Wyoming Area Codes
Data last updated: June 25, 2026
Area Codes in Wyoming
| NPA | Major Cities | Status | Exchanges | Overlay |
|---|---|---|---|---|
| 307 | Cheyenne, Casper, Basin | Active | 774 | No |
Top Carriers in Wyoming
| Carrier | OCN | NXX Count |
|---|---|---|
| QWEST CORPORATION | 9636 | 81 |
| UNION TELEPHONE COMPANY | 013B | 65 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | 60 |
| NEW CINGULAR WIRELESS PCS, LLC | 6010 | 49 |
| ONVOY, LLC - WY | 450F | 40 |
| LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | 27 |
| BANDWIDTH.COM CLEC, LLC - WY | 081F | 19 |
| RT COMMUNICATIONS | 3410 | 17 |
| T-MOBILE USA, INC. | 6529 | 14 |
| UNION TEL. CO. | 2297 | 11 |