Area Code 331-200 located in HANOVER PARK, COOK, IL, more detail is as below. Place NPA (Numbering Plan Area) : 331 NXX (Local Number Prefix) : 200 City : HANOVER PARK County : COOK State : IL (Illinois) NXX Use Type : Wireless NXX Intro Version : 7/11/2011 FIPS (Federal Information Processing Standards) : 17031 LATA (Local Access Transport Area) : 358 Rate Center : BARTLETT ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 60133 Other Information NPANXX : 331200 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 : T-MOBILE USA, INC. OCN (Operating Company Number) : 6529 Coverage Area Name : BARTLETT Latitude : 41.9940 Longitude : -88.1922 ‹ previous : 330-999 next › : 331-201 Telephone Number List 331-200-0000 ~ 331-200-9999