List of Oklahoma area codes explained

The state of Oklahoma is served by the following area codes:

• 405/572: Central Oklahoma including Oklahoma City (original area code created in 1947; 572 added as overlay on April 24, 2021^{[1] [2] [3]}
• 580: Western and southern Oklahoma (split from 405 in 1997)
• 539/918: Northeastern Oklahoma including Tulsa (918 created in 1953 as split from 405; 539 added as overlay in 2011)

Notes and References

1. News: New area code number takes effect. KFOR.
2. News: 572 area code, what you need to know. Dobson.net.
3. News: Mandatory 10 digit dialing. okcommerce.gov.