Area Code 309-335 located in GALESBURG, KNOX, IL, more detail is as below. Place NPA (Numbering Plan Area) : 309 NXX (Local Number Prefix) : 335 City : GALESBURG County : KNOX State : IL (Illinois) NXX Use Type : Wireless NXX Intro Version : 1997-01-11 FIPS (Federal Information Processing Standards) : 17095 LATA (Local Access Transport Area) : 977 Rate Center : GALESBURG ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 61402 Other Information NPANXX : 309335 County Population : 0 Switch CLLI (Common Language Location Identifier) : GLBGIL08CM0 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 : CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL OCN (Operating Company Number) : 6333 Coverage Area Name : GALESBURG Latitude : 40.9517 Longitude : -90.3686 ‹ previous : 309-334 next › : 309-336 Telephone Number List 309-335-0000 ~ 309-335-9999