Where is Area Code 406?
Area code 406 is exclusively assigned to the state of Montana. It is the only area code that serves the entire state, covering a vast and diverse region. Here are some of the major cities, counties, and regions that fall under the 406 area code:
- Billings
- Missoula
- Great Falls
- Bozeman
- Butte
- Helena
- Kalispell
- Flathead County
- Yellowstone County
- Missoula County
- Gallatin County
- Lewis and Clark County
For more information about the regions covered by area code 406, visit the Montana Public Service Commission (PSC).
Montana Public Service Commission (PSC)
1701 Prospect Ave, PO Box 202601, Helena, Montana 59620-2601
Phone: (406) 444-6199
TTY: 711
Email: pschelp@mt.gov
What time zone is 406 area code in the USA?
The 406 area code is located in the Mountain Time Zone (MT). This time zone is seven hours behind Coordinated Universal Time (UTC-7). During daylight saving time, which is observed from the second Sunday in March to the first Sunday in November, the time zone shifts to Mountain Daylight Time (MDT), which is UTC-6. For accurate timekeeping, refer to the National Institute of Standards and Technology.
History of the 406 Area Code
The 406 area code was created in 1947 as part of the original North American Numbering Plan (NANP). It has remained unchanged since its inception, making it one of the few area codes in the United States that has never been split or overlaid. The stability of the 406 area code is largely due to Montana's relatively low population density and growth rate. For more historical details, visit the North American Numbering Plan Administrator (NANPA).
NANPA Mailing Address
One Tower Center Boulevard
Suite 800
East Brunswick, NJ 08816
NANPA Customer Support
Tel: 1-866-623-2282
Email: support@nanpa.com
Fax: 571-363-3838
How Many People Use the 406 Area Code?
The 406 area code serves the entire state of Montana, which has a population of 1,400,000 according to the latest data from the U.S. Census Bureau. This population is spread across a large geographic area, contributing to the continued use of a single area code for the state.
U.S. Census Bureau
4600 Silver Hill Road, Washington, DC 20233
Tel: 301-763-INFO (4636) or 800-923-8282
Is the 406 Area Code Toll-Free?
The 406 area code is a geographic area code, not a toll-free number. It is specifically assigned to the state of Montana and is used for landline and mobile phone numbers within the state. Toll-free numbers in the United States typically begin with the prefixes 800, 888, 877, 866, 855, 844, or 833. For more information on toll-free numbers, visit the Federal Communications Commission.
Federal Communications Commission
45 L Street NE, Washington, DC 20554
Tel: 1-888-CALL FCC (225-5322)
https://www.fcc.gov/