🇺🇸USA State Guide: Montana

Montana (MT)
Calling Code 406

Connecting to "Big Sky Country"? Montana is a unique single-area-code state. Whether you are calling Billings, Missoula, or Bozeman, you just need one code: 406.

How to Dial
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How to Call Montana

Calling Montana is simple because the entire state shares a single area code.

1

Exit Code

Dial 00 (Europe) or 011 (World).
(Or just use + on mobile/VoIP)

2

US Code (+1)

Dial +1. This is the country code for the United States.

3

Code 406

Dial 406 followed by the 7-digit number. This covers all of Montana.

The "406" Identity

Montana is one of the few remaining states with a single area code. "406" is more than just a number; it's a symbol of state pride. You never have to guess the area code, it's always 406.

Major Montana Cities (406)

All these cities use the 406 area code.

CityCountyArea Code
BillingsYellowstone406
MissoulaMissoula406
Great FallsCascade406
BozemanGallatin406
ButteSilver Bow406
HelenaLewis and Clark406
KalispellFlathead406

Why Use VoIP to
Call Montana?

Calling rural US states like Montana from abroad can be costly with traditional carriers. StartACall uses advanced VoIP technology to connect you to the 406 area code instantly and cheaply.

  • Connect to Billings & Missoula instantly
  • Avoid high international roaming fees
  • Crystal clear voice quality even to rural areas
  • No app download required

Save Money

Competitive rates to US numbers.

Anywhere

Call from your laptop in London to a mobile in Bozeman.

Secure

Bank-level encryption keeps your conversations private.

Instant

No setup time. Just enter the 406 number and talk.

Frequently Asked Questions

Does Montana really only have one area code?

Yes! Montana is one of the few states (along with states like Wyoming and Alaska) that still uses a single area code (406) for the entire state.

What time is it in Montana?

Montana is in the Mountain Time Zone (MT). It is usually 7 hours behind GMT/UTC (or 6 hours behind during Daylight Saving Time).

Can I call Montana mobiles and landlines?

Yes, StartACall allows you to call both mobile phones and landlines in Montana. The rate is typically the same for both in the US.

Do I need to dial +1 before 406?

If you are calling from outside the USA (or using our browser dialer), yes. You should dial +1 406 followed by the number.

Ready to call Montana?

Connect with the 406 instantly. No credit card required to sign up.

One Code for a Whole State: How 406 Works for International Callers

In short

Montana has kept a single area code since 1947, which makes dialing simple but hides a few details worth knowing. This covers what the statewide 406 means in practice, the ten-digit dialing change, Mountain Time calling windows from Europe and Asia, and how mobiles fit into the picture.

Every Montana City Shares 406

Billings, Missoula, Bozeman, Great Falls, Helena, Butte, and Kalispell all sit inside 406, one of the original area codes drawn in 1947 and never split. The code covers roughly 147,000 square miles, so two 406 numbers can belong to towns a seven hour drive apart.

Locals treat the number as an identity. You will see 406 on merchandise, business names, and license plate frames, which is rare for an area code. For a caller abroad the benefit is purely practical, since there is never a question of which code a Montana contact uses.

Montana's population of just over a million explains the code's longevity. Area codes exhaust when demand for numbers outruns supply, and Montana's demand has stayed comfortably within one code's capacity even after every resident added a mobile. Neighboring Wyoming and both Dakotas preserve single statewide codes for the same reason.

The Ten-Digit Dialing Change

For decades Montanans could dial seven digits locally. That ended with the national rollout of the 988 crisis line, after which calls within 406 require the full ten digits. The change affected local habits but nothing about how the rest of the world dials in.

From abroad the format was always full length anyway: your exit code, then 1, then 406 and the seven-digit number. Saving contacts as +1 406 followed by the number keeps them dialable from any country and any handset without edits.

Mountain Time and When to Ring

Montana observes Mountain Time, seven hours behind the UK for most of the year and eight behind Central Europe. A 5 pm call from London lands in Bozeman at 10 am. Callers from Spain or Germany should think of their evening as Montana's late morning.

From Asia and Australia the offset is large. Sydney runs sixteen to seventeen hours ahead, so a 9 am call from Sydney reaches Montana around 4 pm the previous day. Tokyo's 10 pm is Montana's early morning. Aim for your own late evening from East Asia to catch Montana mornings.

Montana does observe daylight saving, so the seven hour UK gap holds most of the year but wobbles during the weeks when only one side has changed clocks. For a standing call with someone in Bozeman or Missoula, anchor the schedule to Mountain Time and let your own local hour float.

Mobiles, Ranches, and Rates

A 406 number tells you nothing about the device on the other end. Cell phones, ranch landlines, and business VoIP lines all draw from the same code, and every one of them costs the same to call internationally because US rates do not split by number type.

For occasional calls to Montana, per-minute browser calling is a good fit. StartACall runs in Chrome, Safari, Firefox, or Edge over WebRTC, needs no app or SIM, charges no connection fee, and unused credits never expire between calls. A free first call lets you test the route.

Frequently asked questions

Will Montana ever get a second area code?+

Only if 406 approaches number exhaustion, at which point regulators would add an overlay rather than split the state. No overlay is in service today, so every Montana number begins with 406.

How do I call Billings from Australia?+

Dial 0011, Australia's exit code, then 1 406 and the seven-digit Billings number. Remember Montana runs sixteen to seventeen hours behind eastern Australia, so mornings in Australia reach Montana the prior afternoon.

Why did Montana switch to ten-digit local dialing?+

The national 988 mental health line required every region with conflicting seven-digit numbers to adopt full ten-digit dialing. Montana was affected, so even neighbors in the same town now dial all ten digits.

Does one code mean cheaper calls to Montana?+

The code count has no effect on price. Rates to Montana match rates to any other US state, with mobiles and landlines billed identically on per-minute international services. Distance and code count play no part in pricing.

Is any part of Montana on a different time zone?+

No. The entire state observes Mountain Time, including daylight saving in summer. Whatever 406 number you dial, from Kalispell to Billings, the local clock is the same. Set one offset and it applies to every 406 number.

Last reviewed June 2026Reviewed by the StartACall calling teamDialing rules cross checked against ITU international dialing procedures
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