The 539 area code is an overlay serving northeastern Oklahoma, including Tulsa and the Green Country region. Introduced in 2011, it was layered directly on top of the established 918 area code to supply fresh phone numbers across the Tulsa metropolitan area.
Quick Summary of the 539 Area Code
| Area Code | 539 |
| State | Oklahoma (OK) |
| Region | Northeastern Oklahoma (Tulsa Metro) |
| Major Cities | Tulsa, Broken Arrow, Owasso, Bartlesville, Muskogee, Sand Springs, Sapulpa, Bixby |
| Time Zone | Central Time (CT) – CST / CDT |
| Dialing Format | 10-digit dialing required |
Geographic Coverage
The 539 area code shares an identical footprint with 918, covering Tulsa and its suburbs of Broken Arrow, Owasso, Sand Springs, Sapulpa, and Bixby, along with Bartlesville to the north and Muskogee to the southeast. Because it is an overlay rather than a separate region, a 539 number and a 918 number can exist on the same street.
Time Zone
The 539 area code observes Central Time (CT). Clocks follow Central Standard Time (UTC−6) in winter and shift to Central Daylight Time (UTC−5) from mid-March through early November. All of Oklahoma is on Central Time. From the West Coast, this region is two hours ahead of Pacific Time, so a 9:00 AM call in California reaches a 539 number at 11:00 AM local time.
Tip: Business hours across the 539 region generally run 9:00 AM to 5:00 PM Central Time, Monday through Friday.
How to Dial a 539 Number
Because area code 539 operates as part of an overlay, 10-digit dialing is mandatory for every local and long-distance call. You must dial the full 10-digit number (539 + the seven-digit line number) even when calling a neighbor across the street. For international callers, dial your country’s exit code, then +1 (the North American country code), then 539, followed by the seven-digit local number.
Scam Alerts for the 539 Area Code
Like every U.S. area code, 539 has been used by scammers who spoof local numbers to appear trustworthy. Residents in Tulsa, Broken Arrow, Owasso, Bartlesville, Muskogee, Sand Springs, Sapulpa, Bixby should stay alert to the following common tactics:
| Scam Type | What to Watch For |
|---|---|
| IRS / Tax Scams | Threatening calls demanding immediate tax payment via gift cards or wire transfer. |
| Utility Shut-off | Impostors claiming to be PSO threatening to cut power unless you pay now. |
| Storm Repair Scam | Fake contractors demanding upfront payment for tornado or storm damage repairs. |
| Tech Support Fraud | Pop-ups or calls claiming your computer is infected and asking for remote access. |
If you receive a suspicious call from a 539 number, take these steps to protect yourself:
- Do not share personal information such as Social Security numbers, bank details, or passwords over the phone.
- Hang up and verify by calling the organization back using an official number from its website.
- Report the call to the FTC at reportfraud.ftc.gov and to the Oklahoma Attorney General’s Office.
- Block the number and consider registering with the National Do Not Call Registry.
Red Flag: Legitimate agencies such as the IRS, Social Security Administration, or your local utility company (OG&E or PSO) will never demand immediate payment by gift card, wire transfer, or cryptocurrency. Any 539 caller making such a demand is a scammer.
History and Economy of the 539 Region
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The 539 area code entered service in 2011 as an overlay for the entire 918 region. Overlays let regulators add a fresh supply of phone numbers to a crowded area without forcing existing customers to change their established numbers, so 539 covers precisely the same cities as 918. The regional economy centers on Tulsa, the historic “Oil Capital of the World,” which today blends a diversified energy sector with one of the largest aircraft-maintenance bases in the world, operated by American Airlines, along with manufacturing, healthcare, and higher education at the University of Tulsa. Bartlesville carries the legacy of Phillips Petroleum, and the region’s Art Deco heritage reflects its oil-boom history. Because 539 is the newer of the two Tulsa codes, it appears most often on recently activated mobile numbers and new business lines.
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Looking Up a 539 Number
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To identify a 539 caller, use a reverse phone lookup or search the complete 10-digit number online. Because 539 is a newer code often used for mobile numbers, some callers may have a smaller public footprint, so never share personal or financial details with an unverified caller.
Nearby & Related Area Codes
Oklahoma is served by five area codes. If you are researching 539, these neighboring and overlay codes are worth knowing:
- 918 – Tulsa (overlay partner)
- 405 – Greater Oklahoma City Metro
- 572 – Oklahoma City overlay
- 580 – Western & Southern OK / Enid & Lawton
You can also browse our full directory of Oklahoma area codes for more regional guides.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border Oklahoma:
- Kansas – area code 316
- Missouri – area code 314
- Arkansas – area code 501
- Texas – area code 214
- New Mexico – area code 505
- Colorado – area code 303
Frequently Asked Questions
Where is the 539 area code located?
The 539 area code serves northeastern Oklahoma as an overlay of 918, covering Tulsa, Broken Arrow, Owasso, Bartlesville, Muskogee, Sand Springs, and Sapulpa.
Why does 539 cover the same area as 918?
539 is an overlay added in 2011 because the 918 region ran short of available phone numbers. Both codes serve the exact same geographic area.
Do I have to dial 10 digits for 539?
Yes. Overlay area codes like 539 always require 10-digit dialing for local calls.
Is the 539 area code Central Time?
Yes, the 539 area code follows Central Time (CST/CDT), like all of Oklahoma.
Related 539 Guides
- Is a 539 call safe? Read Is area code 539 a scam? Spam & safety guide.
- Local coverage: see the Tulsa area code guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.