| General Information about Area Code 406 | |
|---|---|
| Country | United States |
| State / Province / Territory | Montana |
| Major City | Billings |
| Time Zone | Mountain (UTC-07:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 406-793 | Ovando | Powell | Landline |
| 406-946 | Livingston | Park | Landline |
| 406-964 | Vaughn | Cascade | Landline |
| 406-421 | Miles City | Custer | Landline |
| 406-332 | Polson | Lake | Landline |
| 406-210 | Seeley Lake | Missoula | Wireless |
| 406-768 | Poplar | Roosevelt | Landline |
| 406-993 | Ennis | Madison | Landline |
| 406-532 | Missoula | Missoula | Landline |
| 406-212 | Kalispell | Flathead | Wireless |
| 406-991 | Marion | Flathead | Landline |
| 406-475 | Helena | Lewis And Clark | Landline |
| 406-603 | Helena | Lewis And Clark | Landline |
| 406-387 | Whitefish | Flathead | Landline |
| 406-864 | Alberton | Mineral | Landline |
| 406-546 | Missoula | Missoula | Wireless |
| 406-745 | Saint Ignatius | Lake | Landline |
| 406-661 | Billings | Yellowstone | Wireless |
| 406-437 | Helena | Lewis And Clark | Landline |
| 406-607 | Kalispell | Flathead | Landline |