| 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 |
|---|---|---|---|
| 307-382 | Rock Springs | Sweetwater | Landline |
| 307-233 | Casper | Natrona | Landline |
| 307-436 | Glenrock | Converse | Landline |
| 307-223 | Laramie | Albany | Landline |
| 307-732 | Jackson | Teton | Landline |
| 307-533 | Sheridan | Sheridan | Landline |
| 307-431 | Worland | Washakie | Wireless |
| 307-341 | Parkman | Sheridan | Landline |
| 307-741 | Glenrock | Converse | Wireless |
| 307-353 | Moose | Teton | Landline |
| 307-749 | Pinedale | Sublette | Wireless |
| 307-686 | Gillette | Campbell | Landline |
| 307-450 | Dubois | Fremont | Wireless |
| 307-710 | Rawlins | Carbon | Wireless |
| 307-713 | Jackson | Teton | Wireless |
| 307-273 | Farson | Sweetwater | Landline |
| 307-264 | Jackson | Teton | Wireless |
| 307-645 | Powell | Park | Landline |
| 307-800 | Kemmerer | Lincoln | Landline |
| 307-920 | Cheyenne | Laramie | Wireless |