Area Code 224-255 located in WINNETKA, COOK, IL, more detail is as below. Place NPA (Numbering Plan Area) : 224 NXX (Local Number Prefix) : 255 City : WINNETKA County : COOK State : IL (Illinois) NXX Use Type : Wireless NXX Intro Version : 7/22/2011 FIPS (Federal Information Processing Standards) : 17031 LATA (Local Access Transport Area) : 358 Rate Center : WINNETKA ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 60093 Other Information NPANXX : 224255 County Population : 0 MSA CBSA (Core Based Statistical Area) : Chicago-Naperville-Joliet, IL-IN-WI MSA CBSA Code (Core Based Statistical Area) : 16980 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Overlay : L Company : NEW CINGULAR WIRELESS PCS, LLC - IL OCN (Operating Company Number) : 6534 Coverage Area Name : WINNETKA Latitude : 42.1041 Longitude : -87.7297 ‹ previous : 224-254 next › : 224-256 Telephone Number List 224-255-0000 ~ 224-255-9999