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United States · Illinois

331 Area Code

Area code 331 serves Aurora and surrounding communities in Illinois, United States. Numbers that start with 331 follow Central time. Enter the full number in the lookup panel to see the carrier, line type and scam risk before you call back.

Location
Aurora, IL
Local time
—Central · GMT-5
Dialing
+1 331 XXX XXXX
caller tracer
Sample resultUS(415) 555-0132
  • LineMobile
  • CarrierT-Mobile USA
  • LocationSan Francisco, CA
  • Caller nameNot published
  • RiskLow risk· 3 reports
Enter a number to run a live traceFree basic lookups every day

Cities and communities in 331

331 is centred on Aurora. The same area is also served by 630, so a Aurora business or resident may have a number under any of these codes.

A geographic area code tells you where a number was issued, not where the phone is today. People keep their numbers when they move, and businesses buy local numbers to look nearby. Use it as a starting point, then confirm with the carrier and line type from a lookup.

Most reported 331 numbers

No reports yet for 331 numbers. Be the first to flag a number that called you.

Got a call from a 331 number that is not listed? Add it on the Who Called Me page. Reports show up here and on every lookup within minutes.

Common scam calls from 331 numbers

Scam callers rotate through local-looking numbers because people answer them more often. These are the patterns reported most often across North America and seen with 331 caller IDs.

  • "the IRS or Social Security" threats. A recorded voice claims a warrant or unpaid tax bill and demands payment by gift card or wire. Government agencies do not call from 331 numbers to demand instant payment.
  • Bank fraud alerts. A caller pretends to be the fraud desk of a bank with branches in Aurora and asks you to "verify" a card number or one-time code. Hang up and call the number on the back of your card.
  • Local-looking spoofed numbers. Scammers spoof 331 numbers so the call looks local. A lookup that shows a VoIP line, or a carrier that does not serve Illinois, is the giveaway.
  • Delivery and utility texts. Texts about a missed package or an overdue Aurora utility bill link to a fake payment page. Trace the sending number before tapping anything.

How to check a 331 number

  1. Enter the full ten-digit number in the panel above. The area code is already filled in.
  2. Read the line type and carrier. A mobile or landline from a carrier that serves Illinois is usually genuine; a VoIP line spun up yesterday is not.
  3. Check the risk level and community reports. If others have flagged the number, do not call back.
  4. Still unsure? Unlock risk details or the owner report for the number.

Frequently asked questions

Where is area code 331?

Area code 331 is in Illinois, United States. Its largest city is Aurora.

What time zone is area code 331 in?

331 follows Central time (GMT-5). Check the live local time above before returning a call.

Is a call from 331 a scam?

Not by itself. 331 is a normal geographic area code, but scammers spoof local numbers. Run the free lookup on the exact number: a VoIP line, a carrier outside Illinois or existing community reports are the warning signs.

Why do I also see 630 in Aurora?

630 is an overlay code that share the same area as 331. New numbers in Aurora may be issued under any of them, so ten-digit dialing is required.