Area Code 309-358 located in MAQUON, KNOX, IL, more detail is as below. Place NPA (Numbering Plan Area) : 309 NXX (Local Number Prefix) : 358 City : MAQUON 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) : 368 Rate Center : YATES CITY ZIP Code Count : 15 ZIP Code Frequency : 3 ZIP Code : 61458 Other Information NPANXX : 309358 County Population : 0 Switch CLLI (Common Language Location Identifier) : YTCYILXDDS0 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 : MID CENTURY TELEPHONE CO-OPERATIVE OCN (Operating Company Number) : 1054 Coverage Area Name : YATES CITY Latitude : 40.7774 Longitude : -90.0166 ‹ previous : 309-358 next › : 309-358 Telephone Number List 309-358-0000 ~ 309-358-9999