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Granite City, Illinois Area Code |
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Granite City, IL Area Code is 618 |
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Granite City, IL is currently using only one area code which is area code 618. Area code 618 was one of the
original area codes assigned to Illinois, including Granite City, when it was established in 1947. Area code 618 covers the southern portion of Illinois and in addition to Granite City serves the major
cities of Alton, Belleville, Carbondale, Collinsville, East St. Louis, Edwardsville, and O'Fallon. Granite City, IL does not utilize any area code overlays. |
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Illinois Area Codes |
217, 224, 309, 312, 331, 618, 630, 708, 773, 779, 815, 847, 872 |
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