Area Code 618 — Belleville, Illinois

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About Area Code 618

Region Code
618
City
Belleville
State
Illinois
Population
1,150,000
Largest City
Belleville
Neighboring Codes
  • 314 (St Louis, Missouri)
  • 557 (Saint Louis, Missouri)
  • 636 (St Charles, Missouri)
  • 573 (Columbia, Missouri)
  • 217/447 (Springfield, Illinois)
  • 270 (Bowling Green, Kentucky)
  • 812 (Evansville, Indiana)
Time Zone
Central Time

Map of Area Code 618

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History & Cultural Notes

Area code 618 serves the southern third of Illinois, anchored by Belleville and the Metro East. It was among the original 1947 North American Numbering Plan assignments. Rather than being split, the territory stayed intact; an all-services overlay (730) began in 2023 to add capacity. Proximity to St. Louis shapes commuting and cross-river trade, while Belleville, Edwardsville, and Carbondale link courts, universities, and regional health systems.

Economic activity spans defense, manufacturing, logistics, education, agriculture, and energy:

  • Scott Air Force Base anchors defense, cyber, and air-mobility support, with contractor clusters near O'Fallon and Shiloh.
  • Manufacturing and logistics: steel and metals in Granite City, plus river, rail, and I-55/I-64/I-57 distribution moving grain, steel, and consumer goods.
  • Healthcare and higher education drive employment via Memorial and HSHS systems, SIU Edwardsville, and SIU Carbondale.
  • Agriculture and legacy coal fields diversify income; wineries and craft producers add tourism.

Belleville’s German-American and Catholic heritage appears in festivals, parish institutions, and its historic square. The region balances Metro East suburbia with rural "Little Egypt," home to the UNESCO-listed Cahokia Mounds, river towns, and outdoor destinations such as the Shawnee National Forest and wine trails. With the 2023 overlay came 10-digit dialing, but identity remains tied to river trade, Midwest farm country, and long-standing ties to St. Louis.