Area Code 224-203 located in NORTHBROOK, COOK, IL, more detail is as below. Place NPA (Numbering Plan Area) : 224 NXX (Local Number Prefix) : 203 City : NORTHBROOK County : COOK State : IL (Illinois) NXX Use Type : Wireless NXX Intro Version : 9/17/2011 FIPS (Federal Information Processing Standards) : 17031 LATA (Local Access Transport Area) : 358 Rate Center : NORTHBROOK ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 60062 Other Information NPANXX : 224203 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 : CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL OCN (Operating Company Number) : 6333 Coverage Area Name : NORTHBROOK Latitude : 42.1286 Longitude : -87.8310 ‹ previous : 224-202 next › : 224-205 Telephone Number List 224-203-0000 ~ 224-203-9999