| 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 |
|---|---|---|---|
| 307-219 | Powell | Park | Landline |
| 307-747 | Lyman | Uinta | Wireless |
| 307-363 | Gillette | Campbell | Landline |
| 307-586 | Cody | Park | Landline |
| 307-649 | Carpenter | Laramie | Landline |
| 307-469 | Hyattville | Big Horn | Landline |
| 307-203 | Jackson | Teton | Wireless |
| 307-280 | Farson | Sweetwater | Wireless |
| 307-685 | Gillette | Campbell | Landline |
| 307-643 | Beulah | Crook | Landline |
| 307-448 | Rock Springs | Sweetwater | Wireless |
| 307-534 | Torrington | Goshen | Landline |
| 307-441 | Casper | Natrona | Landline |
| 307-373 | Greybull | Big Horn | Landline |
| 307-763 | Sheridan | Sheridan | Wireless |
| 307-256 | Cheyenne | Laramie | Wireless |
| 307-789 | Evanston | Uinta | Landline |
| 307-330 | Lander | Fremont | Wireless |
| 307-481 | Lusk | Niobrara | Landline |
| 307-514 | Cheyenne | Laramie | Landline |