Area code 918
Area code 918 serves Tulsa and nearby parts of Oklahoma, including Broken Arrow, Muskogee and Bartlesville. It is on Central Time, which observes daylight saving time. 539 is an overlay for the same area.
Area code 918 at a glance
| State | Oklahoma (OK) |
| Main city | Tulsa |
| Time zone | Central Time |
| UTC offset | UTC−6 in winter, UTC−5 in summer |
| Daylight saving time | Yes |
| Overlay codes | 539 |
Cities in 918
- Tulsa
- Broken Arrow
- Muskogee
- Bartlesville
An area code shows where a number was first assigned. Mobile numbers keep their area code when people move, so the person you’re calling may be somewhere else.
When you can call a 918 number
Federal telemarketing rules under the TCPA allow sales calls between 8 AM and 9 PM in the called person’s local time. Oklahoma law is stricter and ends the window at 8 PM. Here is that window for a 918 number, shown in your own time zone.
General information, not legal advice. Some states add rules for Sundays, holidays or the number of calls. See our calling hours guide.
| If you’re on | You can call 918 between |
|---|---|
| Eastern | 9:00 AM to 9:00 PM |
| Central | 8:00 AM to 8:00 PM |
| Mountain | 7:00 AM to 7:00 PM |
| Arizona | 6:00 AM to 6:00 PM |
| Pacific | 6:00 AM to 6:00 PM |
See the time in 918 without leaving your CRM
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Other area codes in Oklahoma
Questions about 918
What time zone is area code 918?
Area code 918 is on Central Time. It observes daylight saving time.
Where is area code 918?
Area code 918 is in Oklahoma. Its main city is Tulsa, and it also covers Broken Arrow, Muskogee and Bartlesville.
What are the legal hours to call a 918 number?
Under the federal TCPA, sales calls are allowed from 8 AM to 8 PM under Oklahoma law in the called person’s local time. Personal and informational calls are not limited by these hours.
What area codes overlay 918?
539 covers the same area as 918, so numbers in the same town can have either code.