A local number. A little more freedom.
Get a 331
phone number.
A local number for Aurora, IL. Call and text over WiFi or mobile data, on the phone you already have.
- Calls and texts
- No extra SIM
- Location
- Aurora, Illinois
- Time zone
- Central (GMT -6)
Where is area code 331 located?
Area code 331 is an Illinois area code, serving Aurora, IL and nearby cities including Geneva, Montgomery, Elburn. It is in the Central (GMT -6) time zone.
Who is calling from area code 331?
A 331 call comes from a number assigned to the Aurora, IL area, which can be a mobile, a landline or an app-based number like AvoCall's. Caller ID can be faked from any area code, so if you don't know the number, let it go to voicemail and never share a code you didn't ask for.
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. No second SIM is needed. Right now 20 numbers in the 331 area code are available on this page (checked October 11, 2026 at 8:29 AM UTC).
Find one that feels like yours
Choose a 331 number
20 numbers listed · Checked October 11, 2026 at 8:29 AM UTC.
- (331) 388-0326Sugar Grove, IL
- (331) 204-7295Naperville, IL
- (331) 867-4393Yorkville, IL
- (331) 303-9366Elburn, IL
- (331) 239-2990Yorkville, IL
- (331) 837-7559West Chicago, IL
- (331) 704-8203Kaneville, IL
- (331) 290-8443Aurora, IL
- (331) 808-8344Plano, IL
- (331) 219-0840Aurora, IL
- (331) 315-0598Lombard, IL
- (331) 315-0445Lombard, IL
- (331) 704-8210Kaneville, IL
- (331) 334-1055Batavia, IL
- (331) 808-8366Plano, IL
- (331) 867-4313Yorkville, IL
- (331) 334-1122Batavia, IL
- (331) 290-8413Aurora, IL
- (331) 871-9116West Chicago, IL
- (331) 388-0287Sugar Grove, IL
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 10/08/2026.
331 phone number FAQ
- 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.
- Which 331 numbers are available right now?
- As of October 11, 2026 at 8:29 AM UTC, 20 331 numbers were available to claim on this page. Inventory is re-checked hourly and changes as numbers are claimed, and availability is confirmed at checkout. See the current list.