A new area code was approved this year on January 8 by the Oklahoma Corporation Commission to serve the central portion of the state currently using area code 405. Some of the towns and cities in the 405 Numbering Plan Area include: Arcadia, Blanchard, Carney, Dover, Oklahoma City, Tecumseh or Yukon. The new code will enter service next year in the month of May. As a result, 10 digit dialing will be introduced for all local calls in the area and 11 digit dialing for toll calls.
- October 24, 2020 – permissive 7/10 digit dialing begins (local calls between telephone numbers in NPA 405 can be dialed using either 7 or 10 digits, the latter being encouraged
- April 24, 2021 – mandatory 10 digit dialing begins for all local calls in NPA 405
- May 24, 2021 – new area code 572 enters service
See official NANPA announcement for more information (PDF document)