Oklahoma · Central Time
918 Area Code
Area code 918 is in Oklahoma, serving northeastern Oklahoma, including Tulsa, Broken Arrow and Muskogee. It is in the Central Time zone. It shares its territory with overlay code 539, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 918 area code?
918 is a Oklahoma area code covering northeastern Oklahoma, including Tulsa, Broken Arrow and Muskogee. In the wider directory it sits in the South region.
Cities in the 918 area code
- Tulsa
- Broken Arrow
- Owasso
- Muskogee
- Bartlesville
- Bixby
- Jenks
- Sand Springs
- Sapulpa
- Claremore
- Tahlequah
- McAlester
- Glenpool
- Okmulgee
Counties served by 918
Tulsa County, Wagoner County, Rogers County, Muskogee County, Creek County, Washington County, Pittsburg County, Cherokee County, Okmulgee County and Osage County.
918 overlay codes and dialing
The 918 territory is covered by an overlay of 2 area codes: 539, 918. All of them serve the same geographic area, and the original code is 918. Because more than one code covers the same ground, 10-digit dialing is mandatory — you must dial the area code for every local call. New phone lines may be assigned any of these codes.
History of the 918 area code
918 went into service on January 1, 1953. It serves Tulsa and the surrounding part of Oklahoma, and today shares its territory with overlay code 539. For how codes are created, split, and overlaid, see how area codes work.
Is 918 a scam or spam risk?
918 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 918 number on your screen is no guarantee the caller is in Tulsa, OK or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Explore more
See every code in Oklahoma, compare codes across the South region, or view all Central Time codes. You can also browse the 9XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
918 area code FAQ
Where is the 918 area code?
The 918 area code is in Oklahoma, covering northeastern Oklahoma, including Tulsa, Broken Arrow and Muskogee, in the South region.
What cities are in the 918 area code?
Cities in the 918 area code include Tulsa, Broken Arrow, Owasso, Muskogee, Bartlesville, Bixby, Jenks, Sand Springs, Sapulpa and Claremore.
What time zone is 918 in?
918 is in the Central Time zone.
What is the overlay for the 918 area code?
918 shares its territory with 539. Both codes (539, 918) serve the same area, so 10-digit dialing is required for every call.
When did the 918 area code start?
918 went into service on January 1, 1953.
Do I have to dial 10 digits for 918?
Yes. Because 918 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 918 a toll-free or premium code?
No. 918 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.