406 Area Code
Montana, USA
Local time now · Mountain Time
1:44 AM
Area code 406 is in Montana, USA, serving Billings, Missoula, Great Falls and Bozeman. It uses Mountain Time — the time there now is 1:44 AM. In service since 1947.
| Area code | 406 |
|---|---|
| Location | Montana, USA |
| Major cities | Billings, Missoula, Great Falls, Bozeman, Butte, Helena, Kalispell, Belgrade |
| Time zone | Mountain Time |
| In service since | 1947 |
| Dialing | 1+10 digit permissible at service provider discretion. |
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Frequently asked questions
Where is area code 406?
Montana, USA — including Billings, Missoula, Great Falls, Bozeman and Butte.
What time zone is area code 406?
Mountain Time.
How do I call a 406 number from abroad?
Dial your international access code, then 1 (the country code), then 406 and the 7-digit number — for example +1 406 555 0100. From the UK or India dial 00 1 406 …; from Bangladesh 00 1 406 … .
Is a call from 406 a scam?
Not by itself — 406 is an ordinary geographic area code in Montana. Numbers can be spoofed, so be careful with unexpected calls asking for money or personal details.
Sources: North American Numbering Plan Administrator (NANPA) NPA database (10/25/2026); major cities from Wikidata (CC0). An area code shows where a number was first assigned — with number portability and mobile phones, the caller may be anywhere.