Area code 331: Aurora, Illinois
Area code 331 is a Illinois code serving Aurora, Naperville and Wheaton, on Central Time. It overlays 630, so numbers in the same area may start with any of them. From abroad, dial +1 331 and the 7-digit number.
Updated
At a glance
- State
- Illinois
- Places served
- Aurora, Naperville, Wheaton
- Time zone
- Central TimeUTC−6, UTC−5 in summer
- Overlay codes
- 630Same area, assigned when numbers ran short.
- Country
- United States (+1)
- Number format
- (331) 555-0123+1 331 555 0123 in international format
How to call a 331 number
All +1 numbers are 10 digits: the 3-digit area code and a 7-digit local number.
| Calling from | Dial |
|---|---|
| Inside the US or Canada | 1 331 555 0123 |
| The UK and most of Europe | 00 1 331 555 0123 |
| Australia | 0011 1 331 555 0123 |
| Any mobile | +1 331 555 0123 |
555-0123 is a placeholder; use the real 7-digit number.
Get a (331) number without living there
A callmins US number costs $2.00/month, no setup fee. It rings in your browser or the callmins app anywhere in the world, receives texts, and needs no ID or local address. When you buy, search by area code to look for a 331 number.
Availability changes daily
Popular codes sell out. If there's no 331 number free, try the overlay code 630 or another Illinois code below. US numbers don't receive WhatsApp codes; use a UK number for that.
Other Illinois area codes
Questions people ask
Where is area code 331?
Area code 331 is in Illinois, the United States. It serves Aurora, Naperville and Wheaton, and shares the same area with 630 (overlay codes).
What time zone is area code 331?
Area code 331 is on Central Time (UTC−6, UTC−5 in summer). Where an area straddles a time-zone line, this is the time most of its callers keep.
How do I call a 331 number from abroad?
Dial your exit code, then 1, then 331 and the 7-digit number: 00 1 331 from the UK and most of Europe, or +1 331 from any mobile. Inside the US and Canada, dial 1 331 and the number.
Is a call from area code 331 a scam?
331 is an ordinary geographic area code, not a premium-rate or toll-free one. But caller ID can be faked, so a familiar-looking local code proves nothing about who is calling. Don't share codes or payment details with an unexpected caller.
Can I get a 331 phone number?
You can search callmins for a 331 number when you buy a US number ($2.00/month, no setup fee). Which area codes have numbers free changes daily; if 331 has none, pick a nearby or overlay code such as 630.
Related
A 331 number, in your browser.
$2.00/month, no setup fee. Calls and texts on your laptop or phone, from anywhere.
Area code details are compiled from North American Numbering Plan assignments and list the best-known places served; check NANPA for the full boundary.