Area codes 309 and 861

Area codes 309 and 861 are area codes in 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 was overlaid by 861 on February 24, 2023.

Sources

  1. ↑ "Illinois" (PDF).
  2. ↑ "Archived copy" (PDF). Archived from the original (PDF) on 2022-10-04. Retrieved 2022-03-21.{{cite web}}: CS1 maint: archived copy as title (link)