Area Code 331-888 located in WARRENVILLE, DUPAGE, IL, more detail is as below. Place NPA (Numbering Plan Area) : 331 NXX (Local Number Prefix) : 888 City : WARRENVILLE County : DUPAGE State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 9/24/2010 FIPS (Federal Information Processing Standards) : 17043 LATA (Local Access Transport Area) : 358 Rate Center : WARRENVL ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 60555 Other Information NPANXX : 331888 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 : CYGNUS TELECOMMUNICATIONS CORPORATION - IL OCN (Operating Company Number) : 161F Coverage Area Name : WARRENVILLE Latitude : 41.8203 Longitude : -88.1751 ‹ previous : 331-826 next › : 331-999 Telephone Number List 331-888-0000 ~ 331-888-9999