Image:Area_code_MT.png, Map of Montana area code in blue (with border states and provinces) poly 67 33 0 20 1 1 51 0 58 24 Area code 250 poly 66 33 57 25 52 0 198 0 198 54

Area code 403 Area code 403 is a telephone area code in the North American Numbering Plan (NANP) for the Canadian province of Alberta. The numbering plan area encompasses the southern third of the province, which includes the Calgary area. This numbering plan a ...

poly 198 55 198 0 419 0 418 72 265 63

Area code 306 Area is the quantity that expresses the extent of a region on the plane or on a curved surface. The area of a plane region or ''plane area'' refers to the area of a shape or planar lamina, while ''surface area'' refers to the area of an open su ...

poly 373 71 419 71 419 212 364 210 Area code 701 poly 364 212 363 267 419 267 419 212 Area code 605 poly 140 233 133 268 363 269 362 255 Area code 307 poly 1 21 15 23 6 70 12 85 12 99 37 137 47 141 36 165 39 178 31 179 32 187 35 195 51 188 58 216 65 222 60 221 61 230 71 230 71 248 77 254 79 247 92 253 93 246 110 250 121 250 125 243 130 256 135 259 134 268 1 267 Area codes 208 and 986 desc top-right Area code 406 is the telephone

area code A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, rea ...

covering the entire state of Montana. It has been Montana's only area code since area codes were created in 1947. As of 2013, there were 1.7 million lines served by 47 carriers; all but two wireline providers support local number portability (the exceptions are small rural independents Hot Springs Telephone Company and Northern Telephone Cooperative). Sufficient available codes for new exchanges in the 406 area code exist to meet anticipated demand until 2027; number pooling has been implemented in response to increased demand and inefficient use of 406 numbering resources. Prior to October 2021, area code 406 had telephone numbers assigned for the central office code 988. In 2020, ''988'' was designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which created a conflict for exchanges that permit seven-digit dialing. This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021.

Exchanges in area code 406

Absarokee Absarokee ( ) is a census-designated place (CDP) in Stillwater County, Montana, United States, approximately south of Columbus on Highway 78. It is named after the Crow Indians who formerly inhabited the land. The population was 1,234 at the ...

: 328, 985 * Alberton: 722 *

Alta Alta or ALTA may refer to: Acronyms * Alt-A, short for Alternative A-paper, is a type of U.S. mortgage * American Land Title Association, a national trade association representing the land title industry * American Literary Translators Associatio ...

: 349 *

Alzada Alzada (also known as Stoneville and Telegraph Point) is a census-designated place in southern Carter County, Montana, United States. As of the 2010 census it had a population of 29. It is located at the intersection of U.S. Route 212 with Monta ...

: 828, 938 * Anaconda: 559, 560, 563, 691, 797 *

Arlee Arlee (Salish: nɫq̓alqʷ, nɫq̓a ) is an unincorporated community and census-designated place (CDP) in Lake County, Montana, United States. The population was 636 at the 2010 census. It is named after Alee, a Salish chief. The chief's name ha ...

: 726 * Ashland: 784, 983 * Augusta: 562 *

Avon Avon may refer to: * River Avon (disambiguation), several rivers Organisations *Avon Buses, a bus operating company in Wirral, England *Avon Coachworks, a car body builder established in 1919 at Warwick, England, relaunched in 1922, following ...

: 492 * Bainville: 769 *

Baker A baker is a tradesperson who bakes and sometimes sells breads and other products made of flour by using an oven or other concentrated heat source. The place where a baker works is called a bakery. History Ancient history Since grains ha ...

: 778, 891, 956, 978 * Belfry: 664 *

Belgrade Belgrade ( , ;, ; Names of European cities in different languages: B, names in other languages) is the Capital city, capital and List of cities in Serbia, largest city in Serbia. It is located at the confluence of the Sava and Danube rivers a ...

: 388, 813, 924 * Belt: 277 * Bigfork: 420, 837 * Big Sandy: 378 * Big Sky: 993, 995, 999 * Big Timber: 930, 931, 932, 936 * Billings: 200, 206, 208, 237, 238, 245, 247, 248, 252, 254, 255, 256, 259, 272, 281, 294, 318, 325, 371, 373, 384, 435, 534, 545, 591, 598, 601, 606, 620, 647, 651, 652, 655, 656, 657, 661, 670, 671, 672, 690, 694, 696, 697, 698, 702, 794, 839, 850, 855, 860, 861, 867, 869, 876, 894, 896, 927, 969 * Birney: 984 * Bloomfield: 583 *

Boulder In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In c ...

: 225, 313 * Box Elder: 352 *

Bozeman Bozeman is a city and the county seat of Gallatin County, Montana, United States. Located in southwest Montana, the 2020 census put Bozeman's population at 53,293, making it the fourth-largest city in Montana. It is the principal city of th ...

: 209, 219, 312, 404, 414, 451, 522, 539, 548, 551, 556, 570, 577, 579, 580, 581, 582, 585, 586, 587, 589, 595, 599, 600, 602, 624, 898, 916, 920, 922, 994 * Brady: 753 * Bridger: 662, 800 * Broadus: 436, 935 * Broadview: 667 * Brockton: 786 * Browning: 338, 573 * Busby: 592 * Butte: 221, 299, 310, 479, 490, 491, 494, 496, 497, 498, 533, 565, 593, 723, 782, 792 * Canyon Creek: 368 *

Carlyle Carlyle may refer to: Places * Carlyle, Illinois, a US city * Carlyle, Kansas, an unincorporated place in the US * Carlyle, Montana, a ghost town in the US * Carlyle, Saskatchewan, a Canadian town ** Carlyle Airport ** Carlyle station * Carly ...

: 588 * Carter: 734 *

Cascade Cascade, Cascades or Cascading may refer to: Science and technology Science *Cascade waterfalls, or series of waterfalls * Cascade, the CRISPR-associated complex for antiviral defense (a protein complex) * Cascade (grape), a type of fruit * Bioc ...

: 468 * Charlo: 644 *

Chester Chester is a cathedral city and the county town of Cheshire, England. It is located on the River Dee, close to the English–Welsh border. With a population of 79,645 in 2011,"2011 Census results: People and Population Profile: Chester Loca ...

: 759 * Chinook: 357 *

Choteau Choteau is a city in and the county seat of Teton County, Montana, United States. It lies along U.S. Routes 89 and 287, (the latter terminating at the former in this city) approximately east of the Rocky Mountains, near Flathead National Fo ...

: 466 *

Circle A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. Equivalently, it is the curve traced out by a point that moves in a plane so that its distance from a given point is const ...

: 485, 974 *

Clinton Clinton is an English toponymic surname, indicating one's ancestors came from English places called Glympton or Glinton.Hanks, P. & Hodges, F. ''A Dictionary of Surnames''. Oxford University Press, 1988 Clinton has frequently been used as a given ...

: 330, 825 * Clyde Park: 686 *

Colstrip Colstrip is a city in Rosebud County, Montana, Rosebud County, Montana, United States. The population was 2,096 at the 2020 United States Census, 2020 census. Established in 1924 and incorporated as a city in 1998, Colstrip is the largest city in ...

: 213, 720, 740, 748, 749 * Columbia Falls: 892, 897 *

Columbus Columbus is a Latinized version of the Italian surname "''Colombo''". It most commonly refers to: * Christopher Columbus (1451-1506), the Italian explorer * Columbus, Ohio, capital of the U.S. state of Ohio Columbus may also refer to: Places ...

: 290, 298, 321, 322, 780 * Condon: 754 *

Conrad Conrad may refer to: People * Conrad (name) Places United States * Conrad, Illinois, an unincorporated community * Conrad, Indiana, an unincorporated community * Conrad, Iowa, a city * Conrad, Montana, a city * Conrad Glacier, Washington ...

: 271, 278, 289, 505, 576 *

Cooke City Cooke City is an unincorporated community and census-designated place (CDP) in Park County, Montana, United States. As of the 2010 census, it had a population of 75. Prior to 2010, it was part of the Cooke City-Silver Gate CDP. The community si ...

: 838 * Crooked Creek: 484 * Culbertson: 514, 787, 790 * Custer: 856 *

Cut Bank A cut bank, also known as a river cliff or river-cut cliff, is the outside bank of a curve or meander in a water channel (stream), which is continually undergoing erosion.Essentials of Geology, 3rd Ed, Stephen Marshak Cut banks are found in abu ...

: 229, 391, 845, 873 * Dagmar: 483 * Darby: 821 * Decker: 757 * Deer Lodge: 415, 645, 846 * Denton: 567 * Devon: 432 * Dillon: 596, 660, 683, 865, 925, 960, 988 * Divide: 267, 553 *

Dixon Dixon may refer to: Places International * Dixon Entrance, part of the Inside Passage between Alaska and British Columbia Canada * Dixon, Ontario United States * Dixon, California * Dixon, Illinois * Dixon, Greene County, Indiana * Dixon, Indi ...

: 246 * Dodson: 383 * Drummond: 288 * Dupuyer: 472 * Dutton: 476 * East

: 627 * East Glacier Park: 226 * Ekalaka: 775, 975 * Elmo: 631, 849 *

Ennis Ennis () is the county town of County Clare, in the mid-west of Ireland. The town lies on the River Fergus, north of where the river widens and enters the Shannon Estuary. Ennis is the largest town in County Clare, with a population of 25,27 ...

: 682 * Ethridge: 339 * Eureka: 296 * Eureka rural: 297, 882, 889 * Fairfield: 467 * Fairview: 742, 747 * Fallon: 486 * Finley Point: 571, 887 * Flaxville: 474 * Flaxville rural: 779 *

Forsyth Forsyth may refer to: Places Oceania * Forsyth Island, Queensland, Australia, one of the West Wellesley Islands (aka Forsyth Islands) * Forsyth Island, Tasmania, Australia * Forsyth Island (New Zealand), in the outer Marlborough Sounds of South Isl ...

: 201, 346, 351, 356, 729 * Fort Benton: 621, 622 * Fort Peck: 526 * Fort Shaw: 264 * Fort Smith: 666 * Frazer: 695 * Frenchtown: 508, 626 *

Froid Froid is a town in Roosevelt County, Montana, United States. The population was 195 at the 2020 census. Froid was named for the French word for "cold". History The land that is now Froid was homesteaded by James and Alice Baker, and who erected ...

: 766 *

rural: 963 * Fromberg: 668 * Gallatin Gateway: 518, 763 *

Gardiner Gardiner may refer to: Places Settlements ;Canada * Gardiner, Ontario ;United States * Gardiner, Maine * Gardiner, Montana * Gardiner (town), New York ** Gardiner (CDP), New York * Gardiner, Oregon * Gardiner, Washington * West Gardiner, Maine ...

: 848 *

Geraldine Geraldine may refer to: People * Geraldine (name), the feminine form of the first name Gerald, with list of people thus named. * The Geraldines, Irish dynasty descended from the Anglo-Norman Gerald FitzWalter de Windsor * Geraldine of Albania, th ...

: 737 *

Geyser A geyser (, ) is a spring characterized by an intermittent discharge of water ejected turbulently and accompanied by steam. As a fairly rare phenomenon, the formation of geysers is due to particular hydrogeological conditions that exist only in ...

: 735 * Gildford: 376 * Glasgow: 228, 230, 263, 831, 942 * Glendive: 345, 359, 365, 377, 948, 987 *

Glentana Glentana is a village on the Indian Ocean coast to the southwest of George in the Western Cape province of South Africa. The village was established in the early 20th century, when the first houses in the area were built. The origin of the tow ...

: 724 * Grant: 681 * Grass Range: 428, 928 * Great Falls: 205, 216, 217, 231, 268, 315, 403, 452, 453, 454, 455, 564, 590, 604, 727, 731, 750, 760, 761, 770, 771, 781, 788, 791, 799, 836, 866, 868, 870, 878, 899, 923, 952, 964, 965 * Hamilton: 360, 361, 363, 369, 375, 381, 802, 961 * Hardin: 623, 629, 638, 665, 679, 699, 953 * Harlem: 353 * Harlowton: 632 * Harrison: 685 * Haugan: 678 * Havre: 262, 265, 808, 879, 945 * Hays: 673 *

Helena Helena may refer to: People *Helena (given name), a given name (including a list of people and characters with the name) *Katri Helena (born 1945), Finnish singer *Helena, mother of Constantine I Places Greece * Helena (island) Guyana * ...

: 202, 204, 227, 324, 389, 410, 417, 422, 430, 431, 437, 438, 439, 440, 441, 442, 443, 444, 447, 449, 457, 458, 459, 461, 465, 475, 495, 502, 513, 555, 558, 594, 603, 634, 841, 933, 992, 996 * Highwood: 733 * Hingham: 397 * Hinsdale: 364 * Hobson: 423 * Hopp Illiad: 386 *

Hot Springs A hot spring, hydrothermal spring, or geothermal spring is a spring produced by the emergence of geothermally heated groundwater onto the surface of the Earth. The groundwater is heated either by shallow bodies of magma (molten rock) or by circ ...

: 741 * Hungry Horse: 387, 929 * Huntley: 348 * Hysham: 342 * Jackson: 834 * Joliet: 905, 962 * Joplin: 292 * Jordan: 557, 977 * Judith Gap: 473 *

Kalispell Kalispell (, Montana Salish: Ql̓ispé, Kutenai language: kqayaqawakⱡuʔnam) is a city in, and the county seat of, Flathead County, Montana, United States. The 2020 census put Kalispell's population at 24,558. In Montana's northwest region, ...

: 212, 249, 250, 253, 257, 260, 261, 270, 300, 309, 314, 407, 471, 607, 751, 752, 755, 756, 758, 858, 871, 885, 890 * Kevin-Oilmont: 337 *

Kremlin The Kremlin ( rus, Московский Кремль, r=Moskovskiy Kreml', p=ˈmɐˈskofskʲɪj krʲemlʲ, t=Moscow Kremlin) is a fortified complex in the center of Moscow founded by the Rurik dynasty, Rurik dynasty. It is the best known of th ...

: 372 *

Lakeside Lakeside or Lake Side may refer to: Places Australia * Lakeside College, Pakenham, Victoria * Lakeside Joondalup Shopping City, Joondalup, Western Australia * Lakeside, near Reservoir, Victoria * Lakeside International Raceway, Pine Rivers, Quee ...

: 709, 844 *

Lambert Lambert may refer to People *Lambert (name), a given name and surname * Lambert, Bishop of Ostia (c. 1036–1130), became Pope Honorius II *Lambert, Margrave of Tuscany ( fl. 929–931), also count and duke of Lucca *Lambert (pianist), stage-name ...

: 774, 914 * Lame Deer: 477 * Larslan: 725 * Laurel: 530, 628, 633, 743, 812 * Lavina: 636 * Lewistown: 350, 366, 380, 535, 538, 707, 708, 968 *

Libby Libby as a feminine given name is typically a diminutive form of Elizabeth, which is less commonly spelled 'Libbie' or ' Libi'. In recent years, it has been used as a shortened version of the name Liberty. As a surname, it can also be spelled ' ...

: 283, 291, 293, 334, 400 * Lima: 276, 340 * Lincoln: 362 * Lindsay: 584 * Livingston: 220, 222, 223, 224, 333, 823, 946 * Lodge Grass: 639 *

Loma Loma may refer to: Geography United States * Loma, Colorado * Loma, Montana * Loma, Nebraska * Loma, North Dakota Other countries * Loma, Ladakh, a town in Ladakh, India * Loma (woreda), a district in Southern Nations, Nationalities, and People ...

: 739 * Malta: 301, 654, 680 * Manhattan: 282, 284 * Marion: 854, 991 * Martinsdale: 572 * Medicine Lake: 789 *

Melrose Melrose may refer to: Places United Kingdom * Melrose, Scottish Borders, a town in the Scottish Borders, Scotland ** Melrose Abbey, ruined monastery ** Melrose RFC, rugby club Australia * Melrose, Queensland, a locality in the South Burnet ...

: 835 * Melstone: 358 * Melville: 537 * Miles City: 232, 233, 234, 851, 852, 853, 874, 934, 944, 951 * Missoula: 203, 207, 214, 215, 218, 239, 240, 241, 243, 251, 258, 273, 274, 303, 317, 327, 329, 370, 396, 493, 523, 529, 531, 532, 540, 541, 542, 543, 544, 546, 549, 550, 552, 721, 728, 829, 830, 880, 926 * Molt: 669 *

Moore Moore may refer to: People * Moore (surname) ** List of people with surname Moore * Moore Crosthwaite (1907–1989), a British diplomat and ambassador * Moore Disney (1765–1846), a senior officer in the British Army * Moore Powell (died c. 1573 ...

: 374 * Musselshell: 947 * Nashua: 746 *

Neihart Neihart is a town in Cascade County, Montana, United States. It is located in the center of Little Belt Mountains.Fifer, p. 77. The population was 43 at the 2020 census. It is part of the Great Falls, Montana, Metropolitan Statistical Area. Geo ...

: 236 * North Broadus: 554 * North Cut Bank: 336 * North Frannie: 764 * North Glasgow: 367 * North Hinsdale: 648 * North Nashua: 785 * North Parkman: 643, 659 * North Poplar: 448 * North Havre: 394, 398 * North Ryegate: 575 * North Wolf Point: 392 * Noxon: 847 *

Olney Olney may refer to: Places Australia * Olney Parish, New South Wales England * Olney, Buckinghamshire, a town near Milton Keynes, England United States * Olney, Alabama * Olney, Georgia - see List of places in Georgia (U.S. state) (I–R) * Ol ...

: 820, 881 * Opheim: 762 * Outlook: 895 * Ovando: 793 * Pablo: 275, 332, 675 *

Peerless Peerless may refer to: Companies and organizations * Peerless Motor Company, an American automobile manufacturer. * Peerless Brewing Company, in Birkenhead, UK * Peerless Group, an insurance and financial services company in India * Peerless Reco ...

: 893 * Pendroy: 469 * Philipsburg: 859 * Plains: 826 * Plentywood: 765 * Plevna: 772, 971 * Polson: 319, 872, 883, 884 * Pompey's Pillar: 875 * Poplar: 768 * Potomac: 244 * Power: 463 * Rapelje: 663 * Raynesford: 738 * Red Lodge: 425, 426, 445, 446, 818 * Reed Point: 326 * Reserve: 286 * Richey: 773, 979 *

Ridge A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The line ...

: 767 * Rock Springs: 354 * Ronan: 528, 676, 833 * Rosebud: 347 *

Roundup A roundup is a systematic gathering together of people or things. Roundup, Round Up or Round-up may also refer to: Agriculture * A muster (livestock) (AU/NZ) or a roundup (US/CA) is the process of gathering livestock. * Roundup (herbicide), a M ...

: 320, 323, 331, 913 * Roy: 464, 954 * Rudyard: 355 * Ryegate: 568 * Saco: 527 * Saint Ignatius: 744, 745, 824 *

Saint Mary Mary; arc, ܡܪܝܡ, translit=Mariam; ar, مريم, translit=Maryam; grc, Μαρία, translit=María; la, Maria; cop, Ⲙⲁⲣⲓⲁ, translit=Maria was a first-century Jewish woman of Nazareth, the wife of Joseph and the mother of ...

: 732 * Savage: 776 * Scobey: 487, 688 * Scobey rural: 783 * Seeley Lake: 210, 499, 677 * Shelby: 424, 434, 450, 460, 470, 597, 966 *

Sheridan Sheridan may refer to: People Surname *Sheridan (surname) *Philip Sheridan (1831–1888), U.S. Army general after whom the Sheridan tank is named *Richard Brinsley Sheridan (1751–1816), Irish playwright (''The Rivals''), poet and politician ...

: 842 *

Sidney Sidney may refer to: People * Sidney (surname), English surname * Sidney (given name), including a list of people with the given name * Sidney (footballer, born 1972), full name Sidney da Silva Souza, Brazilian football defensive midfielder * ...

: 433, 478, 480, 482, 488, 489, 630, 943, 973 * Silvertip: 574, 840 * Somers: 393, 857 * South Alberton: 864 * South Broadus: 427 * South Chester: 456 * South Miles City: 421, 981 * South Havre: 390, 395, 399 * South Malta: 658 * South Wolf Point: 525, 915 *

Stanford Stanford University, officially Leland Stanford Junior University, is a private research university in Stanford, California. The campus occupies , among the largest in the United States, and enrolls over 17,000 students. Stanford is considere ...

: 566 * Stevensville: 625, 777 * Stockett: 736 * Saint Regis: 269, 280, 649 *

Sunburst A sunburst is a design or figure commonly used in architectural ornaments and design patterns and possibly pattern books. It consists of rays or "beams" radiating out from a central disk in the manner of sunbeams. Sometimes part of a sunbur ...

: 561, 937 *

Superior Superior may refer to: *Superior (hierarchy), something which is higher in a hierarchical structure of any kind Places *Superior (proposed U.S. state), an unsuccessful proposal for the Upper Peninsula of Michigan to form a separate state *Lake ...

: 382, 515, 822 *

Swan Lake ''Swan Lake'' ( rus, Лебеди́ное о́зеро, r=Lebedínoye ózero, p=lʲɪbʲɪˈdʲinəjə ˈozʲɪrə, link=no ), Op. 20, is a ballet composed by Russian composer Pyotr Ilyich Tchaikovsky in 1875–76. Despite its initial failur ...

: 612, 886 * Sweetgrass: 335 * Terry: 635, 637, 957 * Thompson Falls: 242, 615, 827 * Three Forks: 285, 616 * Townsend: 266, 521, 949, 980 * Troy: 295 * Turner: 379 * Twin Bridges: 684 * Valier: 279 * Victor: 642 * Virginia City: 843 * Valley Industrial Park: 524 * Warm Springs: 693 *

West Beach West Beach may refer to: ;Australia * West Beach, South Australia *West Beach, Western Australia ;United States *West Beach (Santa Barbara), California *West Beach, Beverly, Massachusetts ;South Africa *West Beach, Western Cape West or Occide ...

: 877 * Westby: 385 * West Camp Crook: 972 * West Glacier: 888 * West Glendive: 687, 939, 941, 989 * West Sidney: 798 * West Squaw Gap: 569 *

West Yellowstone West Yellowstone is a town in Gallatin County, Montana, United States, adjacent to Yellowstone National Park. The population was 1,272 at the 2020 census. West Yellowstone is served by Yellowstone Airport. It is part of the Bozeman, MT Microp ...

: 640, 641, 646 * Whitefish: 730, 862, 863 * Whitehall: 287 * Whitewater: 674 * White Sulphur Springs: 305, 547 * Wibaux: 795, 796 * Wilsall: 578 *

Winifred Winifred is a feminine given name, an anglicization of Welsh ''Gwenffrewi'', from ''gwen'', "fair", and ''ffrew'', "stillness". It may refer to: People * Saint Winifred * Winifred Atwell (1914–1983), a pianist who enjoyed great popularity in Bri ...

: 462 *

Winnett Winnett is a town in and the county seat of Petroleum County, Montana, United States. The population was 188 at the 2020 census. History Winnett was named for Walter John Winnett, who was born at the Queen's Hotel in Toronto, Ontario, Cana ...

: 429 * Wisdom: 689 *

Wise River The Wise River is a tributary of the Big Hole River, approximately 30 mi (48 km) long, in southwestern Montana in the United States. It rises in the Beaverhead National Forest in the Pioneer Mountains in Beaverhead County. It flows NNW ...

: 832 *

Wolf Creek Wolf Creek may refer to: Bodies of water Missouri * Wolf Creek (Beaver Creek tributary) * Wolf Creek (Cane Creek tributary) * Wolf Creek (Cave Creek tributary) * Wolf Creek (Elkhorn Creek tributary) * Wolf Creek (South Grand River tributary) * W ...

: 235, 302 * Wolf Point: 650, 653 * Worden: 967 * Wyola: 343 * Yellow Bay: 692, 982 * Premium numbers: (1-406) 976

Use by Google

On December 10, 2008, Google's Gmail Blog announced that

SMS Short Message/Messaging Service, commonly abbreviated as SMS, is a text messaging service component of most telephone, Internet and mobile device systems. It uses standardized communication protocols that let mobile devices exchange short text ...

messages could be sent from inside Gmail. The messages are sent from numbers in the 406 area code. Each number is unique and can be bookmarked for replies or future use. Google also employs the use of area code 406 for the assignment of reply-to or callback numbers for Google Voice's customers' contacts.

Exchanges in area code 406

Use by Google

References

See also