| 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 |
|---|---|---|---|
| 307-527 | Cody | Park | Landline |
| 307-276 | Big Piney | Sublette | Landline |
| 307-554 | Glenrock | Converse | Landline |
| 307-473 | Casper | Natrona | Landline |
| 307-312 | Aladdin | Crook | Landline |
| 307-432 | Cheyenne | Laramie | Landline |
| 307-230 | Shirley Basin | Carbon | Wireless |
| 307-773 | Cheyenne | Laramie | Landline |
| 307-324 | Rawlins | Carbon | Landline |
| 307-537 | Pinedale | Sublette | Landline |
| 307-270 | Cokeville | Lincoln | Wireless |
| 307-721 | Laramie | Albany | Landline |
| 307-854 | Riverton | Fremont | Landline |
| 307-744 | Newcastle | Weston | Wireless |
| 307-290 | Sundance | Crook | Wireless |
| 307-880 | Freedom | Lincoln | Wireless |
| 307-941 | Newcastle | Weston | Wireless |
| 307-275 | Cheyenne | Laramie | Landline |
| 307-637 | Cheyenne | Laramie | Landline |
| 307-200 | Jackson | Teton | Landline |