Area code 309

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Area codes of Illinois

Area code 309/861 is a telephone area code in the North American Numbering Plan (NANP) for the west-central part of the U.S. state of Illinois. Two hundred and one municipalities are included in the plan such as Bloomington, Canton, East Moline, East Peoria, Galesburg, Kewanee, Macomb, Minonk, Moline, Morton, Normal, Pekin, Peoria, Rock Island, Silvis, and many smaller communities within the western part of central Illinois.

The area code was created in 1957, and was one of the first area codes not serving an entire state, but having the digit 0 as the second digit of the code. It was the only new area code created in Illinois between the 1947 implementation start of a national numbering plan and the 1989 creation of area code 708.

On October 24, 2021, area code 309 was transitioned to ten-digit dialing, despite not being part of an overlay numbering plan, in which multiple area codes are assigned to a numbering plan area. The area code had telephone numbers assigned for the central office code 988. In 2020, 988 was designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which created a conflict for exchanges that still permitted seven-digit dialing.[1]

NANPA exhaust projections for 309 in 2021 determined an exhaustion date in late 2023.[2] For mitigation, a new all-services distributed overlay was announced with the new area code 861,[3] which is scheduled for operation on February 24, 2023.[4] The earliest date central office codes may be requested is December 20, 2022, but only after all central office codes in area code 309 have been allocated.

Service area

Communities in the numbering plan area include:

See also

References

  1. ^ "Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline)" (PDF). North American Numbering Plan Administrator. 2021-01-08. Retrieved 2021-03-09.
  2. ^ October 2021 NANPA Exhaust Projection
  3. ^ "ICC Announces New 861 Area Code for 309 Region" (PDF). Illinois Commerce Commission. 2021-11-29. Retrieved 2022-03-14.
  4. ^ NANPA Planning Letter No. 577

External links

Illinois area codes: 217, 224/847, 309, 312, 331/630, 618, 708, 773, 779/815, 872
North: 563, 815/779
West: 319, 563 309/861 East: 815/779
South: 217/447
Iowa area codes: 319, 515, 563, 641, 712

Coordinates: 40°41′31″N 89°35′28″W / 40.69194°N 89.59111°W / 40.69194; -89.59111 (Area code 309 tandem (Peoria Jefferson))

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