618 Area Code
Illinois, USA
Local time now · Central Time
2:43 AM
Area code 618 is in Illinois, USA, serving Belleville, O'Fallon, Granite City and Edwardsville. It uses Central Time — the time there now is 2:43 AM. 730 is an overlay for the same area, so local calls need 10-digit dialing. In service since 1947.
| Area code | 618 |
|---|---|
| Location | Illinois, USA |
| Major cities | Belleville, O'Fallon, Granite City, Edwardsville, Alton, Collinsville, Carbondale, East St. Louis |
| Time zone | Central Time |
| Overlay codes | 730 |
| In service since | 1947 |
| Dialing | 1+10 digit permissible at service provider discretion. |
Other area codes in Illinois
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Frequently asked questions
Where is area code 618?
Illinois, USA — including Belleville, O'Fallon, Granite City, Edwardsville and Alton.
What time zone is area code 618?
Central Time.
How do I call a 618 number from abroad?
Dial your international access code, then 1 (the country code), then 618 and the 7-digit number — for example +1 618 555 0100. From the UK or India dial 00 1 618 …; from Bangladesh 00 1 618 … .
Is a call from 618 a scam?
Not by itself — 618 is an ordinary geographic area code in Illinois. Numbers can be spoofed, so be careful with unexpected calls asking for money or personal details.
Sources: North American Numbering Plan Administrator (NANPA) NPA database (10/25/2026); major cities from Wikidata (CC0). An area code shows where a number was first assigned — with number portability and mobile phones, the caller may be anywhere.