The state ofOklahoma is served by the following area codes:
| Area code | Year created | Parent NPA | Overlay | Numbering plan area |
|---|---|---|---|---|
| 405 | 1947 | – | 405/572 | Central Oklahoma, includingOklahoma City |
| 572 | 2021 | 405 | ||
| 918 | 1953 | 405 | 539/918 | Northeastern Oklahoma, includingTulsa |
| 539 | 2011 | 918 | ||
| 580 | 1997 | 405 | – | Western and southern Oklahoma |