Montana area code: 406 covers the whole state

Montana area code 406 is the only one in the state, in service since 1947.

Area code number
406
In use since
1947
Local calling areas
260
Local time zone
Mountain time zone
Forecast exhaust
2033
Calling from overseas
Dial +1 406, then the 7-digit number

Data come from NANPA: area code report, rate-centre report, exhaust projections; file dated 11/01/2026. This is not an official NANPA site.

All locations inside the 406 area code

There are 260 rate centres, which are local calling areas:

Yellow Bay, Wyola, Worden, Wolf Point, Wolf Creek, Wise River, Wisdom, Winnett, Winifred, Wilsall, Wibaux, Whitewater, Whitehall, Whitefish, White Sulphur Springs, Westby, West Yellowstone, West Squaw Gap, West Sidney, West Glendive, West Glacier, West Camp Crook, West Beach, Warm Springs, Virginia City, Victor, Valley Industrial Park, Valier, Twin Bridges, Turner, Troy, Townsend, Three Forks, Thompson Falls, Terry, Sweet Grass, Swan Lake, Superior, Sunburst, Stockett, Stevensville, Stanford, South Wolf Point, South Miles City, South Malta, South Havre, South Chester, South Broadus, South Alberton, Somers, Silvertip, Sidney, Sheridan, Shelby, Seeley Lake, Scobey Rural, Scobey, Savage, Saint Regis, Saint Mary, Saint Ignatius, Saco, Ryegate, Rudyard, Roy, Roundup, Rosebud, Ronan, Rock Springs, Ridge, Richey, Reserve, Reedpoint, Red Lodge, Raynesford, Rapelje, Power, Potomac, Poplar, Pompeys Pillar, Polson, Plevna, Plentywood, Plains, Philipsburg, Pendroy, Peerless, Pablo, Ovando, Outlook, Opheim, Olney, Noxon, North Wolf Point, North Ryegate, North Poplar, North Parkman, North Nashua, North Hinsdale, North Havre, North Glasgow, North Frannie, North Cut Bank, North Broadus, Neihart, Nashua, Musselshell, Moore, Molt, Missoula, Miles City, Melville, Melstone, Melrose, Medicine Lake, Martinsdale, Marion, Manhattan, Malta, Loma, Lodge Grass, Livingston, Lindsay, Lincoln, Lima, Libby, Lewistown, Lavina, Laurel, Larslan, Lame Deer, Lambert, Lakeside, Kremlin, Kevin Oilmont, Kalispell, Judith Gap, Jordan, Joplin, Joliet, Jackson, Hysham, Huntley, Hungry Horse, Hot Springs, Hopp Illiad, Hobson, Hinsdale, Hingham, Highwood, Helena, Hays, Havre, Haugan, Harrison, Harlowton, Harlem, Hardin, Hamilton, Great Falls, Grass Range, Grant, Glentana, Glendive, Glasgow, Gildford, Geyser, Geraldine, Gardiner, Gallatin Gateway, Fromberg, Froid Rural, Froid, Frenchtown, Frazer, Fort Smith, Fort Shaw, Fort Peck, Fort Benton, Forsyth, Flaxville Rural, Flaxville, Finley Point, Fallon, Fairview, Fairfield, Eureka Rural, Eureka, Ethridge, Ennis, Elmo, Ekalaka, East Glacier Park, East Conrad, Dutton, Dupuyer, Drummond, Dodson, Dixon, Divide, Dillon, Devon, Denton, Deer Lodge, Decker, Darby, Dagmar, Cut Bank, Custer, Culbertson, Crooked Creek, Cooke City, Conrad, Condon, Columbus, Columbia Falls, Colstrip, Clyde Park, Clinton, Circle, Choteau, Chinook, Chester, Charlo, Cascade, Carter, Carlyle, Canyon Creek, Butte, Busby, Browning, Brockton, Broadview, Broadus, Bridger, Brady, Bozeman, Box Elder, Boulder, Bloomfield, Birney, Billings, Bigfork, Big Timber, Big Sky, Big Sandy, Belt, Belgrade, Belfry, Baker, Bainville, Avon, Augusta, Ashland, Arlee, Anaconda, Alzada, Alta, Alberton, Absarokee.

Where Montana's area code came from

In 1947, 406 counted among the original area codes, and NANPA shows nothing split off from 406.

Will Montana add another area code?

Years away still: NANPA projects the 406 numbers will run out in 2033. Among the 51 states and DC that have a forecast, that is the 18th soonest.

NANPA forecastForecast exhaust
2026.12033 4Q
2025.22032 4Q
2025.12032 4Q
2024.22033 1Q
2024.12032 4Q
2023.22031 2Q

Area codes in the states that border Montana

Montana area code questions

Which area code serves Montana?

406 serves the whole state.

How can I get a number in Montana?

You can get a 406 number from any provider that assigns local numbers. Compare first-year cost

For a local call in Montana, do I dial the area code?

Yes, you do. Within 406, local calls are dialled in 10-digit form, and long-distance calls with 1 + 10-digit dialling. When you call from abroad, start with +1 406.