Area Code 815-201 located in ROCKFORD, WINNEBAGO, IL, more detail is as below. Place NPA (Numbering Plan Area) : 815 NXX (Local Number Prefix) : 201 City : ROCKFORD County : WINNEBAGO State : IL (Illinois) NXX Use Type : Wireless NXX Intro Version : 1998-01-25 FIPS (Federal Information Processing Standards) : 17201 LATA (Local Access Transport Area) : 358 Rate Center : ROCKFORD ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 61101 Other Information NPANXX : 815201 Switch CLLI (Common Language Location Identifier) : RCFRILUSCM0 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 : BANDWIDTH.COM CLEC, LLC - IL OCN (Operating Company Number) : 984E Coverage Area Name : ROCKFORD Latitude : 42.2672 Longitude : -89.0999 ‹ previous : 815-200 next › : 815-201 Telephone Number List 815-201-0000 ~ 815-201-9999