| 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 |
|---|---|---|---|
| 307-890 | Freedom | Lincoln | Wireless |
| 307-578 | Cody | Park | Landline |
| 307-364 | Green River | Sweetwater | Landline |
| 307-797 | Shirley Basin | Carbon | Wireless |
| 307-681 | Gillette | Campbell | Landline |
| 307-228 | Gillette | Campbell | Landline |
| 307-258 | Shirley Basin | Carbon | Wireless |
| 307-220 | Cheyenne | Laramie | Wireless |
| 307-851 | Riverton | Fremont | Wireless |
| 307-339 | Hanna | Carbon | Wireless |
| 307-567 | Gillette | Campbell | Wireless |
| 307-755 | Laramie | Albany | Landline |
| 307-899 | Cody | Park | Wireless |
| 307-735 | Glendo | Platte | Landline |
| 307-352 | Rock Springs | Sweetwater | Landline |
| 307-262 | Shirley Basin | Carbon | Wireless |
| 307-746 | Newcastle | Weston | Landline |
| 307-463 | Riverton | Fremont | Landline |
| 307-242 | Yellowstone National Park | Park | Landline |
| 307-654 | Freedom | Lincoln | Landline |