Area Code 331-684 located in AURORA, KANE, IL, more detail is as below. Place NPA (Numbering Plan Area) : 331 NXX (Local Number Prefix) : 684 City : AURORA County : KANE State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 7/12/2007 FIPS (Federal Information Processing Standards) : 17089 LATA (Local Access Transport Area) : 358 Rate Center : AURORA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 60505 Other Information NPANXX : 331684 County Population : 0 Switch CLLI (Common Language Location Identifier) : NPVLILBGRP0 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 : SIGECOM, LLC - IL OCN (Operating Company Number) : 667E Coverage Area Name : AURORA Latitude : 41.7561 Longitude : -88.3170 ‹ previous : 331-645 next › : 331-725 Telephone Number List 331-684-0000 ~ 331-684-9999