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Area Code 406 Location & Details

State / Region: Montana • Country: United States

Major Cities Covered: Billings, Missoula, Great Falls, Bozeman, Butte-Silver Bow (balance), Helena, Kalispell, Belgrade, Anaconda-Deer Lodge County, Whitefish

Standard Dial Format
+1 (406) XXX-XXXX
Country Code: +1 (NANP Format)
What State is Area Code 406?
MontanaState Hub →
Country Territory
United States
406 Area Code Time Zone
Mountain
406 Overlay Codes
No Overlays

Area Code 406 Geographic Map

Interactive location bounds and coverage area for Montana (Mountain Timezone)

Lat: 46.96° • Lng: -110.74°
📍 Geographic Center: MontanaMap data © OpenStreetMap contributors

Where is Area Code 406 Located?

Telephone area code 406 is assigned to Montana in United States. It serves cities and metropolitan communities including Billings, Missoula, Great Falls, Bozeman, Butte-Silver Bow (balance), Helena, Kalispell, Belgrade, Anaconda-Deer Lodge County, Whitefish.

Historical Context & Area Code Overlay Information:406 serves Montana (United States).

For local and long-distance calls within area code 406, standard 10-digit dialing (406) XXX-XXXX applies.

Who Called Me from Area Code 406?

Received an unknown call, missed call, or text scam from area code 406? Here is how to trace who is calling from 406 area code and verify unknown numbers safely:

1.
Identify Missed Calls & Voicemails:

Legitimate contacts usually leave a detailed voicemail or caller ID record.

2.
Watch Out for Neighbor Spoofing:

Robocallers often fake incoming caller ID numbers using your local 406 prefix to boost pick-up rates.

3.
Reverse Phone Lookup Area Code 406:

Search public white-pages or use caller intelligence guides before returning unfamiliar calls.

Learn How Reverse Phone Lookups Work→

How to Call Area Code 406 & Dialing Format

When placing a phone call to a number in area code 406, follow the correct dialing format depending on your calling location:

  • Calling from inside the US / Canada (+1): Dial 1 + (406) + 7-digit number.
  • Calling from an international location outside +1: Dial your country's international exit code (e.g. 011 in US or + on mobile) + 1 + 406 + 7-digit number.
  • Do I need to dial area code 406 for local calls? Yes, 10-digit dialing (area code + line number) is mandatory across North American telephone networks.

Top Cities & Municipalities Served in Area Code 406

Urban centers, census places, and communities within the +1-406 calling area

50 Major Cities Listed
City NameCountyPopulation% of 406 Pop
BillingsYellowstone County121,23920.5%
MissoulaMissoula County78,90313.4%
Great FallsCascade County60,20810.2%
BozemanGallatin County58,81410.0%
Butte-Silver Bow (balance)Silver Bow County35,4696.0%
HelenaJefferson County35,1386.0%
KalispellFlathead County31,8515.4%
BelgradeGallatin County13,1072.2%
Anaconda-Deer Lodge CountyDeer Lodge County9,7091.6%
WhitefishFlathead County9,3581.6%
LivingstonPark County9,2901.6%
HavreHill County9,2641.6%
Miles CityCuster County8,4501.4%
LaurelCarbon County7,2051.2%
SidneyRichland County6,2171.1%
LewistownFergus County6,1791.0%
Columbia FallsFlathead County5,7531.0%
PolsonLake County5,6531.0%
HamiltonRavalli County5,4510.9%
GlendiveDawson County4,7360.8%

Counties Covered by Area Code 406

Geographic county distribution and population coverage across Montana

County NameTotal Population% of 406 Area% of County
Yellowstone County171,54820.5%71%
Missoula County122,47113.4%64%
Gallatin County127,49812.5%58%
Cascade County84,66810.2%71%
Flathead County114,3678.0%41%
Jefferson County13,2316.6%100%
Silver Bow County36,0916.0%98%
Carbon County11,5041.7%86%
Deer Lodge County9,7661.6%99%
Park County18,1731.6%51%
Hill County16,1151.6%57%
Custer County11,9771.4%71%
Lake County33,3831.3%24%
Ravalli County48,0371.3%16%
Richland County11,0711.1%56%
Fergus County11,8261.0%52%
Pondera County6,0650.9%89%
Dawson County8,7390.8%54%
Lincoln County22,1470.8%22%
Beaverhead County9,9900.7%43%
Broadwater County8,2890.7%51%
Big Horn County12,8470.6%29%
Toole County5,1530.6%64%
Rosebud County8,2180.6%46%
Valley County7,3850.5%43%
Powell County7,1210.5%42%
McCone County1,7150.4%100%
Musselshell County5,4520.4%38%
Stillwater County9,4290.3%21%
Phillips County4,1960.3%44%
Teton County6,4390.3%28%
Fallon County2,9600.3%60%
Sweet Grass County3,8180.3%44%
Sheridan County3,4780.3%47%
Sanders County13,8920.3%11%
Chouteau County5,8530.2%24%
Mineral County5,1870.2%24%

☎️Area Code 406 Exchange Prefixes & Carriers

Showing 50 of 768 central office 3-digit prefixes and assigned telecom carriers

66% Landline27% Wireless7% VoIP
PrefixLine UsageRate CenterAssigned CarrierAssign Date
(406) 200-📞LandlineBILLINGSTELEPORT COMMUNICATIONS AMERICA MT - LLC04/17/2012
(406) 201-📱WirelessFORSYTHNEW CINGULAR WIRELESS PCS, LLC01/21/2003
(406) 202-📱WirelessHELENANEW CINGULAR WIRELESS PCS, LLC04/18/2001
(406) 203-📞LandlineMISSOULALEVEL 3 COMMUNICATIONS, LLC - MTN/A
(406) 204-📞LandlineHELENALEVEL 3 COMMUNICATIONS, LLC - MTN/A
(406) 205-📞LandlineGREATFALLSLEVEL 3 COMMUNICATIONS, LLC - MTN/A
(406) 206-📞LandlineBILLINGSLEVEL 3 COMMUNICATIONS, LLC - MTN/A
(406) 207-📱WirelessMISSOULANEW CINGULAR WIRELESS PCS, LLC04/18/2001
(406) 208-📱WirelessBILLINGSNEW CINGULAR WIRELESS PCS, LLC04/18/2001
(406) 209-📱WirelessBOZEMANNEW CINGULAR WIRELESS PCS, LLC04/18/2001
(406) 210-📱WirelessSEELEYLAKECELLCO PARTNERSHIP DBA VERIZON WIRELESS - MTN/A
(406) 211-📞LandlineXXXXXXXXXXMULTIPLE OCN LISTINGN/A
(406) 212-📱WirelessKALISPELLNEW CINGULAR WIRELESS PCS, LLC04/18/2001
(406) 213-📞LandlineCOLSTRIPLEVEL 3 COMMUNICATIONS, LLC - MT05/06/2003
(406) 214-📱WirelessMISSOULACELLCO PARTNERSHIP DBA VERIZON WIRELESS - MTN/A
(406) 215-📞LandlineMISSOULASKYE TELECOM LLC DBA SKYETELN/A
(406) 216-📞LandlineGREATFALLS3 RIVERS TELEPHONE COOPERATIVE, INC. - MTN/A
(406) 217-📱WirelessGREATFALLSCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MTN/A
(406) 218-📱WirelessMISSOULAT-MOBILE USA, INC.08/03/2004
(406) 219-💻VoIPBOZEMANBANDWIDTH.COM CLEC, LLC - MT02/13/2003
(406) 220-📱WirelessLIVINGSTONNEW CINGULAR WIRELESS PCS, LLCN/A
(406) 221-💻VoIPBUTTEONVOY, LLC - MT02/13/2003
(406) 222-📞LandlineLIVINGSTONQWEST CORPORATIONN/A
(406) 223-📱WirelessLIVINGSTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MTN/A
(406) 224-📱WirelessLIVINGSTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MTN/A
(406) 225-📞LandlineBOULDERQWEST CORPORATIONN/A
(406) 226-📞LandlineEGLACIERPKQWEST CORPORATIONN/A
(406) 227-📞LandlineHELENAQWEST CORPORATIONN/A
(406) 228-📞LandlineGLASGOWNEMONT TEL COOP INCN/A
(406) 229-📱WirelessCUT BANKNEW CINGULAR WIRELESS PCS, LLC01/20/2003
(406) 230-📱WirelessGLASGOWCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MTN/A
(406) 231-📱WirelessGREATFALLSNEW CINGULAR WIRELESS PCS, LLC07/12/2001
(406) 232-📞LandlineMILES CITYQWEST CORPORATIONN/A
(406) 233-📞LandlineMILES CITYQWEST CORPORATIONN/A
(406) 234-📞LandlineMILES CITYMID-RIVERS TELEPHONE COOPERATIVE, INC.N/A
(406) 235-📞LandlineWOLF CREEKQWEST CORPORATIONN/A
(406) 236-📞LandlineNEIHART3 RIVERS TEL. COOP., INC.N/A
(406) 237-📞LandlineBILLINGSQWEST CORPORATIONN/A
(406) 238-📞LandlineBILLINGSQWEST CORPORATIONN/A
(406) 239-📱WirelessMISSOULANEW CINGULAR WIRELESS PCS, LLCN/A
(406) 240-📱WirelessMISSOULANEW CINGULAR WIRELESS PCS, LLCN/A
(406) 241-📱WirelessMISSOULANEW CINGULAR WIRELESS PCS, LLCN/A
(406) 242-📱WirelessTHOMPSNFLSNEW CINGULAR WIRELESS PCS, LLC03/18/2003
(406) 243-📞LandlineMISSOULAQWEST CORPORATIONN/A
(406) 244-📞LandlinePOTOMACBLACKFOOT TEL. COOP., INC.N/A
(406) 245-📞LandlineBILLINGSQWEST CORPORATIONN/A
(406) 246-📞LandlineDIXONBLACKFOOT TEL. COOP., INC.N/A
(406) 247-📞LandlineBILLINGSQWEST CORPORATIONN/A
(406) 248-📞LandlineBILLINGSQWEST CORPORATIONN/A
(406) 249-📱WirelessKALISPELLCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MTN/A

Frequently Asked Questions about Area Code 406

Where is area code 406 located?

Area code 406 is located in Montana (United States), serving cities like Billings, Missoula, Great Falls, Bozeman, Butte-Silver Bow (balance), Helena, Kalispell, Belgrade, Anaconda-Deer Lodge County, Whitefish.

What timezone is area code 406?

Area code 406 operates in the Mountain timezone.

What state is area code 406?

Area code 406 is assigned to the state / telecom territory of Montana.

Is area code 406 a scam or dangerous?

Area code 406 is an official geographic area code for Montana. However, beware of robocaller spoofing.

Montana State Area Codes

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Get a 406 Business Phone Number

How to acquire a virtual phone number or business line with area code 406 for local customer trust in Montana.

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