| 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 |
|---|---|---|---|
| 307-771 | Cheyenne | Laramie | Landline |
| 307-887 | Afton | Lincoln | Wireless |
| 307-529 | Cheyenne | Laramie | Landline |
| 307-840 | Riverton | Fremont | Wireless |
| 307-354 | Rock Springs | Sweetwater | Wireless |
| 307-714 | Lander | Fremont | Wireless |
| 307-274 | Cheyenne | Laramie | Landline |
| 307-532 | Torrington | Goshen | Landline |
| 307-859 | Pinedale | Sublette | Landline |
| 307-545 | Yellowstone National Park | Park | Landline |
| 307-635 | Cheyenne | Laramie | Landline |
| 307-251 | Casper | Natrona | Wireless |
| 307-265 | Casper | Natrona | Landline |
| 307-437 | Midwest | Natrona | Landline |
| 307-687 | Gillette | Campbell | Landline |
| 307-995 | Casper | Natrona | Landline |
| 307-834 | Hawk Springs | Goshen | Landline |
| 307-638 | Cheyenne | Laramie | Landline |
| 307-672 | Sheridan | Sheridan | Landline |
| 307-750 | Sheridan | Sheridan | Landline |