The 918 area code serves northeastern Oklahoma, anchored by Tulsa, the state’s second-largest city. Created in 1953 when it split from 405, 918 covers the Tulsa metro and the Green Country region, and shares its footprint with the 539 overlay.
Quick Summary of the 918 Area Code
| Area Code | 918 |
| 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 918 area code covers northeastern Oklahoma, centered on Tulsa and its suburbs of Broken Arrow, Owasso, Sand Springs, Sapulpa, and Bixby, and extending north to Bartlesville and southeast to Muskogee. It covers the Green Country region along the Arkansas River near the Kansas, Missouri, and Arkansas borders.
Time Zone
The 918 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 918 number at 11:00 AM local time.
Tip: Business hours across the 918 region generally run 9:00 AM to 5:00 PM Central Time, Monday through Friday.
How to Dial a 918 Number
Because area code 918 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 (918 + 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 918, followed by the seven-digit local number.
Scam Alerts for the 918 Area Code
Like every U.S. area code, 918 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 | Callers impersonating the IRS and threatening arrest over supposed unpaid taxes. |
| Utility Shut-off | Fake PSO callers demanding instant payment to keep your power on. |
| Storm Repair Scam | Fake contractors demanding upfront payment for tornado or storm damage repairs. |
| Bank Fraud Alerts | Robocalls impersonating your bank about “suspicious activity” to phish account details. |
If you receive a suspicious call from a 918 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 918 caller making such a demand is a scammer.
History and Economy of the 918 Region
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Area code 918 was created in 1953, split from 405, to serve northeastern Oklahoma; as the Tulsa metro grew, the 539 overlay was added in 2011 across the same territory. Tulsa was once known as the “Oil Capital of the World,” and although the energy industry has diversified, it remains central to the economy alongside aerospace – Tulsa hosts one of the largest aircraft maintenance bases in the world, operated by American Airlines – as well as manufacturing, healthcare, and higher education at the University of Tulsa. Bartlesville is closely tied to the heritage of Phillips Petroleum, and the region’s celebrated Art Deco architecture reflects its early-20th-century oil-boom wealth.
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Looking Up a 918 Number
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To identify a 918 caller, use a reverse phone lookup or search the full 10-digit number online. Businesses, energy companies, and government offices across northeastern Oklahoma publish their 918 numbers, so a legitimate caller is often easy to confirm with a quick search. For unknown numbers, let the call go to voicemail – genuine callers usually leave a detailed voicemail message, whereas robocallers and automated scam calls almost never bother to do so.
Nearby & Related Area Codes
Oklahoma is served by five area codes. If you are researching 918, these neighboring and overlay codes are worth knowing:
- 539 – Tulsa overlay (same region)
- 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 918 area code located?
The 918 area code covers northeastern Oklahoma, including Tulsa, Broken Arrow, Owasso, Bartlesville, Muskogee, Sand Springs, Sapulpa, and Bixby.
Do I need to dial 10 digits for 918?
Yes. Because 918 shares an overlay with the 539 area code, you must dial all 10 digits for every local call.
What time zone is the 918 area code in?
The 918 area code is in the Central Time Zone (CST/CDT), like all of Oklahoma.
Is 918 the same area as 539?
Yes. 539 is an overlay of 918, so both codes serve the exact same northeastern Oklahoma region.
Related 918 Guides
- Is a 918 call safe? Read Is area code 918 a scam? Spam & safety guide.
- Local coverage: see the Tulsa area code guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.