Area Code 331-205 located in AURORA, KANE, IL, more detail is as below. Place NPA (Numbering Plan Area) : 331 NXX (Local Number Prefix) : 205 City : AURORA County : KANE State : IL (Illinois) NXX Use Type : Wireless NXX Intro Version : 10/21/2011 FIPS (Federal Information Processing Standards) : 17089 LATA (Local Access Transport Area) : 358 Rate Center : AURORA ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 60506 Other Information NPANXX : 331205 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 : AURORA Latitude : 41.7561 Longitude : -88.3170 ‹ previous : 331-203 next › : 331-206 Telephone Number List 331-205-0000 ~ 331-205-9999