406 Area Code
Covers Billings and nearby communities in Montana.
(406) 555-0142Area code 406 map
Interactive coverage map for area code 406, centered on Billings, Montana
45.7833, -108.5007
Open in OpenStreetMapArea code 406 coverage map — centered on Billings. Shaded area shows the approximate reach around the primary city.
Calls tagged with area code 406 come from Billings and nearby communities in Montana. It reaches roughly 277,000 people across places such as Billings, Missoula, Great Falls, Bozeman and more. The region observes Mountain time, so a number like (406) 555-0142 is on that clock right now. On the ground it spans Yellowstone, Missoula, Cascade and nearby counties. It is not currently paired with an overlay code. Local calls inside the 406 area can generally be placed with ten digits, and you do not need a leading 1 for domestic calls. Keep reading for the current local time in Billings, a map of the 406 coverage area, the places it reaches, nearby and overlay codes, and how to tell a real 406 call from a scam.
Cities covered by 406
Cities & neighborhoods
- Billings
- Missoula
- Great Falls
- Bozeman
- Butte
- Helena
Counties
- Yellowstone
- Missoula
- Cascade
- Gallatin
- Silver Bow
- Lewis And Clark
Looking for the broader picture? See all Montana area codes.
Nearby & overlay area codes
Overlay codes (same area)
These share 406’s geography — a number in either code can be on the same street.
406 has no overlay code right now.
Neighboring codes
Codes for adjacent regions and metros.
No neighboring codes listed.
Is a call from 406 a scam?
Area code 406 serves Billings and the surrounding area, so most calls are ordinary local and business traffic. As everywhere, spam and robocalls do use 406 numbers, frequently by spoofing a local-looking caller ID to boost pickup rates. The area code itself tells you nothing about who is really calling, so judge the call by what's said, not the number.
Red flags to watch for
- Pressure to act right now, or threats of arrest, fines, or service being cut off.
- Requests to pay with gift cards, wire transfer, crypto, or a payment app.
- Asking for passwords, one-time codes, your SSN, or full card/bank numbers.
- A robocall or recording, or a number that won’t let you call back.
When unsure, hang up and call the organization back on a number you look up yourself.
Calling a 406 number from abroad
Every 406 number is a US/Canada +1 number. From a mobile anywhere, the simplest approach is to dial it in international format:
+1 406 555-0142If your phone can’t dial the +, replace it with your country’s exit code, then 1, then the number:
- UK, Germany, France & most of Europe
00 1 406 555-0142 - Australia
0011 1 406 555-0142 - Japan
010 1 406 555-0142 - Mexico
00 1 406 555-0142
Within the US and Canada you don’t need any of this — just dial the ten digits 406 555-0142.
Reverse phone lookup
Check any US or Canada number to see whether it's a working line, which carrier it sits on, whether it's mobile, landline or VoIP, and roughly where it's registered.
Shows carrier, line type and location. Owner name isn't available here.
Results are for personal, informational use only and may not be used for employment, credit, housing or tenant-screening decisions.
Area code 406: frequently asked questions
Where is the 406 area code located?
The 406 area code is located in Montana, centered on Billings. It covers Yellowstone, Missoula, Cascade, Gallatin, Silver Bow, Lewis And Clark and nearby communities including Billings, Missoula, Great Falls, Bozeman, Butte, Helena.
What time zone is 406 in?
Area code 406 is in the Mountain time zone (UTC-7 (MST) / UTC-6 (MDT)). You can see the exact current local time for Billings on the live clock above.
What cities use area code 406?
Cities and areas that use 406 include Billings, Missoula, Great Falls, Bozeman, Butte, Helena. Its primary city is Billings, MT.
Do I need to dial 1 before 406?
You generally do not need to dial a leading 1 for domestic calls to 406. Ten-digit dialing (the 406 code plus the seven-digit number) is the safest habit.
Is 406 a toll-free or scam number?
No — 406 is a normal geographic area code for Billings, not a toll-free code (toll-free codes are 800, 833, 844, 855, 866, 877 and 888). A 406 number is not inherently a scam, but the code can be spoofed. See the spam-call section above for how to tell.
What are the overlay area codes for 406?
Area code 406 does not currently have an overlay code; it is not layered on top of another code in the same area.