Area code 331
Get a 331 phone number
To get a 331 phone number, pick an available 331 number below and sign up for AvoCall. Your new number works for calls and texts on the phone you already own over WiFi or data. Current web pricing is verified at checkout. No second SIM and no new device are required.
- Location
- Aurora, IL, Illinois
- Time zone
- Central (GMT -6)
- Related area codes
- Related:630
The 331 area code covers Aurora, IL and nearby Illinois communities.
Top 20 331 numbers available right now
Pulled live from our carrier network. Last updated: August 25, 2026 at 11:02 PM UTC.
Every number requires an AvoCall plan. Current web pricing is verified at checkout, and number availability changes often.
About the 331 area code
Since 2007, area code 331 has covered Aurora, Illinois along with Geneva, Bolingbrook, Joliet, and Plainfield, a territory that sits in the Central time zone.
The code was introduced as an overlay on area code 630 rather than through a split, so both codes blanket the same ground. Residents dial ten digits even for local numbers, the standard arrangement wherever overlays operate.
Dialing note: 331 is part of an overlay complex with 630, so local calls in this area are dialed with all ten digits.
Numbering details on this page (service dates and overlay status) are checked against the NANPA numbering registry. Registry data as of 07/16/2026.
331 phone number FAQ
- How do I get a 331 phone number?
- Pick an available 331 number and sign up for AvoCall. Your new Aurora, IL number works for calls and texts on your existing phone over WiFi or data. Current web pricing is verified at checkout. There is no second SIM and no new device.
- Where is the 331 area code?
- It serves Aurora, IL and nearby cities in Illinois, including Aurora, Geneva, Montgomery.
- Can I receive verification codes on a 331 number?
- AvoCall 331 numbers support calling and messaging. Verification-text compatibility varies by sender; short-code and 2FA delivery is not guaranteed.