Area Code 307 at a Glance
| Area code | 307 |
| Region | Wyoming |
| Country | United States |
| Primary timezone | America/Denver |
| Dialing format | +1 (307) NXX-XXXX |
Cities and Places Using Area Code 307
Based on prefix-level carrier data, area code 307 covers places including:
- Casper, WY
- Cheyenne, WY
- Jackson, WY
- Gillette, WY
- Sheridan, WY
- Laramie, WY
- Cody, WY
- Rock Springs, WY
- Riverton, WY
- Lander, WY
- Afton, WY
- Rawlins, WY
Frequently Asked Questions
Where is area code 307?
Area code 307 serves Wyoming, United States.
Who is calling me from area code 307?
A call from area code 307 most likely originates from Wyoming, but caller ID can be spoofed. If an unknown caller asks for personal or payment information, hang up and call the organization back on its official number.
How do I dial a 307 number?
Within North America: dial 1-307 followed by the 7-digit number. From abroad: your international prefix (like 00 or +), then 1 307 and the number.