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Area code 406

From Wikipedia, the free encyclopedia
Telephone area code for Montana, United States
Montana numbering plan area and area code (blue)

Area code 406 is the telephonearea code in theNorth American Numbering Plan for the entireU.S. state ofMontana. It has been Montana's only area code since theAmerican Telephone and Telegraph Company created a nationwidetelephone numbering plan in 1947.

As of 2013, 47 carriers served 1.7 million lines in Montana. All but two wireline providers supportlocal 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 2031;number pooling has been implemented in response to increased demand and inefficient use of 406 numbering resources.[1][2]

Prior to October 2021, area code 406 had telephone numbers assigned for thecentral office code 988. In 2020,988 was designated nationwide as a dialing code for theNational Suicide Prevention Lifeline, which created a conflict for exchanges that permitseven-digit dialing. This area code was therefore scheduled to transition toten-digit dialing by October 24, 2021.[3]

For many Montanans, area code 406 has become an unofficialsymbol of the state.[4] Some Montanans celebrate April 6 as "406 Day," an unofficial holiday celebrating the state.[5]

Central office codes of communities

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Within the Montana numbering plan area, the following communities are served by the listedcentral office codes:

See also

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References

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  1. ^Inbody, Kristen (27 Nov 2017)."In Montana, it's 406 exclusively until 2031".Great Falls Tribune. www.greatfallstribune.com. Retrieved13 June 2023.
  2. ^"Montana PSC Granted Authority to Implement Mandatory Number Pooling".fcc.gov. 12 December 2015.Archived from the original on 10 December 2017. Retrieved7 May 2018.
  3. ^"Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline)"(PDF). North American Numbering Plan Administrator. January 8, 2021. RetrievedMarch 9, 2021.
  4. ^Stetz, Mike (5 October 2019)."406, more than just an area code".NonStop Local. ABC FOX. Retrieved17 March 2025.
  5. ^Juneau, Brianna (7 April 2023)."Celebrating Montana on '406 Day'".3KRTV. Scripps Media Inc. Retrieved17 March 2025.
  6. ^North Parkman is served from wire centreDNRHWYMARS1Archived 2014-10-19 at theWayback Machine in Sheridan, WY
  7. ^Silvertip is served fromPOWLWYMARS1Archived 2014-10-19 at theWayback Machine Powell, WY
  8. ^West Beach is served fromBECHNDXADS1Archived 2014-10-19 at theWayback Machine in Beach, ND
  9. ^West Camp Crook is served fromCMCRSDXARL0Archived 2014-10-19 at theWayback Machine in Camp Crook, SD
  10. ^West Squaw Gap is served fromSQGPNDXARS5Archived 2014-10-19 at theWayback Machine Squaw Gap, ND

External links

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Montana area codes:406
North:236/672/778,250,306,403,587/825/368,639
West:208/986406East:605,701
South:307
Alberta area codes:403,587/825/368,780
British Columbia area codes:250,604,236/257/672/778
Saskatchewan area codes:306/639/474
Idaho area codes:208/986
North Dakota area codes:701
South Dakota area codes:605
Wyoming area codes:307
United States
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