Area code 406

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