Area code 539
Area code 539 serves Tulsa and nearby parts of Oklahoma, including Broken Arrow, Muskogee and Bartlesville. It is on Central Time, which observes daylight saving time. 918 is an overlay for the same area.
Area code 539 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 | 918 |
Cities in 539
- 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 539 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 539 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 539 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 539 without leaving your CRM
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Other area codes in Oklahoma
Questions about 539
What time zone is area code 539?
Area code 539 is on Central Time. It observes daylight saving time.
Where is area code 539?
Area code 539 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 539 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 539?
918 covers the same area as 539, so numbers in the same town can have either code.