Area Code 309-503 located in TOWANDA, MCLEAN, IL, more detail is as below. Place NPA (Numbering Plan Area) : 309 NXX (Local Number Prefix) : 503 City : TOWANDA County : MCLEAN State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 2005-03-27 FIPS (Federal Information Processing Standards) : 17113 LATA (Local Access Transport Area) : 366 Rate Center : TOWANDA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 61776 Other Information NPANXX : 309503 County Population : 0 Switch CLLI (Common Language Location Identifier) : BLTNILXDZMD MSA CBSA (Core Based Statistical Area) : Bloomington-Normal, IL MSA CBSA Code (Core Based Statistical Area) : 14060 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL OCN (Operating Company Number) : 846F Coverage Area Name : TOWANDA Latitude : 40.5645 Longitude : -88.9012 ‹ previous : 309-502 next › : 309-504 Telephone Number List 309-503-0000 ~ 309-503-9999