| 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 |
|---|---|---|---|
| 307-922 | Rock Springs | Sweetwater | Landline |
| 307-377 | Shirley Basin | Carbon | Wireless |
| 307-734 | Jackson | Teton | Landline |
| 307-322 | Wheatland | Platte | Landline |
| 307-277 | Casper | Natrona | Wireless |
| 307-716 | Powell | Park | Wireless |
| 307-855 | Riverton | Fremont | Landline |
| 307-699 | Jackson | Teton | Wireless |
| 307-877 | Kemmerer | Lincoln | Landline |
| 307-380 | Baggs | Carbon | Wireless |
| 307-480 | Thermopolis | Hot Springs | Wireless |
| 307-886 | Afton | Lincoln | Landline |
| 307-782 | Lyman | Uinta | Landline |
| 307-350 | Rock Springs | Sweetwater | Wireless |
| 307-468 | Osage | Weston | Landline |
| 307-575 | Torrington | Goshen | Wireless |
| 307-237 | Casper | Natrona | Landline |
| 307-921 | Thermopolis | Hot Springs | Wireless |
| 307-849 | Cokeville | Lincoln | Landline |
| 307-366 | Ten Sleep | Washakie | Landline |