Area code 331: where is it from? Illinois
Area code 331 belongs to Illinois (United States).
- Type
- Landline / geographic
- Region
- Illinois
- Local time now
- —
- How to dial from abroad
- +1 331 XXX XXXX
- Numbers with reports
- 0
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Places using area code 331
Aurora, Naperville, Oswego; western suburbs of Chicago
Area code 331 serves Illinois: Illinois (Aurora, Naperville, Oswego; western suburbs of Chicago). In service since 2007.
Reported numbers starting with 331
No reports yet for numbers starting with 331. If you got a call, look up the full number and share your experience.
Frequently asked questions
Where is area code 331 from?
Area code 331 belongs to Illinois (United States).
How do I call a number with area code 331 from another country?
Dial the country code followed by the full number, like this: +1 331 XXX XXXX. On a mobile phone you can use + instead of the international exit code.
Why am I getting calls from area code 331 if I know nobody there?
An area code shows where the number was assigned, not where the caller is. Telemarketers and scammers use virtual or ported numbers and can even spoof the number shown on screen. Look up the full number to see what other users say before calling back.