Oklahoma Area Codes
4 area codes in Oklahoma, United States. Country code: +1. Find area codes by city and region.
All Oklahoma Area Codes
| Area Code | Major Cities | Region |
|---|---|---|
| 405 | Oklahoma City | Central |
| 539 | Tulsa (overlay) | Northeast |
| 580 | Lawton, Enid | West |
| 918 | Tulsa | Northeast |
About Oklahoma Area Codes
Oklahoma uses 4 area codes under the North American Numbering Plan (NANP), serving Enid, Lawton, Oklahoma City, Tulsa. Each code follows the 3-digit format and covers a defined geographic region within the state.
Overlay Codes in Oklahoma
Oklahoma has adopted 1 overlay code(s): 539. An overlay assigns a new area code to the same geographic region as an existing code, so both codes serve the same area. When overlay codes are active, callers must dial all 10 digits (area code + number) even for local calls within the same region.
Major Cities and Their Area Codes
Find which area code serves each major city in Oklahoma.
| City / Community | Area Code(s) |
|---|---|
| Enid | 580 |
| Lawton | 580 |
| Oklahoma City | 405 |
| Tulsa | 918 |
How to Call Oklahoma
Within the US: dial 1 + area code + 7-digit number (10-digit dialing applies where overlays are active).
From Canada or the Caribbean: the same NANP format applies — 1 + area code + number.
From abroad: dial your country's exit code (011 from the US, 00 from most countries, or + on mobile), then 1, then the Oklahoma area code and number.
Example (from the UK): 00 1 405 XXX XXXX
Data source: North American Numbering Plan Administration (NANPA), ITU-T E.164. Area code assignments change with new overlays — verify with your carrier before dialing. NANPA