406 Area Code

Q: What time zone is 406 in?

The 406 area code follows the Mountain Time Zone (MST/MDT).

The 406 area code is a telephone area code in the state of Montana, USA. Established in 1947 as one of the original North American Numbering Plan (NANP) codes, it is unique because it is the only area code that covers the entire state of Montana. From the Rocky Mountains to the Great Plains, every city and town in Montana uses the 406 code, making it one of the most iconic area codes in the United States.

Understanding the 406 Area Code

The 406 area code serves all of Montana, including major cities and small rural communities. Because of the state�s lower population compared to other regions, no overlays have been added, and Montana continues to use a single statewide area code.

406 Area Code Map and Location

The 406 area code map covers the entire state of Montana, from Billings and Missoula to Bozeman, Great Falls, and Helena.

Major Cities and Communities in the 406 Area Code

Billings - Largest city in Montana
Missoula - Home to the University of Montana
Bozeman - Known for Montana State University and proximity to Yellowstone
Great Falls - An important regional hub
Helena - The capital city of Montana

ZIP Codes within the 406 Telephone Zone (Examples)

59101 - Billings, MT
59801 - Missoula, MT
59715 - Bozeman, MT
59401 - Great Falls, MT
59601 - Helena, MT

Time Zone

The 406 area code is located in the Mountain Time Zone (MT). Some areas near the eastern border may observe Central Time, but the majority of Montana follows Mountain Standard Time (MST, UTC-7) and Mountain Daylight Time (MDT, UTC-6) during daylight saving time.

Dialing, Phone & Service Details

Overlay: None (406 is the only Montana area code)
Local dialing: 10-digit dialing required
Long-distance calls within the USA: Dial 1 + 406 + 7-digit number
International calls: Dial your country�s exit code + 1 + 406 + 7-digit number
Services: Landline, mobile, and VoIP numbers

What area code is 406? / Where�s area code 406?

What area code is 406? � The 406 area code is the statewide telephone code for Montana, covering all cities and towns.

Where�s area code 406? � The 406 area code is located in the state of Montana, USA, serving Billings, Missoula, Bozeman, Helena, and Great Falls.

Frequently Asked Questions (FAQ) about 406 Area Code

What is the 406 area code?

The 406 area code serves the entire state of Montana.

When was the 406 area code created?

The 406 area code was established in 1947 as one of the original NANP codes.

Where is area code 406 located?

It covers all of Montana, including Billings, Missoula, Bozeman, Great Falls, and Helena.

What time zone is 406 in?

The 406 area code follows the Mountain Time Zone (MST/MDT), with some areas close to the border observing Central Time.

Does 406 have an overlay?

No, 406 is the only area code for the state of Montana.

Is 406 a famous area code?

Yes, 406 is well known because it uniquely represents the entire state of Montana.

Feature	Details
Area Code	406
State	Montana
Primary Cities	Billings, Missoula, Bozeman, Helena, Great Falls
Region Covered	Entire state of Montana
Established	1947
Overlay	None
Time Zone	Mountain Time (MST/MDT)
ZIP Examples	59101, 59801, 59715, 59401, 59601
Services	Landline, mobile, VoIP
Dialing	+1 406 NXX XXXX
Country	United States of America

Ares Code	Office / Place	Address
406 Area Code	University of Montana	32 Campus Dr, Missoula, MT 59812
406 Area Code	Montana State University	Montana Hall, Bozeman, MT 59717
406 Area Code	Montana Tech	1300 W Park St, Butte, MT 59701
406 Area Code	Montana State University Billings	1500 University Dr, Billings, MT 59101
406 Area Code	Montana State University Northern	300 13th St W, Havre, MT 59501
406 Area Code	University of Providence	1301 20th St S, Great Falls, MT 59405
406 Area Code	Carroll College	1601 N Benton Ave, Helena, MT 59625
406 Area Code	University of Montana Western	710 S Atlantic St, Dillon, MT 59725
406 Area Code	Rocky Mountain College	1511 Poly Dr, Billings, MT 59102
406 Area Code	Salish Kootenai College	58138 US-93, Pablo, MT 59855
406 Area Code	Billings Clinic Hospital	2800 10th Ave N, Billings, MT 59101
406 Area Code	Providence St. Patrick Hospital	500 W Broadway St, Missoula, MT 59802
406 Area Code	Benefis Health System	1101 26th St S, Great Falls, MT 59405
406 Area Code	Bozeman Health Deaconess Hospital	915 Highland Blvd, Bozeman, MT 59715
406 Area Code	Logan Health Medical Center	310 Sunnyview Ln, Kalispell, MT 59901
406 Area Code	St. Peter�s Health Regional Medical Center	2475 Broadway St, Helena, MT 59601
406 Area Code	St. James Healthcare	400 S Clark St, Butte, MT 59701
406 Area Code	Holy Rosary Healthcare	2600 Wilson St, Miles City, MT 59301
406 Area Code	Northern Montana Hospital	30 13th St, Havre, MT 59501
406 Area Code	First Interstate Bank	401 N 31st St, Billings, MT 59101
406 Area Code	First Security Bank	1704 Dearborn Ave, Missoula, MT 59801
406 Area Code	Glacier Bank	2240 N Montana Ave, Helena, MT 59601
406 Area Code	Opportunity Bank of Montana	2020 Charlotte St, Bozeman, MT 59718
406 Area Code	Wells Fargo Bank	401 Central Ave, Great Falls, MT 59401
406 Area Code	Bank of Montana	125 Bank St, Kalispell, MT 59901
406 Area Code	US Bank	20 N Main St, Butte, MT 59701
406 Area Code	Stockman Bank	700 Main St, Miles City, MT 59301
406 Area Code	Montana State Capitol	1301 E 6th Ave, Helena, MT 59601
406 Area Code	Governor�s Office	Montana State Capitol, Helena, MT 59601
406 Area Code	Montana Supreme Court	215 N Sanders St, Helena, MT 59601
406 Area Code	Billings City Hall	210 N 27th St, Billings, MT 59101
406 Area Code	Missoula County Courthouse	200 W Broadway St, Missoula, MT 59802
406 Area Code	Cascade County Courthouse	415 2nd Ave N, Great Falls, MT 59401
406 Area Code	Gallatin County Courthouse	311 W Main St, Bozeman, MT 59715
406 Area Code	Billings Logan International Airport	1901 Terminal Cir, Billings, MT 59105
406 Area Code	Missoula International Airport	5225 US-10 W, Missoula, MT 59808
406 Area Code	Bozeman Yellowstone International Airport	850 Gallatin Field Rd, Belgrade, MT 59714
406 Area Code	Glacier Park International Airport	4170 US-2, Kalispell, MT 59901
406 Area Code	Great Falls International Airport	2800 Terminal Dr, Great Falls, MT 59404
406 Area Code	Helena Regional Airport	2850 Skyway Dr, Helena, MT 59602
406 Area Code	Bert Mooney Airport	101 Airport Rd, Butte, MT 59701
406 Area Code	Moss Mansion Museum	914 Division St, Billings, MT 59101
406 Area Code	Yellowstone Art Museum	401 N 27th St, Billings, MT 59101
406 Area Code	Historical Museum at Fort Missoula	3400 Captain Rawn Way, Missoula, MT 59804
406 Area Code	Montana Natural History Center	120 Hickory St, Missoula, MT 59801
406 Area Code	Museum of the Rockies	600 W Kagy Blvd, Bozeman, MT 59717
406 Area Code	C.M. Russell Museum	400 13th St N, Great Falls, MT 59401
406 Area Code	Lewis and Clark Interpretive Center	4201 Giant Springs Rd, Great Falls, MT 59405
406 Area Code	Montana Historical Society Museum	225 N Roberts St, Helena, MT 59601
406 Area Code	Hockaday Museum of Art	302 2nd Ave E, Kalispell, MT 59901
406 Area Code	World Museum of Mining	155 Museum Way, Butte, MT 59701
406 Area Code	Glacier National Park Headquarters	West Glacier, MT 59936
406 Area Code	Yellowstone National Park (MT section)	Gardiner, MT 59030
406 Area Code	Pictograph Cave State Park	3401 Coburn Rd, Billings, MT 59101
406 Area Code	Gallatin National Forest	Bozeman, MT 59715
406 Area Code	Rattlesnake National Recreation Area	Missoula, MT 59802
406 Area Code	Giant Springs State Park	4803 Giant Springs Rd, Great Falls, MT 59405
406 Area Code	Mount Helena City Park	225 Mount Helena Dr, Helena, MT 59601
406 Area Code	Lone Pine State Park	300 Lone Pine Rd, Kalispell, MT 59901
406 Area Code	Billings Public Library	510 N Broadway, Billings, MT 59101
406 Area Code	Missoula Public Library	455 E Main St, Missoula, MT 59802
406 Area Code	Bozeman Public Library	626 E Main St, Bozeman, MT 59715
406 Area Code	Lewis & Clark Library	120 S Last Chance Gulch, Helena, MT 59601
406 Area Code	Great Falls Public Library	301 2nd Ave N, Great Falls, MT 59401
406 Area Code	ImagineIF Library	247 1st Ave E, Kalispell, MT 59901
406 Area Code	Butte-Silver Bow Public Library	226 W Broadway St, Butte, MT 59701

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