Area code 309

Area code 309 is an area code that is part of Illinois. It was created as a split from 815 in 1957. It covers towns such as Bloomington, Rock Island, Galesburg, East Moline, East Peoria, Canton, and Morton. It will be overlaid by 861 on February 24, 2023.[1][2]

Sources
  1. https://www2.illinois.gov/IISNews/24203-ICC_Announces_New_861_Area_Code_for_309_Region.pdf
  2. https://www.nationalnanpa.com/planning_letters/PL_577.pdf
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