Area Code 815-525 located in SOUTH BELOIT, WINNEBAGO, IL, more detail is as below. Place NPA (Numbering Plan Area) : 815 NXX (Local Number Prefix) : 525 City : SOUTH BELOIT County : WINNEBAGO State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 1999-02-27 FIPS (Federal Information Processing Standards) : 17201 LATA (Local Access Transport Area) : 354 Rate Center : SO BELOIT ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 61080 Other Information NPANXX : 815525 Switch CLLI (Common Language Location Identifier) : MDSNWIKWDS0 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 : BELOIT Latitude : 42.5041 Longitude : -89.0396 ‹ previous : 815-524 next › : 815-526 Telephone Number List 815-525-0000 ~ 815-525-9999