MONTANA
| Area Code | Ratecenter | Tier |
|---|
| 406 | BELGRADE | 1 |
| 406 | BILLINGS | 1 |
| 406 | BOULDER | 1 |
| 406 | BOZEMAN | 1 |
| 406 | BRIDGER | 1 |
| 406 | BUTTE | 1 |
| 406 | CASCADE | 1 |
| 406 | CLYDE PARK | 1 |
| 406 | COLSTRIP | 1 |
| 406 | COLUMBUS | 1 |
| 406 | CONRAD | 1 |
| 406 | COOKE CITY | 1 |
| 406 | CUT BANK | 1 |
| 406 | DARBY | 1 |
| 406 | DEER LODGE | 1 |
| 406 | DILLON | 1 |
| 406 | DUTTON | 1 |
| 406 | EGLACIERPK | 1 |
| 406 | FAIRVIEW | 1 |
| 406 | FORSYTH | 1 |
| 406 | FRENCHTOWN | 1 |
| 406 | FROMBERG | 1 |
| 406 | GALATNGTWY | 1 |
| 406 | GARDINER | 1 |
| 406 | GLENDIVE | 1 |
| 406 | GREATFALLS | 1 |
| 406 | HAMILTON | 1 |
| 406 | HARDIN | 1 |
| 406 | HAVRE | 1 |
| 406 | HELENA | 1 |
| 406 | JOLIET | 1 |
| 406 | LAUREL | 1 |
| 406 | LEWISTOWN | 1 |
| 406 | LIVINGSTON | 1 |
| 406 | MANHATTAN | 1 |
| 406 | MILES CITY | 1 |
| 406 | MISSOULA | 1 |
| 406 | RED LODGE | 2 |
| 406 | SHELBY | 1 |
| 406 | SIDNEY | 1 |
| 406 | ST MARY | 1 |
| 406 | STEVENSVL | 1 |
| 406 | TERRY | 1 |
| 406 | THREEFORKS | 1 |
| 406 | TOWNSEND | 1 |
| 406 | VICTOR | 1 |
| 406 | W GLACIER | 1 |
| 406 | WARM SPG | 1 |
| 406 | WHITEHALL | 1 |
| 406 | WIBAUX | 1 |
| 406 | WILSALL | 1 |
| 406 | WOLF CREEK | 1 |
| 406 | WYELLOWSTN | 1 |