| District of Wyoming area codes: 307 | |
|---|---|
| Country | United States |
| State/Province | Wyoming |
| Major City | Casper |
| Time Zone | Mountain (UTC-07:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 307-520 | Albany | Medicine Bow, WY | Union Telephone Company |
| 307-527 | Park | Cody, WY | Qwest Corporation |
| 307-529 | Laramie | Cheyenne, WY | Ymax Communications Corp. |
| 307-532 | Goshen | Torrington, WY | United Tel Co West - Wy DBA Centurylink West |
| 307-533 | Sheridan | Sheridan, WY | Mtpcs |
| 307-534 | Goshen | Torrington, WY | United Tel Co West - Wy DBA Centurylink West |
| 307-537 | Sublette | Pinedale, WY | Centurytel Of Wyoming DBA Centurylink |
| 307-540 | Fremont | Jeffrey City, WY | Union Telephone Company |
| 307-541 | Teton | Moran, WY | Union Telephone Company |
| 307-543 | Teton | Moran, WY | Qwest Corporation |
| 307-544 | Fremont | Jeffrey City, WY | Rt Communications |
| 307-545 | Teton | Yellowstone National Park, WY | Qwest Corporation |
| 307-547 | Laramie | Burns, WY | Rt Communications |
| 307-548 | Big Horn | Lovell, WY | Tct West |
| 307-549 | Teton | Yellowstone National Park, WY | Union Telephone Company |
| 307-554 | Converse | Glenrock, WY | Zayo Group LLC |
| 307-567 | Campbell | Gillette, WY | Union Telephone Company |
| 307-568 | Big Horn | Basin, WY | Tct West |
| 307-575 | Goshen | Torrington, WY | Cellco Partnership DBA Verizon Wireless |
| 307-576 | Teton | Alta, WY | Columbine Telco DBA Silver Star Communications |
There are 373 prefixes, In the code area, the major cities are Casper, WY;Cheyenne, WY;Gillette, WY;Laramie, WY. The major city is Casper.