Area Code 406 Information



Area Code 406
Population 131508
Type of Code: General Purpose Code
Geographic(G) or non-geographic(N): G
Is this code assigned: Yes
Is this code in use: Y
In service date: 1947-01-01
Planning Letter(s): 556 544
Location: MT
Country: US
Time Zone: M
Parent NPA:

Area code 406 is in Montana, a state located in the northwestern region of the United States. Montana, also known as the Treasure State, represents the rugged beauty of the Wild West, with its picturesque landscape and majestic mountain ranges. With a population of just over 1 million people, Montana has one of the lowest populations in the country, which explains why the entire state shares a single area code.

Zip Codes and Cities within Area Code 406

Area code 406 covers all cities and towns in Montana, including the capital, Helena, the largest city, Billings, and other well-known cities such as Missoula, Great Falls, Bozeman, and Butte. Given that it covers the entire state, area code 406 is extensive and diverse regarding its geography and the communities it represents.

Some of the most populated zip codes within the 406 area code include 59102 in Billings, with a population of 47,418; 59801 in Missoula, with a population of 30,999; and 59715 in Bozeman, which is home to 27,509 residents. On the other end of the spectrum, area code 406 also covers smaller towns and rural communities, like the zip code 59225 in Flaxville, with just 36 residents.

History of Area Code 406

Montana's area code 406 was established as the state's first and only area code in 1947 as part of the original North American Numbering Plan (NANP). The NANP intended to simplify phone dialing and improve the efficiency of telephone call routing. At that time, the need for a single area code for Montana made sense, given the state's relatively small population and the fact that it was largely rural.

Although Montana has developed significantly since 1947, the demand for new phone numbers has not been significant enough to warrant a change in the original area code. Thanks to the state's sparse population, expansive geography, and close-knit communities, 406 has remained the sole area code for the Treasure State.

Population and Demographics

United States Census Bureau estimates Montana's population in 2019 was approximately 1,068,778. The majority of residents identify as White (89.2%), while smaller people identify as Native American (6.7%), Hispanic or Latino (4.0%), and African American (0.6%). The state's gender distribution is relatively equal, with 50.3% male and 49.7% female.

The relatively sparse population of Montana contributes to its lower demand for new phone numbers and the continuation of a single area code. Montana's population growth rate is relatively slow, with only a 3.6% increase since 2010.

Montana's area code 406 is a testament to the state's unique geographical and demographic features and its rich history and connection to the early days of telephone communication in the United States. With only a single area code to cover the entire state, residents have a unique sense of unity and identity that sets the Treasure State apart from its neighbors. Although Montana may eventually find itself facing the prospect of an additional area code due to population growth and technological advancements, 406 will forever remain ingrained in the culture and identity of Montana.

Area Code Zipcodes



Zipcode City State
59001 ABSAROKEE Montana
59002 ACTON Montana
59002 MOLT Montana
59003 ASHLAND Montana
59004 ASHLAND Montana
59004 SAINT LABRE MISSION Montana
59006 BALLANTINE Montana
59007 BEARCREEK Montana
59007 WASHOE Montana
59008 BELFRY Montana
59010 BIGHORN Montana
59011 BIG TIMBER Montana
59012 BIRNEY Montana
59013 BOYD Montana
59014 BRIDGER Montana
59015 BROADVIEW Montana
59015 COMMANCHE Montana
59016 BUSBY Montana
59016 KIRBY Montana
59018 CLYDE PARK Montana
59019 COLUMBUS Montana
59020 COOKE CITY Montana
59022 CROW AGENCY Montana
59024 CUSTER Montana
59025 DECKER Montana
59026 EDGAR Montana
59027 EMIGRANT Montana
59027 MINER Montana
59028 FISHTAIL Montana
59029 FROMBERG Montana
59030 CORWIN SPRINGS Montana
59030 GARDINER Montana
59030 JARDINE Montana
59031 GARRYOWEN Montana
59032 GRASS RANGE Montana
59033 GREYCLIFF Montana
59034 HARDIN Montana
59035 FORT SMITH Montana
59035 YELLOWTAIL Montana
59036 HARLOWTON Montana
59037 HUNTLEY Montana
59038 HYSHAM Montana
59038 SANDERS Montana
59039 INGOMAR Montana
59041 JOLIET Montana
59041 SILESIA Montana
59043 LAME DEER Montana
59044 LAUREL Montana
59046 BELMONT Montana
59046 CUSHMAN Montana
59046 LAVINA Montana
59047 LIVINGSTON Montana
59050 LODGE GRASS Montana
59052 MC LEOD Montana
59052 MCLEOD Montana
59053 LENNEP Montana
59053 MARTINSDALE Montana
59054 MELSTONE Montana
59055 MELVILLE Montana
59057 MOLT Montana
59058 MOSBY Montana
59059 MUSSELSHELL Montana
59061 BEEHIVE Montana
59061 NYE Montana
59062 OTTER Montana
59063 PARK CITY Montana
59064 POMPEY PILLAR Montana
59064 POMPEYS PILLAR Montana
59065 PRAY Montana
59065 WAN I GAN Montana
59066 PRYOR Montana
59067 RAPELJE Montana
59068 LUTHER Montana
59068 RED LODGE Montana
59069 REED POINT Montana
59070 FOX Montana
59070 ROBERTS Montana
59071 ALPINE Montana
59071 ROSCOE Montana
59072 KLEIN Montana
59072 ROUNDUP Montana
59073 DELPHIA Montana
59073 ROUNDUP Montana
59074 RYEGATE Montana
59075 SAINT XAVIER Montana
59076 HYSHAM Montana
59076 SANDERS Montana
59077 SAND SPRINGS Montana
59078 SHAWMUT Montana
59079 SHEPHERD Montana
59081 COOKE CITY Montana
59081 SILVER GATE Montana
59082 SPRINGDALE Montana
59083 SUMATRA Montana
59084 TEIGEN Montana
59084 WINNETT Montana
59085 TWO DOT Montana
59086 WILSALL Montana
59087 CAT CREEK Montana
59087 WINNETT Montana
59088 WORDEN Montana
59089 WYOLA Montana
59101 BILLINGS Montana
59101 LOCKWOOD Montana
59102 BILLINGS Montana
59102 HESPER Montana
59103 BILLINGS Montana
59104 BILLINGS Montana
59105 BILLINGS Montana
59106 BILLINGS Montana
59107 BILLINGS Montana
59108 BILLINGS Montana
59111 BILLINGS Montana
59111 PUBLIC WORKS Montana
59112 BILLINGS Montana
59112 MT DAKOTA UTIL CO Montana
59114 BILLINGS Montana
59114 K O A Montana
59115 BILLINGS Montana
59115 US BANK Montana
59116 BILLINGS Montana
59116 FIRST INTERSTATE BANK Montana
59117 BILLINGS Montana
59117 WELLS FARGO BANK Montana
59201 OSWEGO Montana
59201 WOLF POINT Montana
59211 ANTELOPE Montana
59212 BAINVILLE Montana
59213 BROCKTON Montana
59214 BROCKWAY Montana
59215 CIRCLE Montana
59217 CRANE Montana
59218 CULBERTSON Montana
59218 MCCABE Montana
59219 DAGMAR Montana
59221 FAIRVIEW Montana
59222 FLAXVILLE Montana
59223 FORT PECK Montana
59225 FRAZER Montana
59225 LUSTRE Montana
59226 FROID Montana
59230 GLASGOW Montana
59230 SAINT MARIE Montana
59230 TAMPICO Montana
59231 GLASGOW Montana
59231 SAINT MARIE Montana
59231 ST MARIE Montana
59240 GLENTANA Montana
59241 HINSDALE Montana
59242 HOMESTEAD Montana
59243 ENID Montana
59243 LAMBERT Montana
59244 LARSLAN Montana
59247 MEDICINE LAKE Montana
59248 NASHUA Montana
59250 OPHEIM Montana
59252 OUTLOOK Montana
59253 PEERLESS Montana
59254 PLENTYWOOD Montana
59255 POPLAR Montana
59256 RAYMOND Montana
59257 REDSTONE Montana
59258 RESERVE Montana
59259 RICHEY Montana
59260 RICHLAND Montana
59261 SACO Montana
59262 SAVAGE Montana
59263 FOUR BUTTES Montana
59263 SCOBEY Montana
59270 SIDNEY Montana
59273 VANDALIA Montana
59274 VIDA Montana
59275 WESTBY Montana
59276 WHITETAIL Montana
59301 MILES CITY Montana
59311 ALZADA Montana
59312 ANGELA Montana
59313 BAKER Montana
59314 BIDDLE Montana
59315 BLOOMFIELD Montana
59316 BOYES Montana
59317 BROADUS Montana
59318 BRUSETT Montana
59319 CAPITOL Montana
59322 COHAGEN Montana
59323 COLSTRIP Montana
59324 EKALAKA Montana
59324 MILL IRON Montana
59326 FALLON Montana
59327 FORSYTH Montana
59330 GLENDIVE Montana
59332 HAMMOND Montana
59333 HATHAWAY Montana
59336 ISMAY Montana
59337 JORDAN Montana
59338 KINSEY Montana
59339 LINDSAY Montana
59341 FALLON Montana
59341 MILDRED Montana
59343 OLIVE Montana
59344 PLEVNA Montana
59345 POWDERVILLE Montana
59347 ROSEBUD Montana
59349 TERRY Montana
59351 VOLBORG Montana
59353 WIBAUX Montana
59354 WILLARD Montana
59401 GREAT FALLS Montana
59402 GREAT FALLS Montana
59402 MALMSTROM AFB Montana
59403 GREAT FALLS Montana
59404 GREAT FALLS Montana
59405 GREAT FALLS Montana
59406 GREAT FALLS Montana
59410 AUGUSTA Montana
59411 BABB Montana
59412 ARMINGTON Montana
59412 BELT Montana
59412 WAYNE Montana
59414 BLACK EAGLE Montana
59416 BRADY Montana
59417 BLACKFOOT Montana
59417 BROWNING Montana
59417 SAINT MARY Montana
59417 ST MARY Montana
59418 BUFFALO Montana
59418 STRAW Montana
59419 BYNUM Montana
59420 CARTER Montana
59421 CASCADE Montana
59422 CHOTEAU Montana
59424 COFFEE CREEK Montana
59425 CONRAD Montana
59427 CUT BANK Montana
59427 SANTA RITA Montana
59430 DENTON Montana
59432 DUPUYER Montana
59433 DUTTON Montana
59434 E GLACIER PAR Montana
59434 E GLACIER PARK Montana
59434 E GLACIER PK Montana
59434 EAST GLACIER Montana
59434 EAST GLACIER PARK Montana
59434 RISING SUN Montana
59435 ETHRIDGE Montana
59436 FAIRFIELD Montana
59436 GOLDEN RIDGE Montana
59440 FLOWEREE Montana
59441 FOREST GROVE Montana
59442 FORT BENTON Montana
59443 FORT SHAW Montana
59444 GALATA Montana
59446 GERALDINE Montana
59446 SQUARE BUTTE Montana
59447 GEYSER Montana
59448 HEART BUTTE Montana
59450 HIGHWOOD Montana
59450 SHONKIN Montana
59451 HILGER Montana
59452 HOBSON Montana
59453 GARNEILL Montana
59453 JUDITH GAP Montana
59454 KEVIN Montana
59456 LEDGER Montana
59457 HEATH Montana
59457 LEWISTOWN Montana
59460 LOMA Montana
59461 LOTHAIR Montana
59462 BENCHLAND Montana
59462 MOCCASIN Montana
59463 MONARCH Montana
59464 MOORE Montana
59465 NEIHART Montana
59466 FERDIG Montana
59466 OILMONT Montana
59467 PENDROY Montana
59468 POWER Montana
59469 RAYNESFORD Montana
59471 ROY Montana
59472 SAND COULEE Montana
59472 TRACY Montana
59474 SHELBY Montana
59477 SIMMS Montana
59479 STANFORD Montana
59479 WINDHAM Montana
59480 STOCKETT Montana
59482 SUNBURST Montana
59483 SUN RIVER Montana
59484 SWEET GRASS Montana
59485 ULM Montana
59486 VALIER Montana
59487 VAUGHN Montana
59489 WINIFRED Montana
59501 HAVRE Montana
59520 BIG SANDY Montana
59521 BOX ELDER Montana
59521 ROCKY BOY Montana
59522 CHESTER Montana
59523 CHINOOK Montana
59524 DODSON Montana
59525 GILDFORD Montana
59526 HARLEM Montana
59527 HAYS Montana
59528 HINGHAM Montana
59529 HOGELAND Montana
59530 INVERNESS Montana
59531 JOPLIN Montana
59532 KREMLIN Montana
59535 LLOYD Montana
59537 LORING Montana
59538 MALTA Montana
59538 WAGNER Montana
59540 RUDYARD Montana
59542 TURNER Montana
59544 WHITEWATER Montana
59545 WHITLASH Montana
59546 ZORTMAN Montana
59547 ZURICH Montana
59601 HELENA Montana
59602 HELENA Montana
59604 HELENA Montana
59620 HELENA Montana
59620 STATE OF MONTANA Montana
59623 CITY COUNTY BUILDING Montana
59623 HELENA Montana
59624 HELENA Montana
59625 CARROLL COLLEGE Montana
59625 HELENA Montana
59626 HELENA Montana
59631 BASIN Montana
59632 BOULDER Montana
59633 CANYON CREEK Montana
59634 CLANCY Montana
59634 MONTANA CITY Montana
59635 EAST HELENA Montana
59636 FORT HARRISON Montana
59638 JEFFERSON CITY Montana
59638 JEFFERSON CTY Montana
59639 LINCOLN Montana
59640 MARYSVILLE Montana
59641 RADERSBURG Montana
59642 RINGLING Montana
59643 TOSTON Montana
59644 TOWNSEND Montana
59645 WHITE SULPHUR SPRINGS Montana
59645 WHT SPHR SPGS Montana
59647 WINSTON Montana
59648 CRAIG Montana
59648 WOLF CREEK Montana
59701 BUTTE Montana
59701 ROCKER Montana
59701 WALKERVILLE Montana
59702 BUTTE Montana
59703 BUTTE Montana
59707 BUTTE Montana
59707 NORTHWESTERN ENERGY Montana
59710 ALDER Montana
59711 ANACONDA Montana
59711 FAIRMONT Montana
59711 GEORGETOWN Montana
59711 OPPORTUNITY Montana
59713 AVON Montana
59714 BELGRADE Montana
59715 BOZEMAN Montana
59716 BIG SKY Montana
59717 BOZEMAN Montana
59717 MONTANA STATE UNIV BOZEMAN Montana
59718 BOZEMAN Montana
59719 BOZEMAN Montana
59720 CAMERON Montana
59721 CARDWELL Montana
59722 DEER LODGE Montana
59722 GALEN Montana
59724 DELL Montana
59725 DILLON Montana
59725 GRANT Montana
59727 DIVIDE Montana
59728 ELLISTON Montana
59729 ENNIS Montana
59730 GALLATIN GATEWAY Montana
59730 GALLATIN GTWY Montana
59731 GARRISON Montana
59732 GLEN Montana
59733 GOLD CREEK Montana
59735 HARRISON Montana
59736 JACKSON Montana
59739 LIMA Montana
59740 MC ALLISTER Montana
59740 MCALLISTER Montana
59741 AMSTERDAM Montana
59741 MANHATTAN Montana
59743 MELROSE Montana
59745 NORRIS Montana
59746 POLARIS Montana
59747 PONY Montana
59748 RAMSAY Montana
59749 SHERIDAN Montana
59750 BUTTE Montana
59750 SILVERBOW Montana
59751 SILVER STAR Montana
59752 THREE FORKS Montana
59752 TRIDENT Montana
59754 TWIN BRIDGES Montana
59755 VIRGINIA CITY Montana
59756 WARM SPRINGS Montana
59758 W YELLOWSTONE Montana
59758 WEST YELLOWSTONE Montana
59759 WHITEHALL Montana
59760 WILLOW CREEK Montana
59761 WISDOM Montana
59762 WISE RIVER Montana
59771 BOZEMAN Montana
59772 BOZEMAN Montana
59801 EAST MISSOULA Montana
59801 MISSOULA Montana
59801 MSLA Montana
59802 MISSOULA Montana
59802 MSLA Montana
59803 MISSOULA Montana
59803 MSLA Montana
59804 MISSOULA Montana
59804 MSLA Montana
59806 MISSOULA Montana
59806 MSLA Montana
59807 MISSOULA Montana
59807 MSLA Montana
59808 MISSOULA Montana
59808 MSLA Montana
59812 MISSOULA Montana
59812 MSLA Montana
59812 UNIV OF MT MISSOULA Montana
59820 ALBERTON Montana
59821 ARLEE Montana
59823 BONNER Montana
59823 GREENOUGH Montana
59823 POTOMAC Montana
59824 CHARLO Montana
59824 MOIESE Montana
59825 CLINTON Montana
59825 TURAH Montana
59826 CONDON Montana
59826 SWAN VALLEY Montana
59827 CONNER Montana
59828 CORVALLIS Montana
59829 DARBY Montana
59830 DE BORGIA Montana
59831 DIXON Montana
59832 DRUMMOND Montana
59833 FLORENCE Montana
59834 FRENCHTOWN Montana
59835 GRANTSDALE Montana
59837 HALL Montana
59840 HAMILTON Montana
59840 PINESDALE Montana
59841 PINESDALE Montana
59842 HAUGAN Montana
59843 HELMVILLE Montana
59844 HERON Montana
59845 HOT SPRINGS Montana
59845 NIARADA Montana
59846 HUSON Montana
59847 LOLO Montana
59848 HOT SPRINGS Montana
59848 LONEPINE Montana
59851 MILLTOWN Montana
59853 NOXON Montana
59854 OVANDO Montana
59855 PABLO Montana
59856 PARADISE Montana
59858 PHILIPSBURG Montana
59859 PLAINS Montana
59860 POLSON Montana
59863 RAVALLI Montana
59864 RONAN Montana
59865 SAINT IGNATIUS Montana
59865 ST IGNATIUS Montana
59866 SAINT REGIS Montana
59866 ST REGIS Montana
59867 SALTESE Montana
59868 GREENOUGH Montana
59868 SEELEY LAKE Montana
59870 STEVENSVILLE Montana
59871 SULA Montana
59872 SUPERIOR Montana
59873 COPPER KING Montana
59873 SNIDER Montana
59873 THOMPSON FALLS Montana
59873 THOMPSON FLS Montana
59874 TROUT CREEK Montana
59875 VICTOR Montana
59901 CRESTON Montana
59901 EVERGREEN Montana
59901 KALISPELL Montana
59903 KALISPELL Montana
59904 KALISPELL Montana
59910 BIG ARM Montana
59911 BIGFORK Montana
59911 SWAN LAKE Montana
59912 COLUMBIA FALLS Montana
59912 COLUMBIA FLS Montana
59913 CORAM Montana
59914 DAYTON Montana
59915 ELMO Montana
59916 ESSEX Montana
59917 EUREKA Montana
59918 FORTINE Montana
59919 HUNGRY HORSE Montana
59920 KILA Montana
59921 LAKE MC DONALD Montana
59921 LAKE MCDONALD Montana
59921 WEST GLACIER Montana
59922 LAKESIDE Montana
59923 LIBBY Montana
59925 MARION Montana
59926 MARTIN CITY Montana
59927 OLNEY Montana
59928 POLEBRIDGE Montana
59929 PROCTOR Montana
59930 REXFORD Montana
59931 ROLLINS Montana
59932 SOMERS Montana
59933 STRYKER Montana
59934 TREGO Montana
59935 TROY Montana
59935 YAAK Montana
59936 APGAR Montana
59936 WEST GLACIER Montana
59937 WHITEFISH Montana

FAQ


Where is area code 406?

The Area code 406 is located in Montana and includes the following cities:
  • Billings
  • Bozeman
  • Butte
  • Great Falls
  • Helena
  • Missoula