| 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 |
|---|---|---|---|
| 406-575 | Lavina | Golden Valley | Landline |
| 406-772 | Plevna | Fallon | Landline |
| 406-685 | Cardwell | Jefferson | Landline |
| 406-897 | Whitefish | Flathead | Landline |
| 406-600 | Bozeman | Gallatin | Wireless |
| 406-326 | Reed Point | Stillwater | Landline |
| 406-630 | Sidney | Richland | Landline |
| 406-382 | Superior | Mineral | Wireless |
| 406-800 | Bridger | Carbon | Landline |
| 406-893 | Peerless | Daniels | Landline |
| 406-731 | Great Falls | Cascade | Landline |
| 406-357 | Lloyd | Blaine | Landline |
| 406-323 | Roundup | Musselshell | Landline |
| 406-286 | Reserve | Sheridan | Landline |
| 406-441 | Helena | Lewis And Clark | Landline |
| 406-313 | Boulder | Jefferson | Landline |
| 406-651 | Billings | Yellowstone | Landline |
| 406-592 | Busby | Big Horn | Landline |
| 406-260 | Kalispell | Flathead | Wireless |
| 406-751 | Kalispell | Flathead | Landline |