| 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 |
|---|---|---|---|
| 307-645 | Park | Powell, WY | Project Telephone Co. |
| 307-649 | Laramie | Carpenter, WY | Rt Communications |
| 307-650 | Laramie | Cheyenne, WY | Sprint Spectrum L.p. |
| 307-654 | Lincoln | Freedom, WY | Silver Star Telephone Co. |
| 307-655 | Sheridan | Wolf, WY | Qwest Corporation |
| 307-656 | Lincoln | Alpine, WY | Gold Star Communications |
| 307-660 | Campbell | Gillette, WY | New Cingular Wireless PCS |
| 307-663 | Niobrara | Lance Creek, WY | Golden West Tel Coop Inc DBA Golden West Telecomm |
| 307-664 | Big Horn | Deaver, WY | Tct West |
| 307-670 | Campbell | Gillette, WY | Cellco Partnership DBA Verizon Wireless |
| 307-672 | Sheridan | Sheridan, WY | Qwest Corporation |
| 307-673 | Sheridan | Sheridan, WY | Qwest Corporation |
| 307-674 | Sheridan | Sheridan, WY | Qwest Corporation |
| 307-675 | Sheridan | Sheridan, WY | Advanced Communications Technology |
| 307-677 | Uinta | Evanston, WY | Cellco Partnership DBA Verizon Wireless |
| 307-679 | Uinta | Evanston, WY | Cellco Partnership DBA Verizon Wireless |
| 307-680 | Campbell | Gillette, WY | New Cingular Wireless PCS |
| 307-681 | Campbell | Rozet, WY | Advanced Communications Technology |
| 307-682 | Campbell | Gillette, WY | Qwest Corporation |
| 307-683 | Sheridan | Sheridan, WY | Qwest Corporation |
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.