Area code 307
Area code 307 serves Cheyenne and nearby parts of Wyoming, including Casper, Laramie and Gillette. It is on Mountain Time, which observes daylight saving time.
Area code 307 at a glance
| State | Wyoming (WY) |
| Main city | Cheyenne |
| Time zone | Mountain Time |
| UTC offset | UTC−7 in winter, UTC−6 in summer |
| Daylight saving time | Yes |
Cities in 307
- Cheyenne
- Casper
- Laramie
- Gillette
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 307 number
Federal telemarketing rules under the TCPA allow sales calls between 8 AM and 9 PM in the called person’s local time. Here is that window for a 307 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 307 between |
|---|---|
| Eastern | 10:00 AM to 11:00 PM |
| Central | 9:00 AM to 10:00 PM |
| Mountain | 8:00 AM to 9:00 PM |
| Arizona | 7:00 AM to 8:00 PM |
| Pacific | 7:00 AM to 8:00 PM |
See the time in 307 without leaving your CRM
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Other area codes in Wyoming
307 is the only area code in our list for Wyoming.
Questions about 307
What time zone is area code 307?
Area code 307 is on Mountain Time. It observes daylight saving time.
Where is area code 307?
Area code 307 is in Wyoming. Its main city is Cheyenne, and it also covers Casper, Laramie and Gillette.
What are the legal hours to call a 307 number?
Under the federal TCPA, sales calls are allowed from 8 AM to 9 PM in the called person’s local time. Personal and informational calls are not limited by these hours.