State directory / Oklahoma
US number directory / Oklahoma
Oklahoma
area codes
Oklahoma has 5 geographic area codes in the NANPA snapshot, with 405 the earliest listed (1947).
5geographic area codes
in this reference
in this reference
Earliest listed405 · 1947
Standard timeCT
Overlays in this stateYes — see code notes
Major city starting points
Oklahoma City (capital and largest city): 405, 572.
| City | Reference role | Codes to check |
|---|---|---|
| Oklahoma City | Capital and largest city | 405, 572 |
City reference · 2026-10-25
Codes, cities & coverage
Oklahoma's active territorial overlay complexes are 405/572; 539/918.
| Code | Region / major cities named in the reference | Introduced | Active overlay complexes |
|---|---|---|---|
| 405 | Oklahoma ( Oklahoma City , Stillwater, Edmond, Norman, Shawnee, and most of central Oklahoma) | 01-Jan-1947 | 405/572 |
| 539 | Oklahoma ( Tulsa , Bartlesville, McAlester, Muskogee, Henryetta, and northeastern Oklahoma) | 01-Apr-2011 | 539/918 |
| 572 | Oklahoma ( Oklahoma City , Stillwater, Edmond, Norman, Shawnee, and most of central Oklahoma) | 24-May-2021 | 405/572 |
| 580 | Oklahoma ( Ponca City , Ada, Ardmore, Enid, Lawton, Elk City, and most of southern and western Oklahoma) | 01-Nov-1997 | None active in NANPA snapshot |
| 918 | Oklahoma ( Tulsa , Bartlesville, McAlester, Muskogee, Henryetta, and northeastern Oklahoma) | 01-Jan-1953 | 539/918 |
NANPA dates & overlays · 2026-10-25
Wikipedia geography · 2026-10-25 · CC BY-SA 4.0
Time zones
Oklahoma spans 1 standard-time offset in the state reference: CT.
| Standard offset | Region | Daylight saving |
|---|---|---|
| UTC−06:00 CT | Central ( Kenton observes Mountain time on a de facto basis) | Yes |