Area Code 815-406 located in BELVIDERE, BOONE, IL, more detail is as below. Place NPA (Numbering Plan Area) : 815 NXX (Local Number Prefix) : 406 City : BELVIDERE County : BOONE State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 2001-03-03 FIPS (Federal Information Processing Standards) : 17007 LATA (Local Access Transport Area) : 360 Rate Center : BYRON ZIP Code Count : 1 ZIP Code Frequency : 50 ZIP Code : 61008 Other Information NPANXX : 815406 Switch CLLI (Common Language Location Identifier) : CRDVILXDRS0 MSA CBSA (Core Based Statistical Area) : Rockford, IL MSA CBSA Code (Core Based Statistical Area) : 40420 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : FRONTIER NORTH, INC. - IL OCN (Operating Company Number) : 1015 Coverage Area Name : BYRON Latitude : 42.1255 Longitude : -89.2593 ‹ previous : 815-405 next › : 815-406 Telephone Number List 815-406-0000 ~ 815-406-9999