| 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 |
|---|---|---|---|
| 307-216 | Manville | Niobrara | Wireless |
| 307-690 | Jackson | Teton | Wireless |
| 307-656 | Alpine | Lincoln | Wireless |
| 307-850 | Riverton | Fremont | Wireless |
| 307-576 | Moose | Teton | Landline |
| 307-708 | Evanston | Uinta | Wireless |
| 307-282 | Sundance | Crook | Wireless |
| 307-703 | Laramie | Albany | Wireless |
| 307-224 | Casper | Natrona | Landline |
| 307-286 | Cheyenne | Laramie | Wireless |
| 307-221 | Cheyenne | Laramie | Wireless |
| 307-723 | Kemmerer | Lincoln | Wireless |
| 307-736 | Arvada | Sheridan | Landline |
| 307-464 | Gillette | Campbell | Landline |
| 307-235 | Casper | Natrona | Landline |
| 307-620 | Buffalo | Johnson | Wireless |
| 307-222 | Cheyenne | Laramie | Landline |
| 307-375 | Worland | Washakie | Landline |
| 307-701 | Cheyenne | Laramie | Wireless |
| 307-362 | Rock Springs | Sweetwater | Landline |