618 Area Code — Belleville, IL
Area code 618 serves Belleville and 3 other cities in Illinois. Local time follows America/Chicago. It has no overlay codes.
- State
- Illinois
- Primary city
- Belleville
- Timezone
- America/Chicago
- In service since
- 1947
- Type
- Geographic
- Overlay codes
- None
Cities Served by 618
The 618 area code covers 4 cities and communities in Illinois.
- Belleville
- East Saint Louis
- Carbondale
- Edwardsville
About Area Code 618
Area code 618 is a North American Numbering Plan (NANP) area code that has been in service since 1947. It is administered by NANPA on behalf of the FCC and serves the Illinois region anchored on Belleville.
618 is currently a single-coverage geographic area code with no overlays. This means a 7-digit number in this area code is unique within its rate centers, though best-practice is always to dial the full 10-digit number when contacting a 618 line.
Mobile numbers in 618 are portable: a person who moved away from Belleville may still carry a 618 mobile number on their device. If you receive an unexpected call from a 618 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. See the related codes section below to explore the rest of Illinois.
Other Illinois Area Codes
Continue exploring the Illinois numbering plan.
618 Area Code FAQ
Where is area code 618?
Area code 618 is located in Illinois, primarily serving Belleville and surrounding cities including East Saint Louis, Carbondale, Edwardsville. The region operates on CT (America/Chicago) time.
What state is 618 area code?
618 is a Illinois area code. It was put into service in 1947 and has no overlay codes — it covers its geographic area exclusively.
Is 618 a scam area code?
618 is a legitimate North American area code allocated by NANPA to Illinois. Like any geographic area code, scammers sometimes spoof 618 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 618 use?
Area code 618 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 618 phone number?
Yes. Use the reverse lookup widget above to enter a full 618 number. NumLocation returns the line type (mobile, landline, VoIP), carrier, rate-center city, and any public listings tied to the number — free.