New Illinois area code 447

Central Illinois’ counties and cities currently using area code 217 will soon be served by a second area code. The new 447 area code, scheduled to enter service in 2021, will overlay NPA 217, covering the same geographic area. Some larger cities affected are: Champaign, Decatur or the state’s capital Springfield.

As a result, 10 digit dialing will be mandatory for all local calls within the newly created overlay complex 217/447, while toll calls will require 1+10 digit dialing.

Key dates:

  • August 29, 2020 – permissive 7/10 digit dialing period begins (during this time local calls within Numbering Plan Area 217 may be dialed using both 7 and 10 digits)
  • February 27, 2021 – mandatory 10 digit dialing begins (all calls within NPA 217 must be dialed using 10 digits: 217 xxx xxxx)
  • March 27, 2021 – new area code 447 enters service

More info in the official announcement from NANPA (North American Numbering Plan Administrator) (PDF document)

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