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618 Area Code: Location, Time Zone & Phone Lookup

(618)
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What Does Area Code 618 Mean?

Area code 618 is located in southern Illinois and covers Belleville, Granite City, and O'Fallon. It is the only area code that serves the area.

Belleville Illinois map

Other Cities That Use 618 Area Code

Area Codes Starting with 6

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Phone Number Prefixes In The 618 Area Code