Area Code 815-316 located in ROCKFORD, WINNEBAGO, IL, more detail is as below. Place NPA (Numbering Plan Area) : 815 NXX (Local Number Prefix) : 316 City : ROCKFORD County : WINNEBAGO State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 2000-10-31 FIPS (Federal Information Processing Standards) : 17201 LATA (Local Access Transport Area) : 360 Rate Center : ROCKFORD ZIP Code Count : 1 ZIP Code Frequency : 25 ZIP Code : 61105 Other Information NPANXX : 815316 Switch CLLI (Common Language Location Identifier) : MHPKILBU0MD 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 : TDS METROCOM INC.-IL OCN (Operating Company Number) : 2320 Coverage Area Name : ROCKFORD Latitude : 42.3720 Longitude : -89.0207 ‹ previous : 815-315 next › : 815-316 Telephone Number List 815-316-0000 ~ 815-316-9999