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Where is area code 618? Area code 618 is located in southern Illinois and covers Belleville, Granite City, and O'Fallon. It has a single overlay (730) that serves the same area.

Browse area code 618 phone numbers, prefixes and exchanges. The 618 area code serves Saint Louis, Metropolis, Carbondale, Belleville, Olney, covering 194 ZIP codes in 44 counties.

Area codes 618 and 730 are telephone area codes in the North American Numbering Plan (NANP) for southern Illinois.

Mar 1, 2026 · Area Code 618 is located in Illinois. It covers 247 cities, including Belleville, Granite City, Edwardsville, Alton, and Collinsville. It also covers 40 counties, including Madison County, Saint Clair …

Find 618 area code details including city, time zone, and map. Lookup area code 618 phone number, name, and location.

2 days ago · 618 is an area code located in the state of Illinois, US. The largest city it serves is Belleville. Find out where 618 area code zone from, which states, counties and cities it covers. Get the most …

Area code 618 serves southern Illinois, including cities like Belleville, Carbondale, East St. Louis, and Edwardsville. It is one of the original area codes established in 1947 and continues to cover the …

Area Code 618 Boundary Map List of ZIP Codes in Area Code 618 ... List of Counties in Area Code 618 ... List of Major Cities/Towns in Area Code 618

About area code 618: location, common spam callers, related area codes, and more. Includes 618 reverse phone lookup to identify spam callers.