Longitude : -90.8799 ‹ previous : 309-583 next › : 309-584 Telephone Number List 309-584-0000 ~ 309-584-9999