Area code 405 serves the U.S. state of Oklahoma. It covers the Oklahoma City Metropolitan Area including cities such as Oklahoma City, Edmond, El Reno, Norman, Stillwater, Shawnee, Chickasha, Tuttle, and Moore.
The other three area codes serving Oklahoma are 539 and 918, which covers northeastern Oklahoma (including the city of Tulsa); and 580, which serves western and southern Oklahoma.
Prior to January 1, 1953, the entire state of Oklahoma was served within 405. On that date, northeastern Oklahoma was assigned area code 918. On November 1, 1997, 405 was reduced to cover only central Oklahoma, while the remainder of the state was assigned area code 580. On March 5, 2011 area code 918 has been overlaid with area code 539; they both cover the same area.
| Oklahoma area codes: 405, 580, 918 | ||
|---|---|---|
| North: 580, 539/918 | ||
| West: 580 | area code 405 | East: 539/918 |
| South: 580 | ||