| 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 |
|---|---|---|---|
| 307-896 | Aladdin | Crook | Landline |
| 307-206 | Lander | Fremont | Landline |
| 307-338 | Torrington | Goshen | Wireless |
| 307-332 | Lander | Fremont | Landline |
| 307-425 | Buffalo | Johnson | Landline |
| 307-389 | Rock Springs | Sweetwater | Wireless |
| 307-673 | Sheridan | Sheridan | Landline |
| 307-722 | Thermopolis | Hot Springs | Wireless |
| 307-996 | Cheyenne | Laramie | Landline |
| 307-858 | Riverton | Fremont | Wireless |
| 307-271 | Powell | Park | Landline |
| 307-261 | Casper | Natrona | Landline |
| 307-457 | Jeffrey City | Fremont | Landline |
| 307-856 | Riverton | Fremont | Landline |
| 307-765 | Greybull | Big Horn | Landline |
| 307-345 | Lander | Fremont | Wireless |
| 307-299 | Gillette | Campbell | Wireless |
| 307-358 | Douglas | Converse | Landline |
| 307-682 | Gillette | Campbell | Landline |
| 307-640 | Fe Warren Afb | Laramie | Wireless |