| 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 |
|---|---|---|---|
| 307-328 | Rawlins | Carbon | Landline |
| 307-214 | Cheyenne | Laramie | Wireless |
| 307-630 | Cheyenne | Laramie | Wireless |
| 307-689 | Gillette | Campbell | Wireless |
| 307-629 | Newcastle | Weston | Wireless |
| 307-872 | Green River | Sweetwater | Landline |
| 307-250 | Cody | Park | Wireless |
| 307-717 | Douglas | Converse | Wireless |
| 307-325 | Hanna | Carbon | Landline |
| 307-309 | Glenrock | Converse | Wireless |
| 307-297 | Green River | Sweetwater | Wireless |
| 307-278 | Buffalo | Johnson | Landline |
| 307-829 | Cheyenne | Laramie | Landline |
| 307-247 | Shirley Basin | Carbon | Wireless |
| 307-379 | Medicine Bow | Carbon | Landline |
| 307-349 | Lander | Fremont | Wireless |
| 307-520 | Medicine Bow | Carbon | Wireless |
| 307-266 | Casper | Natrona | Landline |
| 307-392 | Cokeville | Lincoln | Landline |
| 307-939 | Gillette | Campbell | Landline |