10-digit Dialing Begins April 24

Mandatory 10-digit dialing will begin April 24, 2021.  The move to 10-digit dialing for local 405 area code calls is necessary to enable the addition of another area code for the area currently served only by 405. The additional area code (572) is needed to ensure there will be enough telephone numbers available for the area.

Here is the schedule for local-call 10 digit dialing within the 405 area code and the addition of the 572 area code:

  • October 24, 2020 – “Permissive” 10-digit dialing begins. Customers are encouraged to begin using 10-digit dialing (405+local number) to make local calls. However, local calls will still be completed if local 7-digit number is entered without the area code.
  • April 24, 2021 – Mandatory 10-digit dialing begins. All local calls will require the area code + local number.
  • May 24, 2021 – 572 area code added to the area that had been served only by 405.

The addition of the 572 area code will not change how local calls are billed (i.e., local calls will remain local calls, regardless of whether the number dialed is a 405 or 572 area code).

The Oklahoma Corporation Commission's Public Utility Division hosted a Virtual Town Hall Meeting on November 6, 2019. A recording of this meeting is available on the Commission's Facebook page The purpose of this Virtual Town Hall was to inform the public about the area code relief process in the 405 area code (or "NPA"). Please visit the Oklahoma Corporation Commission's website for additional information.