| 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 |
|---|---|---|---|
| 307-422 | Chugwater | Platte | Landline |
| 307-707 | Green River | Sweetwater | Wireless |
| 307-209 | Rock Springs | Sweetwater | Wireless |
| 307-884 | Afton | Lincoln | Wireless |
| 307-779 | Wheatland | Platte | Wireless |
| 307-745 | Laramie | Albany | Landline |
| 307-327 | Encampment | Carbon | Landline |
| 307-444 | Evanston | Uinta | Landline |
| 307-878 | Hulett | Crook | Landline |
| 307-764 | Powell | Park | Landline |
| 307-650 | Cheyenne | Laramie | Wireless |
| 307-401 | Torrington | Goshen | Wireless |
| 307-367 | Pinedale | Sublette | Landline |
| 307-321 | Rawlins | Carbon | Wireless |
| 307-790 | Sundance | Crook | Wireless |
| 307-472 | Casper | Natrona | Landline |
| 307-370 | Rawlins | Carbon | Wireless |
| 307-212 | Rock Springs | Sweetwater | Landline |
| 307-548 | Lovell | Big Horn | Landline |
| 307-752 | Sheridan | Sheridan | Wireless |