A 406 reads "real Montanan"
The state's only area code since 1947 — 406 is the unmistakable Big Sky credential. Every Montanan recognises it. Ranchers, Bozeman tech founders, Missoula creatives all use 406.
Live · Montana coverage · 1 codes
Montana area codes the complete map & list.
Get a 406 Montana number — Billings, Missoula, Bozeman, Great Falls, Helena or anywhere in Big Sky Country — on the phone you already own. The Treasure State's single statewide prefix on one app. Pick a 406 your customers will recognise on caller ID.
Montana has 1 active area code — 406. You can get a virtual Montana phone number from any of these area codes through CallMama without a US address or SIM card.
No US address required Works from anywhere 60-second activation
1.1MPopulation
56Counties
1Area codes
1947First assigned
MTUTC −7
60sTo activate
01 — MONTANA AT A GLANCE
Montana, by the numbers.
Montana was assigned a single area code in 1947: 406, covering the entire state. For 78 years 406 has carried all of Montana — the 4th-largest US state by area but among the smallest by population, with a single area code serving every corner from Glacier in the northwest to the Yellowstone gateway in the south.
Montana is one of only 11 US states that have never received an additional area code. With just 1.1M residents spread across 147,000 square miles (roughly 7.5 people per square mile), 406 has comfortably covered the state without need for splits or overlays.
"406" has become Montana cultural shorthand — featured on local apparel ("406 Apparel," "Live 406"), every Bozeman/Missoula craft brewery, every ranching outfit and every Glacier-Yellowstone tourism operation. Montana's outsized cultural identity is captured in those three digits.
DID YOU KNOW?
Montana is the 4th-largest US state by land area (147,040 sq mi) but ranks 44th in population. Its single 406 area code covers a territory larger than Germany — and the population density is so low (7 people per square mile) that 406 has had no need to split for 78 years.
02 — REGIONAL MAP
Montana area code region map.
Every Montana area code plotted at its primary city. Click any marker for that code's details. Overlays share geography with their parent code — they're shown offset on the map for visibility.
406Billings
03 — AREA CODES
All Montana area codes. One state.
Every Montana metro covered by a different prefix. Open any card to view its full detail page.
04 — CITIES
360+ Montana cities, one searchable list.
Find your city, find its area code, then activate a number with that prefix.
Billings406
Missoula406
Great Falls406
Bozeman406
Butte406
Helena406
Kalispell406
Belgrade406
Anaconda406
Havre406
Whitefish406
Miles City406
Livingston406
Laurel406
Lewistown406
Sidney406
Glendive406
Glasgow406
Polson406
Hamilton406
Columbia Falls406
Lockwood406
Dillon406
Red Lodge406
Cut Bank406
Conrad406
Wolf Point406
Shelby406
West Yellowstone406
Big Sky406
Big Fork406
Lolo406
05 — WHY MONTANA
Six reasons to pick a Montana number.
A local Montana prefix outperforms an out-of-state cell at every customer touchpoint.
Mountain Time alignment with Rockies
Montana sits in Mountain Time aligned with Denver, Salt Lake, Calgary. A 406 prefix tells Mountain West clients you're on their schedule.
Cover all 147,000 square miles with one prefix
406 covers Billings, Missoula, Bozeman, Great Falls, Helena, Kalispell, Butte — every Montana town. One prefix tells every Montanan you're local, regardless of how far you are from them.
STIR/SHAKEN-clean caller ID
NANPA-routed Montana numbers pass carrier authentication, so cold-call recipients see your local prefix instead of a flagged "Spam Likely" tag.
Tourism + ranching credibility
Montana's economy splits between tourism (Glacier, Yellowstone gateways) and agriculture/ranching. A 406 prefix works for both — locals recognise it as native, not transplant.
Held free if you pause
Cancel service and your Montana number is reserved free for 12 months — keep your 406 across seasonal cattle drives and snowbird patterns.
Ready to sound local in Montana?Pick your Montana area code and start receiving calls today.
Get a Montana number 06 — REACH
1.1M Montanans across every area code.
Each Montana area code covers a distinct region. Here's how the population breaks down.
Source: US Census Bureau / ACS estimates.
$70BState GDP
185KBillings metro population
$66KMedian household income
10hDrive end-to-end across Montana
07 — ACTIVATE
Three taps to a Montana number.
Pick the digits, install the app, take the first call. That's the whole sequence.
PICK A 406 NUMBER
(406) 555-▮▮▮▮
406-555-0142406-555-0317
Pick your digits
CallMama generates 10–20 available numbers in any Montana area code. Vanity patterns supported.
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Install the app
Install CallMama on the device you already use. Sign in once — your Montana number is linked.
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Start dialing
Inbound and outbound on the same device. Local Montana caller ID on every outgoing call.
08 — EVERY US AREA CODE
Browse every US area code.
Search by state, city, or number — then click any code to open its detail page. Montana is in here too.
List of USA States and Their Area Codes
| State | Area Codes | Time Zone | Count |
|---|---|---|---|
| Alabama | 205251256334659938 | CT | 6 |
| Alaska | 907 | AKT | 1 |
| Arizona | 480520602623928 | MST | 5 |
| Arkansas | 479501870 | CT | 3 |
| California | 213310408415510619650714818916 | PT | 10 |
| Colorado | 303719720970 | MT | 4 |
| Connecticut | 203475860959 | ET | 4 |
| Delaware | 302 | ET | 1 |
| District of Columbia | 202 | ET | 1 |
| Florida | 239305321407561727786813850904954 | ET* | 11 |
| Georgia | 229404470478678706762770912 | ET | 9 |
| Hawaii | 808 | HST | 1 |
| Idaho | 208986 | MT* | 2 |
| Illinois | 217224309312331618630708773779815847872 | CT | 13 |
| Indiana | 219260317463574765812930 | ET* | 8 |
| Iowa | 319515563641712 | CT | 5 |
| Kansas | 316620785913 | CT* | 4 |
| Kentucky | 270364502606859 | ET* | 5 |
| Louisiana | 225318337504985 | CT | 5 |
| Maine | 207 | ET | 1 |
| Maryland | 240301410443667 | ET | 5 |
| Massachusetts | 339351413508617774781857978 | ET | 9 |
| Michigan | 231248269313517586616734810906947989 | ET* | 12 |
| Minnesota | 218320507612651763952 | CT | 7 |
| Mississippi | 228601662769 | CT | 4 |
| Missouri | 314417573636660816 | CT | 6 |
| Montana | 406 | MT | 1 |
| Nebraska | 308402531 | CT* | 3 |
| Nevada | 702725775 | PT | 3 |
| New Hampshire | 603 | ET | 1 |
| New Jersey | 201551609732848856862908973 | ET | 9 |
| New Mexico | 505575 | MT | 2 |
| New York | 212315332347516518585607631646680716718838845914917929934 | ET | 19 |
| North Carolina | 252336704743828910919980984 | ET | 9 |
| North Dakota | 701 | CT* | 1 |
| Ohio | 216234330380419440513567614740937 | ET | 11 |
| Oklahoma | 405539580918 | CT | 4 |
| Oregon | 458503541971 | PT* | 4 |
| Pennsylvania | 215267272412445484570610717724814878 | ET | 12 |
| Rhode Island | 401 | ET | 1 |
| South Carolina | 803843854864 | ET | 4 |
| South Dakota | 605 | CT* | 1 |
| Tennessee | 423615629731865901931 | CT* | 7 |
| Texas | 210214254281325346361409430432469512682713737806817830832903 | CT* | 20 |
| Utah | 385435801 | MT | 3 |
| Vermont | 802 | ET | 1 |
| Virginia | 276434540571703757804 | ET | 7 |
| Washington | 206253360425509564 | PT | 6 |
| West Virginia | 304681 | ET | 2 |
| Wisconsin | 262414534608715920 | CT | 6 |
| Wyoming | 307 | MT | 1 |
| Puerto Rico | 787939 | AST | 2 |
Showing all 52 states & territories* State spans multiple time zones — code-level zone may differ.
09 — ANSWERS
Frequently asked questions about Montana area codes.
What is Montana's area code?
406 — assigned in 1947 when the NANP launched. It has been Montana's only area code for 78 years, covering Billings, Missoula, Bozeman, Great Falls, Helena, Butte, Kalispell and every town across Big Sky Country.
Does Montana have only one area code?
Yes. Montana has never been split or overlaid — 406 covers the entire state. Montana is one of only 11 US states with a single original area code, and its low population density (7 people per square mile) means 406 has number capacity for years to come.
What area code is Billings Montana?
406 — covers Billings (Montana's largest city), Missoula, Bozeman, Great Falls, Helena, Butte, Kalispell, Whitefish, Glasgow, Miles City — every town in the state. Yellowstone County uses 406 just like the rest of Montana.
What area code is Bozeman and Missoula?
406 — covers both Bozeman (Montana State University, the Bridger Mountains) and Missoula (University of Montana, the Bitterroot Valley), plus every other Montana city.
Why does Montana have only one area code?
Montana is the 4th-largest US state by land area but ranks 44th in population (1.1M). With just 7 people per square mile, 406 has comfortably served the entire state for 78 years without need for additional codes.
Can I get a Montana number if I don't live in MT?
Yes. CallMama doesn't require a Montana billing address or proof of in-state residency. Pick a 406 Montana number from anywhere in the world — useful for ranching businesses, Yellowstone-gateway operators, and Montana-connected investors.
Will my outbound calls show a Montana prefix?
Yes. Every outbound call displays your 406 area code on the recipient's caller ID — Billings residents, Bozeman tech professionals and Glacier-area outfitters all see a familiar prefix.
Can I port my existing Montana number to CallMama?
Yes. Any MT number from CenturyLink, Verizon, AT&T, T-Mobile or any other US carrier can be ported in. Porting typically completes in 3–7 business days.
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