Area code 618 - Wikipedia
Area code 618 is the telephone area code serving southern Illinois.Some of the main cities in 618 include Carbondale, Cairo, Belleville, East St. Louis, Edwardsville, Marion, O'Fallon, Alton, Mt. Vernon, Centralia, Herrin, Salem, Metropolis, Fairview Heights, and Collinsville.. 618 was among the original North American area codes created in 1947. In 1954, most of Metro East switched from 217 ...
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