🇺🇸 618 area code
Area code 618 covers Belleville, Granite City, Carbondale and East St. Louis and the surrounding area in Illinois. It shares that territory with 730, so the same neighbourhood can have numbers in any of them. Enter a 618 number below for a free check before you call back.
- Location: Belleville, Illinois
- Time zone: Central (UTC−6)
- In service since 1947
番号を調べる
1 回目の照会で、有効性・通信事業者・回線種別・地域が分かります。
Area code 618 at a glance
- Area code
- 618
- Location
- Illinois, United States
- Main cities
- Belleville, Granite City, Carbondale, East St. Louis, Edwardsville, Alton
- Time zone
- Central (UTC−6)
- Local time now
- —
- In service since
- 1947
- Overlay codes
- 730
- Codes split from it
- 730
- Local calls
- Dial 10 digits
- Number format
- (618) 555-0123
- From abroad
- +1 618 555 0123
Cities in area code 618
- Belleville
- Granite City
- Carbondale
- East St. Louis
- Edwardsville
- Alton
- Collinsville
- Benton
- Marion
- Mount Vernon
Is a 618 call a scam?
An area code tells you where a number was first assigned, not where the caller is. Mobile numbers keep their area code when people move, and internet (VoIP) numbers can be picked in any area code — so a 618 number can be calling from anywhere.
Robocallers exploit that with "neighbor spoofing": showing a 618 number to people in Illinois because a local-looking call is more likely to be answered. If a 618 call claims to be your bank, the IRS or a delivery company, hang up and call the official number yourself.
About area code 618
618 is one of the original North American area codes, created in 1947 when AT&T and the Bell System first divided the continent into numbering plan areas.
It is part of the 618/730 overlay: the codes cover the same area, and a new line there can be given a number in any of them. Two neighbours — or two phones in one household — can have different area codes. That is also why local calls need the full ten digits.
As the region grew, 730 was carved out of or added to 618.
よくある質問
Area code 618 questions
Sources: NANPA NPA database (11/04/2026) and Google libphonenumber. Area codes show where a number was assigned, not where its owner is today.
Where is area code 618?
Area code 618 is in Illinois, United States. It covers Belleville, Granite City, Carbondale, East St. Louis, Edwardsville and Alton.
What time zone is area code 618?
618 is in the Central (UTC−6) time zone, and observes daylight saving time.
What area codes overlay 618?
730 serves the same area as 618. Numbers in all of them are local to one another.
When did area code 618 start?
618 entered service in 1947.
How do I find out who called me from 618?
Enter the full number in the lookup at the top of this page. The free check confirms whether the number is valid and shows its carrier, line type and region; a full report adds owner and public-web records where they are available.
Why am I getting calls from area code 618?
If you live in or near Illinois, they may be genuinely local — or robocalls spoofing a local-looking number. Unknown 618 callers who will not leave a message are best looked up before you call back.