The New 861 Area Code is Coming to the
Illinois 309 Area Code Region
With new telephone numbers in west-central Illinois in high demand, the Illinois Commerce Commission approved the implementation of the new 861 area code to overlay the existing 309 area code region. The 309 area code serves all or part of Bureau, Dewitt, Fulton, Hancock, Henderson, Henry, Knox, Marshall, Mason, McDonough, McLean, Mercer, Peoria, Rock Island, Schuyler, Stark, Tazewell, Warren, Whiteside,…
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