Area Code 309-857 located in PEORIA, PEORIA, IL, more detail is as below. Place NPA (Numbering Plan Area) : 309 NXX (Local Number Prefix) : 857 City : PEORIA County : PEORIA State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 4/6/2009 FIPS (Federal Information Processing Standards) : 17143 LATA (Local Access Transport Area) : 368 Rate Center : PEORIA ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 61606 Other Information NPANXX : 309857 County Population : 0 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 : NEUTRAL TANDEM-ILLINOIS, LLC - IL OCN (Operating Company Number) : 505B Coverage Area Name : PEORIA Latitude : 40.6927 Longitude : -89.5934 ‹ previous : 309-856 next › : 309-858 Telephone Number List 309-857-0000 ~ 309-857-9999