| General Information about Area Code 307 | |
|---|---|
| Country | United States |
| State / Province / Territory | Wyoming |
| Major City | Cheyenne |
| Time Zone | Mountain (UTC-07:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 307-742 | Laramie | Albany | Landline |
| 307-509 | Cheyenne | Laramie | Landline |
| 307-587 | Cody | Park | Landline |
| 307-429 | Sheridan | Sheridan | Landline |
| 307-465 | Osage | Weston | Landline |
| 307-727 | Kemmerer | Lincoln | Wireless |
| 307-663 | Lance Creek | Niobrara | Landline |
| 307-254 | Powell | Park | Wireless |
| 307-477 | Cheyenne | Laramie | Wireless |
| 307-272 | Cody | Park | Wireless |
| 307-541 | Moran | Teton | Wireless |
| 307-786 | Lyman | Uinta | Landline |
| 307-788 | Yoder | Goshen | Landline |
| 307-253 | Casper | Natrona | Landline |
| 307-761 | Laramie | Albany | Wireless |
| 307-621 | Buffalo | Johnson | Wireless |
| 307-868 | Meeteetse | Park | Landline |
| 307-486 | Crowheart | Fremont | Landline |
| 307-459 | Cheyenne | Laramie | Landline |
| 307-326 | Encampment | Carbon | Landline |