630 Area Code — Aurora, IL
Area code 630 serves Aurora and 3 other cities in Illinois. Local time follows America/Chicago. It overlays with 331, so 10-digit dialling is required.
- State
- Illinois
- Primary city
- Aurora
- Timezone
- America/Chicago
- In service since
- 1996
- Type
- Geographic
- Overlay codes
- 331
Cities Served by 630
The 630 area code covers 4 cities and communities in Illinois.
- Aurora
- Naperville
- Wheaton
- Downers Grove
About Area Code 630
Area code 630 is a North American Numbering Plan (NANP) area code that has been in service since 1996. It is administered by NANPA on behalf of the FCC and serves the Illinois region anchored on Aurora.
630 now shares its territory with an overlay code (331). 10-digit dialling is required for local calls within this region because the same 7-digit number can be assigned under either code.
Mobile numbers in 630 are portable: a person who moved away from Aurora may still carry a 630 mobile number on their device. If you receive an unexpected call from a 630 number, run it through the reverse lookup tool above for the most accurate, free identification.
If you live or do business in Illinois, you may also interact with neighbouring or overlay codes (331). See the related codes section below to explore the rest of Illinois.
Other Illinois Area Codes
Continue exploring the Illinois numbering plan.
630 Area Code FAQ
Where is area code 630?
Area code 630 is located in Illinois, primarily serving Aurora and surrounding cities including Naperville, Wheaton, Downers Grove. The region operates on CT (America/Chicago) time.
What state is 630 area code?
630 is a Illinois area code. It was put into service in 1996 and shares its geographic footprint with overlay code 331.
Is 630 a scam area code?
630 is a legitimate North American area code allocated by NANPA to Illinois. Like any geographic area code, scammers sometimes spoof 630 numbers — judge each call by content (urgent demands, unfamiliar transfers) rather than the area code alone. Run the specific number through our reverse lookup if you're unsure.
What time zone does 630 use?
Area code 630 operates on CT (America/Chicago). Numbers in this area code follow standard Illinois time-zone rules including any daylight-saving transitions for that region.
Can I look up a specific 630 phone number?
Yes. Use the reverse lookup widget above to enter a full 630 number. NumLocation returns the line type (mobile, landline, VoIP), carrier, rate-center city, and any public listings tied to the number — free.
What's the difference between 630 and 331?
630 and 331 cover the same Illinois geographic area as overlay codes. Calls between them are local, but you must dial all 10 digits. New phone numbers in this region are assigned from either pool depending on what's available with the carrier at signup.