Area code 331
331 is Naperville, Aurora, Bolingbrook, Illinois.
Area code 331 at a glance
- State
- Illinois
- Main cities
- Naperville, Aurora, Bolingbrook, Downers Grove, Wheaton, Lombard, Hinsdale, Batavia
- Time zone
- Central Time
- Local time now
- --:--:--
- Overlay codes
- 630
- In service since
- 2007
630 covers the exact same area as 331 — both are dialed with all 10 digits.
Get a 331 number
Rent a real 331 number and receive calls and text messages on it from anywhere. Calls ring in your browser, and voicemail is transcribed automatically.
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- +1 331 315 0423
- +1 331 388 0123
- +1 331 310 9921
- +1 331 837 7154
- +1 331 837 7164
Call a 331 number from abroad
Call any 331 number from your browser — no SIM, no app install, and no international roaming charge.
Calls to United States start at $0.02/min from QuikRing.
Call now in your browserCalling 331 from inside the US or Canada
Dial 1, then 331, then the 7-digit number.
Calling a 331 number or a 1-800 number from outside the US or Canada? Here is how to reach it from abroad.
Frequently asked questions
Where is area code 331?
Area code 331 covers Naperville, Aurora, Bolingbrook in Illinois.
What time is it in area code 331?
Area code 331 is in the Central Time time zone. See the live clock above for the current local time.
Is 630 the same area as 331?
Yes. 630 is an overlay of 331 — they cover the exact same area, so every call there needs all 10 digits dialed.
How do I get an area code 331 phone number?
Sign up for QuikRing and rent one of the available 331 numbers shown above. It starts working immediately and can receive real calls and text messages.
How much does it cost to call 331 from abroad?
Calls to United States numbers, including area code 331, start at $0.02/min with QuikRing — no roaming plan or SIM needed.