US Area Code

331

Chicago Suburbs · Illinois

Area code 331 serves Aurora, Naperville, Wheaton and surrounding areas in Illinois. Look up any 331 number below to check for spam, see caller ID, carrier, and line type.

Area Code Details

State / Territory
Illinois
Region
Chicago Suburbs
Major Cities
Aurora, Naperville, Wheaton
Timezone
Central Time
Country
United States
Format
+1 (331) XXX-XXXX

Other Illinois area codes

217 Central Illinois224 Northern Illinois309 Central Illinois312 Chicago447 East-Central Illinois464 South Cook County618 Southern Illinois630 DuPage County708 South/Southwest Suburbs730 Central Illinois773 Chicago779 Northern Illinois815 Northern Illinois847 North Cook / Lake County872 Chicago