406 Area Code: Location, Cities, Map And Time Zone

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Area code 406 is in Montana, USA , spanning 56 counties and serving 360 cities , including Billings, Missoula or Great Falls; it currently uses 752 prefixes , assigned from 406-200-XXXX through 406-999-XXXX.

In service date for area code 406: January 01, 1947.

The current local time is .

406 area code location on a map
© OpenStreetMap contributorsFor exact NPA boundaries see official 406 area code map

Phone number lookup

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Locate any 406-NXX prefix:

406-200-XXXX --- 406-299-XXXX
NPANXX Carrier1 Area Served2 Date3
406-200 Teleport Communications America MT Billings 4/17/2012
406-201 New Cingular Wireless PCS Forsyth 1/21/2003
406-202 New Cingular Wireless PCS Helena 4/18/2001
406-203 Level 3 Communications Missoula N/A
406-204 Level 3 Communications Helena N/A
406-205 Level 3 Communications Great Falls N/A
406-206 Level 3 Communications Billings N/A
406-207 New Cingular Wireless PCS Missoula 4/18/2001
406-208 New Cingular Wireless PCS Billings 4/18/2001
406-209 New Cingular Wireless PCS Bozeman 4/18/2001
406-210 Cellco Partnership Seeley Lake N/A
406-212 New Cingular Wireless PCS Kalispell 4/18/2001
406-213 Level 3 Communications Colstrip 5/6/2003
406-214 Cellco Partnership Missoula N/A
406-215 Skye Telecom Missoula N/A
406-216 3 Rivers Telephone Cooperative Great Falls N/A
406-217 Cellco Partnership Great Falls N/A
406-218 T-Mobile USA Missoula 8/3/2004
406-219 Bandwidth.com Clec Bozeman 2/13/2003
406-220 New Cingular Wireless PCS Livingston N/A
406-221 Onvoy Butte 2/13/2003
406-222 Qwest Corporation Livingston N/A
406-223 Cellco Partnership Livingston N/A
406-224 Cellco Partnership Livingston N/A
406-225 Qwest Corporation Boulder N/A
406-226 Qwest Corporation East Glacier Park N/A
406-227 Qwest Corporation Helena N/A
406-228 Nemont Tel Coop Inc Glasgow N/A
406-229 New Cingular Wireless PCS Cut Bank 1/20/2003
406-230 Cellco Partnership Glasgow N/A
406-231 New Cingular Wireless PCS Great Falls 7/12/2001
406-232 Qwest Corporation Miles City N/A
406-233 Qwest Corporation Miles City N/A
406-234 Mid-Rivers Telephone Cooperative Miles City N/A
406-235 Qwest Corporation Wolf Creek N/A
406-236 3 Rivers Tel. Coop. Neihart N/A
406-237 Qwest Corporation Billings N/A
406-238 Qwest Corporation Billings N/A
406-239 New Cingular Wireless PCS Missoula N/A
406-240 New Cingular Wireless PCS Missoula N/A
406-241 New Cingular Wireless PCS Missoula N/A
406-242 New Cingular Wireless PCS Thompson Falls 3/18/2003
406-243 Qwest Corporation Missoula N/A
406-244 Blackfoot Tel. Coop. Potomac N/A
406-245 Qwest Corporation Billings N/A
406-246 Blackfoot Tel. Coop. Dixon N/A
406-247 Qwest Corporation Billings N/A
406-248 Qwest Corporation Billings N/A
406-249 Cellco Partnership Kalispell N/A
406-250 Cellco Partnership Kalispell N/A
406-251 Qwest Corporation Missoula N/A
406-252 Qwest Corporation Billings N/A
406-253 New Cingular Wireless PCS Kalispell N/A
406-254 Qwest Corporation Billings N/A
406-255 Qwest Corporation Billings N/A
406-256 Qwest Corporation Billings N/A
406-257 Centurytel Of Montana Kalispell N/A
406-258 Qwest Corporation Missoula N/A
406-259 Qwest Corporation Billings N/A
406-260 New Cingular Wireless PCS Kalispell N/A
406-261 New Cingular Wireless PCS Kalispell N/A
406-262 Qwest Corporation Havre N/A
406-263 Sagebrush Cellular Glasgow N/A
406-264 3 Rivers Tel. Coop. Fort Shaw N/A
406-265 Qwest Corporation Havre N/A
406-266 Qwest Corporation Townsend N/A
406-267 Southern Montana Tel. Co. Divide N/A
406-268 Qwest Corporation Great Falls N/A
406-269 New Cingular Wireless PCS St Regis 10/12/2010
406-270 Cellco Partnership Kalispell N/A
406-271 3 Rivers Telephone Cooperative Conrad N/A
406-272 Onvoy Billings N/A
406-273 Qwest Corporation Missoula N/A
406-274 Teleport Communications America MT Missoula N/A
406-275 Ronan Tel. Co. Pablo N/A
406-276 3 Rivers Tel. Coop. Lima N/A
406-277 3 Rivers Tel. Coop. Belt N/A
406-278 Qwest Corporation Conrad N/A
406-279 3 Rivers Tel. Coop. Valier N/A
406-280 New Cingular Wireless PCS St Regis 3/18/2003
406-281 Teleport Communications America MT Billings N/A
406-282 Qwest Corporation Manhattan N/A
406-283 Ziply Fiber Montana Libby N/A
406-284 Qwest Corporation Manhattan N/A
406-285 Qwest Corporation Three Forks N/A
406-286 Nemont Tel Coop Inc Reserve N/A
406-287 Qwest Corporation Whitehall N/A
406-288 Blackfoot Tel. Coop. Drummond N/A
406-289 New Cingular Wireless PCS Conrad N/A
406-290 Onvoy Columbus 3/14/2007
406-291 Cellco Partnership Libby N/A
406-292 Triangle Tel. Coop. Assn. Joplin N/A
406-293 Ziply Fiber Montana Libby N/A
406-294 Electric Lightwave Billings N/A
406-295 Ziply Fiber Montana Troy N/A
406-296 Ziply Fiber Montana Eureka N/A
406-297 Interbel Telephone Cooperative Eureka Rural N/A
406-298 Cellco Partnership Columbus N/A
406-299 Level 3 Communications Butte 1/23/2003
406-300-XXXX --- 406-399-XXXX
NPANXX Carrier1 Area Served2 Date3
406-300 Charter IP Enabled Services Kalispell 7/17/2013
406-301 Cellco Partnership Malta 5/6/2008
406-302 Onvoy Wolf Creek 10/3/2011
406-303 Teleport Communications America MT Missoula 4/17/2012
406-304 T-Mobile USA Missoula 3/25/2016
406-305 New Cingular Wireless PCS White Sulphur Springs 10/20/2010
406-306 Onvoy Manhattan 10/20/2017
406-307 Charter IP Enabled Services Canyon Creek 03/18/2025
406-308 Cellco Partnership Cascade 9/5/2017
406-309 Charter IP Enabled Services Kalispell 7/1/2011
406-310 Blackfoot Communications Butte N/A
406-312 Nuso Bozeman N/A
406-313 Onvoy Boulder 11/16/2012
406-314 New Cingular Wireless PCS Kalispell 10/21/2004
406-315 Sagebrush Cellular Great Falls N/A
406-316 Onvoy Boulder 7/12/2019
406-317 Telnyx Missoula N/A
406-318 Onvoy Billings 2/17/2011
406-319 Charter IP Enabled Services Polson N/A
406-320 Cellco Partnership Roundup N/A
406-321 New Cingular Wireless PCS Columbus N/A
406-322 Qwest Corporation Columbus N/A
406-323 Mid-Rivers Tel. Coop. Roundup N/A
406-324 Qwest Corporation Helena N/A
406-325 Nuso Billings N/A
406-326 Triangle Tel. Coop. Assn. Reed Point N/A
406-327 Qwest Corporation Missoula N/A
406-328 Project Tel. Co. Absarokee N/A
406-329 Qwest Corporation Missoula N/A
406-330 Charter IP Enabled Services Clinton N/A
406-331 Cellco Partnership Roundup N/A
406-332 Blackfoot Tel. Coop. Pablo N/A
406-333 Qwest Corporation Livingston N/A
406-334 New Cingular Wireless PCS Libby 5/10/2004
406-335 Northern Tel. Coop. Sweet Grass N/A
406-336 Northern Tel. Coop. North Cut Bank N/A
406-337 Northern Tel. Coop. Kevin-Oilmont N/A
406-338 Siyeh Communications Browning N/A
406-339 Northern Tel. Coop. Ethridge N/A
406-340 New Cingular Wireless PCS Lima N/A
406-341 Onvoy Manhattan 7/6/2020
406-342 Range Tel Coop Inc Hysham N/A
406-343 Project Tel. Co. Wyola N/A
406-344 Cellco Partnership Havre 7/28/2016
406-345 Mid-Rivers Telephone Cooperative Glendive N/A
406-346 Range Telephone Cooperative Forsyth 7/11/2002
406-347 Range Tel Coop Inc Rosebud N/A
406-348 Project Tel. Co. Huntley N/A
406-349 Blackfoot Tel. Coop. Alta N/A
406-350 New Cingular Wireless PCS Lewistown N/A
406-351 Cellco Partnership Forsyth N/A
406-352 Triangle Tel. Coop. Assn. Box Elder N/A
406-353 Triangle Tel. Coop. Assn. Harlem N/A
406-354 Mid-Rivers Tel. Coop. Rock Springs N/A
406-355 Triangle Tel. Coop. Assn. Rudyard N/A
406-356 Qwest Corporation Forsyth N/A
406-357 Triangle Tel. Coop. Assn. Chinook N/A
406-358 Mid-Rivers Tel. Coop. Melstone N/A
406-359 Qwest Corporation Glendive N/A
406-360 Cellco Partnership Hamilton N/A
406-361 Cellco Partnership Hamilton 6/9/2011
406-362 Lincoln Tel. Co. Lincoln N/A
406-363 Qwest Corporation Hamilton N/A
406-364 Nemont Tel Coop Inc Hinsdale N/A
406-365 Qwest Corporation Glendive N/A
406-366 Cellco Partnership Lewistown N/A
406-367 Nemont Tel Coop Inc North Glasgow N/A
406-368 Lincoln Tel. Co. Canyon Creek N/A
406-369 New Cingular Wireless PCS Hamilton N/A
406-370 Cellco Partnership Missoula N/A
406-371 MCIMetro Access Transmission Services Billings 7/27/2004
406-372 Triangle Tel. Coop. Assn. Kremlin N/A
406-373 Qwest Corporation Billings N/A
406-374 Triangle Tel. Coop. Assn. Moore N/A
406-375 Qwest Corporation Hamilton N/A
406-376 Triangle Tel. Coop. Assn. Gildford N/A
406-377 Mid-Rivers Telephone Cooperative Glendive N/A
406-378 Triangle Tel. Coop. Assn. Big Sandy N/A
406-379 Triangle Tel. Coop. Assn. Turner N/A
406-380 Cellco Partnership Lewistown N/A
406-381 Cellco Partnership Hamilton N/A
406-382 New Cingular Wireless PCS Superior 3/18/2003
406-383 Triangle Tel. Coop. Assn. Dodson N/A
406-384 Electric Lightwave Billings N/A
406-385 Nemont Tel Coop Inc Westby N/A
406-386 Triangle Tel. Coop. Assn. Hopp-Illiad N/A
406-387 Centurytel Of Montana Hungry Horse N/A
406-388 Qwest Corporation Belgrade N/A
406-389 Centurylink Communications Helena 9/18/2013
406-390 Cellco Partnership South Havre N/A
406-391 New Cingular Wireless PCS Cut Bank N/A
406-392 Nemont Tel Coop Inc North Wolf Point N/A
406-393 Charter IP Enabled Services Somers 3/30/2006
406-394 Triangle Tel. Coop. Assn. North Havre N/A
406-395 Triangle Tel. Coop. Assn. South Havre N/A
406-396 Cellco Partnership Missoula 11/26/2003
406-397 Triangle Tel. Coop. Assn. Hingham N/A
406-398 Triangle Tel. Coop. Assn. North Havre N/A
406-399 Cellco Partnership South Havre N/A
406-400-XXXX --- 406-499-XXXX
NPANXX Carrier1 Area Served2 Date3
406-400 Triangle Communication System Havre 4/27/2017
406-401 Csc Wireless Great Falls 5/29/2019
406-402 T-Mobile USA Great Falls 8/4/2017
406-403 Onvoy Great Falls 3/8/2006
406-404 Charter IP Enabled Services Bozeman 4/3/2012
406-405 Onvoy Libby 9/8/2022
406-406 Livewire Telecom Missoula 12/09/2024
406-407 Cellco Partnership Kalispell 8/16/2010
406-408 Cellco Partnership Hays 10/15/2019
406-409 Csc Wireless Billings 5/29/2019
406-410 Cellco Partnership Helena N/A
406-412 Onvoy Billings 5/22/2017
406-413 Qwest Corporation Billings 5/12/2015
406-414 Qwest Corporation Bozeman 12/7/2011
406-415 Charter IP Enabled Services Deer Lodge 4/9/2010
406-416 Onvoy Forsyth 6/17/2020
406-417 New Cingular Wireless PCS Helena 5/28/2008
406-418 Onvoy Cooke City 8/20/2019
406-419 Onvoy Victor 7/12/2019
406-420 Charter IP Enabled Services Bigfork 2/28/2006
406-421 Range Tel Coop Inc South Miles City N/A
406-422 Charter IP Enabled Services Helena N/A
406-423 Triangle Tel. Coop. Assn. Hobson N/A
406-424 3 Rivers Telephone Cooperative Shelby 11/12/2001
406-425 Cellco Partnership Red Lodge N/A
406-426 Cellco Partnership Red Lodge N/A
406-427 Range Tel Coop Inc South Broadus N/A
406-428 Mid-Rivers Tel. Coop. Grass Range N/A
406-429 Mid-Rivers Tel. Coop. Winnett N/A
406-430 Onvoy Helena N/A
406-431 Cellco Partnership Helena N/A
406-432 Northern Tel. Coop. Devon N/A
406-433 Mid-Rivers Telephone Cooperative Sidney N/A
406-434 Qwest Corporation Shelby N/A
406-435 Tds Metrocom Billings N/A
406-436 Range Tel Coop Inc Broadus N/A
406-437 MCIMetro Access Transmission Services Helena 7/27/2004
406-438 Cellco Partnership Helena 2/6/2014
406-439 New Cingular Wireless PCS Helena N/A
406-440 3 Rivers Telephone Cooperative Helena 7/1/2005
406-441 Qwest Corporation Helena N/A
406-442 Qwest Corporation Helena N/A
406-443 Qwest Corporation Helena N/A
406-444 Qwest Corporation Helena N/A
406-445 Qwest Corporation Red Lodge N/A
406-446 Qwest Corporation Red Lodge N/A
406-447 Qwest Corporation Helena N/A
406-448 Nemont Tel Coop Inc North Poplar N/A
406-449 Qwest Corporation Helena N/A
406-450 Cellco Partnership Shelby N/A
406-451 T-Mobile USA Bozeman 8/4/2004
406-452 Qwest Corporation Great Falls N/A
406-453 Qwest Corporation Great Falls N/A
406-454 Qwest Corporation Great Falls N/A
406-455 Yorkstream Communications Great Falls N/A
406-456 Triangle Tel. Coop. Assn. South Chester N/A
406-457 Qwest Corporation Helena N/A
406-458 Qwest Corporation Helena N/A
406-459 Cellco Partnership Helena N/A
406-460 New Cingular Wireless PCS Shelby N/A
406-461 Cellco Partnership Helena N/A
406-462 Triangle Tel. Coop. Assn. Winifred N/A
406-463 3 Rivers Tel. Coop. Power N/A
406-464 Mid-Rivers Tel. Coop. Roy N/A
406-465 Cellco Partnership Helena N/A
406-466 3 Rivers Tel. Coop. Choteau N/A
406-467 3 Rivers Tel. Coop. Fairfield N/A
406-468 Qwest Corporation Cascade N/A
406-469 3 Rivers Tel. Coop. Pendroy N/A
406-470 Cellco Partnership Shelby N/A
406-471 Cellco Partnership Kalispell 6/1/2005
406-472 3 Rivers Tel. Coop. Dupuyer N/A
406-473 Triangle Tel. Coop. Assn. Judith Gap N/A
406-474 Nemont Tel Coop Inc Flaxville N/A
406-475 Qwest Corporation Helena N/A
406-476 Qwest Corporation Dutton N/A
406-477 Range Tel Coop Inc Lame Deer N/A
406-478 Cellco Partnership Sidney N/A
406-479 Cellco Partnership Butte 10/3/2013
406-480 Cellco Partnership Sidney N/A
406-481 Cellco Partnership Missoula 06/21/2023
406-482 Qwest Corporation Sidney N/A
406-483 Nemont Tel Coop Inc Dagmar N/A
406-484 Tri-County Tel. Assn. Crooked Creek N/A
406-485 Mid-Rivers Tel. Coop. Circle N/A
406-486 Mid-Rivers Tel. Coop. Fallon N/A
406-487 Nemont Tel Coop Inc Scobey N/A
406-488 Mid-Rivers Telephone Cooperative Sidney N/A
406-489 New Cingular Wireless PCS Sidney N/A
406-490 Cellco Partnership Butte N/A
406-491 New Cingular Wireless PCS Butte N/A
406-492 Blackfoot Tel. Coop. Avon N/A
406-493 Charter IP Enabled Services Missoula N/A
406-494 Qwest Corporation Butte N/A
406-495 Qwest Corporation Helena N/A
406-496 Qwest Corporation Butte N/A
406-497 Qwest Corporation Butte N/A
406-498 Cellco Partnership Butte N/A
406-499 New Cingular Wireless PCS Seeley Lake 3/18/2003
406-500-XXXX --- 406-599-XXXX
NPANXX Carrier1 Area Served2 Date3
406-500 Fractel Billings 1/29/2019
406-501 Onvoy Whitehall 8/20/2019
406-502 Charter IP Enabled Services Helena 4/3/2012
406-503 Comcast IP Phone Billings 04/05/2023
406-504 Level 3 Communications Fairfield 2/12/2021
406-505 New Cingular Wireless PCS Conrad 10/14/2010
406-506 HD Carrier Billings 6/1/2020
406-507 Level 3 Communications Whitefish 02/17/2023
406-508 Level 3 Communications Frenchtown 2/3/2012
406-510 Onvoy Missoula 3/22/2017
406-512 Level 3 Communications Boulder 02/22/2023
406-513 Charter IP Enabled Services Helena 4/8/2008
406-514 New Cingular Wireless PCS Culbertson 10/20/2010
406-515 New Cingular Wireless PCS Superior 10/12/2010
406-516 Dish Wireless Laurel 04/27/2023
406-517 Cellco Partnership Livingston 06/07/2024
406-518 Onvoy Gallatin Gateway 9/27/2011
406-519 Ip Horizon Missoula N/A
406-520 HD Carrier Absarokee N/A
406-521 Cellco Partnership Townsend N/A
406-522 Qwest Corporation Bozeman N/A
406-523 Qwest Corporation Missoula N/A
406-524 Nemont Tel Coop Inc Valley Industrial Park N/A
406-525 Mid-Rivers Tel. Coop. South Wolf Point N/A
406-526 Nemont Tel Coop Inc Fort Peck N/A
406-527 Nemont Tel Coop Inc Saco N/A
406-528 Ronan Tel. Co. Ronan N/A
406-529 Cellco Partnership Missoula 9/16/2005
406-530 Level 3 Communications Laurel N/A
406-531 Cellco Partnership Missoula N/A
406-532 Blackfoot Communications Missoula N/A
406-533 Qwest Corporation Butte N/A
406-534 Charter IP Enabled Services Billings N/A
406-535 Mid-Rivers Telephone Cooperative Lewistown N/A
406-536 New Cingular Wireless PCS Bozeman 12/18/2024
406-537 Triangle Tel. Coop. Assn. Melville N/A
406-538 Qwest Corporation Lewistown N/A
406-539 New Cingular Wireless PCS Bozeman N/A
406-540 Onvoy Missoula N/A
406-541 Blackfoot Communications Missoula N/A
406-542 Qwest Corporation Missoula N/A
406-543 Qwest Corporation Missoula N/A
406-544 Cellco Partnership Missoula N/A
406-545 Level 3 Communications Billings 6/19/2002
406-546 Cellco Partnership Missoula N/A
406-547 Triangle Tel. Coop. Assn. White Sulphur Springs N/A
406-548 Qwest Corporation Bozeman N/A
406-549 Qwest Corporation Missoula N/A
406-550 Nuso Missoula N/A
406-551 Level 3 Communications Bozeman 6/19/2002
406-552 Level 3 Communications Missoula 6/19/2002
406-553 New Cingular Wireless PCS Divide N/A
406-554 Range Tel Coop Inc North Broadus N/A
406-556 Qwest Corporation Bozeman N/A
406-557 Mid-Rivers Tel. Coop. Jordan N/A
406-558 MCIMetro Access Transmission Services Helena 6/19/2002
406-559 Cellco Partnership Anaconda N/A
406-560 Cellco Partnership Anaconda N/A
406-561 T-Mobile USA Billings 8/2/2017
406-562 3 Rivers Tel. Coop. Augusta N/A
406-563 Qwest Corporation Anaconda N/A
406-564 Level 3 Communications Great Falls 6/19/2002
406-565 Level 3 Communications Butte 6/19/2002
406-566 Triangle Tel. Coop. Assn. Stanford N/A
406-567 Triangle Tel. Coop. Assn. Denton N/A
406-568 Mid-Rivers Tel. Coop. Ryegate N/A
406-569 Reservation Tel. Coop. West Squaw Gap N/A
406-570 Cellco Partnership Bozeman N/A
406-571 Charter IP Enabled Services Finley Point N/A
406-572 Triangle Tel. Coop. Assn. Martinsdale N/A
406-573 Siyeh Communications Browning N/A
406-574 Qwest Corporation Silvertip N/A
406-575 Mid-Rivers Tel. Coop. North Ryegate N/A
406-576 New Cingular Wireless PCS Conrad N/A
406-577 Onvoy Bozeman N/A
406-578 Qwest Corporation Wilsall N/A
406-579 Cellco Partnership Bozeman N/A
406-580 New Cingular Wireless PCS Bozeman N/A
406-581 Cellco Partnership Bozeman N/A
406-582 Qwest Corporation Bozeman N/A
406-583 Mid-Rivers Tel. Coop. Bloomfield N/A
406-584 Mid-Rivers Tel. Coop. Lindsay N/A
406-585 Qwest Corporation Bozeman N/A
406-586 Qwest Corporation Bozeman N/A
406-587 Qwest Corporation Bozeman N/A
406-588 Mid-Rivers Tel. Coop. Carlyle N/A
406-589 T-Mobile USA Bozeman N/A
406-590 Cellco Partnership Great Falls N/A
406-591 Cellco Partnership Billings N/A
406-592 Range Tel Coop Inc Busby N/A
406-593 New Cingular Wireless PCS Butte N/A
406-594 Cellco Partnership Helena N/A
406-595 Cellco Partnership Bozeman N/A
406-596 New Cingular Wireless PCS Dillon N/A
406-597 New Cingular Wireless PCS Shelby N/A
406-598 Cellco Partnership Billings N/A
406-599 Cellco Partnership Bozeman 10/26/2004
406-600-XXXX --- 406-699-XXXX
NPANXX Carrier1 Area Served2 Date3
406-600 Cellco Partnership Bozeman 4/13/2006
406-601 Blackfoot Communications Billings 11/8/2013
406-602 Blackfoot Communications Bozeman 11/8/2013
406-603 Blackfoot Communications Helena 11/8/2013
406-604 Blackfoot Communications Great Falls 7/15/2011
406-605 Telnyx Butte 4/18/2021
406-606 Tri Tel Billings 12/7/2012
406-607 Blackfoot Communications Kalispell 11/8/2013
406-608 Ip Horizon Billings 5/6/2021
406-609 New Cingular Wireless PCS Kalispell 3/24/2021
406-610 New Cingular Wireless PCS Missoula 01/06/2025
406-612 Onvoy Swan Lake 10/11/2007
406-613 Centurylink Communications Bozeman 6/16/2022
406-614 Onvoy Bigfork 10/13/2020
406-615 Western Montana Communitytel Thompson Falls 4/28/2014
406-616 Onvoy Three Forks 7/1/2011
406-617 New Cingular Wireless PCS Billings 12/23/2024
406-618 Tds Metrocom Missoula 10/09/2025
406-620 Sagebrush Cellular Billings 12/6/2005
406-621 Cellco Partnership Fort Benton N/A
406-622 Triangle Tel. Coop. Assn. Fort Benton N/A
406-623 Commio Hardin 2/16/2005
406-624 Montana Opticom Bozeman 2/3/2005
406-625 AT&T Stevensville N/A
406-626 Qwest Corporation Frenchtown N/A
406-627 3 Rivers Tel. Coop. East Conrad N/A
406-628 Qwest Corporation Laurel N/A
406-629 Onvoy Hardin N/A
406-630 Level 3 Communications Sidney 2/16/2005
406-631 Onvoy Elmo 7/26/2007
406-632 Triangle Tel. Coop. Assn. Harlowton N/A
406-633 Qwest Corporation Laurel N/A
406-634 Onvoy Helena N/A
406-635 Mid-Rivers Tel. Coop. Terry N/A
406-636 Mid-Rivers Tel. Coop. Lavina N/A
406-637 Qwest Corporation Terry N/A
406-638 Project Tel. Co. Hardin N/A
406-639 Project Tel. Co. Lodgegrass N/A
406-640 Cellco Partnership West Yellowstone N/A
406-641 Cellco Partnership West Yellowstone N/A
406-642 Qwest Corporation Victor N/A
406-643 Onvoy North Parkman 5/24/2007
406-644 Blackfoot Tel. Coop. Charlo N/A
406-645 Onvoy Deer Lodge N/A
406-646 Qwest Corporation West Yellowstone N/A
406-647 Bandwidth.com Clec Billings 7/3/2008
406-648 Nemont Tel Coop Inc North Hinsdale N/A
406-649 Blackfoot Tel. Coop. St Regis N/A
406-650 Sagebrush Cellular Wolf Point N/A
406-651 Qwest Corporation Billings N/A
406-652 Qwest Corporation Billings N/A
406-653 Nemont Tel Coop Inc Wolf Point N/A
406-654 Triangle Tel. Coop. Assn. Malta N/A
406-655 Qwest Corporation Billings N/A
406-656 Qwest Corporation Billings N/A
406-657 Qwest Corporation Billings N/A
406-658 Triangle Tel. Coop. Assn. South Malta N/A
406-659 Qwest Corporation North Parkman N/A
406-660 New Cingular Wireless PCS Dillon N/A
406-661 Cellco Partnership Billings N/A
406-662 Qwest Corporation Bridger N/A
406-663 Triangle Tel. Coop. Assn. Rapelje N/A
406-664 Project Tel. Co. Belfry N/A
406-665 Qwest Corporation Hardin N/A
406-666 Project Tel. Co. Fort Smith N/A
406-667 Triangle Tel. Coop. Assn. Broadview N/A
406-668 Qwest Corporation Fromberg N/A
406-669 Triangle Tel. Coop. Assn. Molt N/A
406-670 Cellco Partnership Billings N/A
406-671 Cellco Partnership Billings N/A
406-672 Cellco Partnership Billings N/A
406-673 Triangle Tel. Coop. Assn. Hays N/A
406-674 Triangle Tel. Coop. Assn. Whitewater N/A
406-675 Ronan Tel. Co. Pablo N/A
406-676 Ronan Tel. Co. Ronan N/A
406-677 Blackfoot Tel. Coop. Seeley Lake N/A
406-678 Blackfoot Tel. Coop. Haugan N/A
406-679 Nuso Hardin N/A
406-680 Sagebrush Cellular Malta 1/10/2005
406-681 Southern Montana Tel. Co. Grant N/A
406-682 3 Rivers Tel. Coop. Ennis N/A
406-683 Qwest Corporation Dillon N/A
406-684 3 Rivers Tel. Coop. Twin Bridges N/A
406-685 3 Rivers Tel. Coop. Harrison N/A
406-686 Qwest Corporation Clyde Park N/A
406-687 Mid-Rivers Tel. Coop. W Glendive N/A
406-688 Sagebrush Cellular Scobey 2/10/2014
406-689 Southern Montana Tel. Co. Wisdom N/A
406-690 Cellco Partnership Billings N/A
406-691 New Cingular Wireless PCS Anaconda N/A
406-692 Onvoy Yellow Bay 10/11/2007
406-693 Qwest Corporation Warm Springs N/A
406-694 Cellco Partnership Billings 1/5/2005
406-695 Nemont Tel Coop Inc Frazer N/A
406-696 Cellco Partnership Billings 6/15/2006
406-697 Cellco Partnership Billings 4/21/2005
406-698 Cellco Partnership Billings N/A
406-699 New Cingular Wireless PCS Hardin N/A
406-702-XXXX --- 406-799-XXXX
NPANXX Carrier1 Area Served2 Date3
406-702 Charter IP Enabled Services Billings 3/7/2012
406-703 Telnyx Columbus 5/24/2021
406-707 Terra Nova Telecom Lewistown N/A
406-708 Wide Voice Lewistown 2/16/2005
406-709 Charter IP Enabled Services Lakeside N/A
406-717 Vonage America Billings 6/6/2018
406-718 Twilio International Darby 4/12/2021
406-719 Twilio International Fromberg 8/20/2019
406-720 Cellco Partnership Colstrip N/A
406-721 Qwest Corporation Missoula N/A
406-722 Blackfoot Tel. Coop. Alberton N/A
406-723 Qwest Corporation Butte N/A
406-724 Nemont Tel Coop Inc Glentana N/A
406-725 Nemont Tel Coop Inc Larslan N/A
406-726 Blackfoot Tel. Coop. Arlee N/A
406-727 Qwest Corporation Great Falls N/A
406-728 Qwest Corporation Missoula N/A
406-729 Centurylink Communications Wilsall 9/8/2016
406-730 Charter IP Enabled Services Whitefish N/A
406-731 Wavenation Great Falls N/A
406-732 Qwest Corporation St Mary N/A
406-733 3 Rivers Tel. Coop. Highwood N/A
406-734 3 Rivers Tel. Coop. Carter N/A
406-735 3 Rivers Tel. Coop. Geyser N/A
406-736 3 Rivers Tel. Coop. Stockett N/A
406-737 Triangle Tel. Coop. Assn. Geraldine N/A
406-738 3 Rivers Tel. Coop. Raynesford N/A
406-739 Triangle Tel. Coop. Assn. Loma N/A
406-740 Cellco Partnership Colstrip N/A
406-741 Hot Springs Tel. Co. Hot Springs N/A
406-742 Mid-Rivers Telephone Cooperative Fairview N/A
406-743 New Cingular Wireless PCS Laurel 9/8/2006
406-744 Western Montana Communitytel St Ignatius 11/16/2012
406-745 Blackfoot Tel. Coop. St Ignatius N/A
406-746 Nemont Tel Coop Inc Nashua N/A
406-747 Qwest Corporation Fairview N/A
406-748 Qwest Corporation Colstrip N/A
406-749 New Cingular Wireless PCS Colstrip N/A
406-750 Cellco Partnership Great Falls 8/22/2005
406-751 Centurytel Of Montana Kalispell N/A
406-752 Centurytel Of Montana Kalispell N/A
406-753 3 Rivers Tel. Coop. Brady N/A
406-754 Blackfoot Tel. Coop. Condon N/A
406-755 Centurytel Of Montana Kalispell N/A
406-756 Centurytel Of Montana Kalispell N/A
406-757 Range Tel Coop Inc Decker N/A
406-758 Centurytel Of Montana Kalispell N/A
406-759 Triangle Tel. Coop. Assn. Chester N/A
406-760 Vonage America Great Falls N/A
406-761 Qwest Corporation Great Falls N/A
406-762 Nemont Tel Coop Inc Opheim N/A
406-763 Qwest Corporation Gallatin Gateway N/A
406-764 Tri-County Tel. Assn. North Frannie N/A
406-765 Nemont Tel Coop Inc Plentywood N/A
406-766 Nemont Tel Coop Inc Froid N/A
406-767 Rt Communications Ridge N/A
406-768 Nemont Tel Coop Inc Poplar N/A
406-769 Nemont Tel Coop Inc Bainville N/A
406-770 Comcast IP Phone Great Falls N/A
406-771 Qwest Corporation Great Falls N/A
406-772 Mid-Rivers Tel. Coop. Plevna N/A
406-773 Mid-Rivers Tel. Coop. Richey N/A
406-774 Mid-Rivers Tel. Coop. Lambert N/A
406-775 Mid-Rivers Tel. Coop. Ekalaka N/A
406-776 Mid-Rivers Tel. Coop. Savage N/A
406-777 Qwest Corporation Stevensville N/A
406-778 Mid-Rivers Tel. Coop. Baker N/A
406-779 Nemont Tel Coop Inc Flaxville Rural N/A
406-780 Cellco Partnership Columbus N/A
406-781 Cellco Partnership Great Falls N/A
406-782 Qwest Corporation Butte N/A
406-783 Nemont Tel Coop Inc Scobey Rural N/A
406-784 Range Tel Coop Inc Ashland N/A
406-785 Nemont Tel Coop Inc North Nashua N/A
406-786 Nemont Tel Coop Inc Brockton N/A
406-787 Nemont Tel Coop Inc Culbertson N/A
406-788 Cellco Partnership Great Falls N/A
406-789 Nemont Tel Coop Inc Medicine Lake N/A
406-790 New Cingular Wireless PCS Culbertson N/A
406-791 Qwest Corporation Great Falls N/A
406-792 Onvoy Butte N/A
406-793 Blackfoot Tel. Coop. Ovando N/A
406-794 Onvoy Billings 3/15/2006
406-795 Qwest Corporation Wibaux N/A
406-796 Mid-Rivers Telephone Cooperative Wibaux N/A
406-797 Qwest Corporation Anaconda N/A
406-798 Mid-Rivers Tel. Coop. West Sidney N/A
406-799 New Cingular Wireless PCS Great Falls N/A
406-800-XXXX --- 406-899-XXXX
NPANXX Carrier1 Area Served2 Date3
406-800 Onvoy Bridger 12/11/2013
406-802 Cellco Partnership Hamilton N/A
406-804 Onvoy Gardiner 8/20/2019
406-807 Onvoy East Glacier Park 4/22/2021
406-808 Centurylink Communications Havre N/A
406-812 Onvoy Laurel 10/3/2011
406-813 MCIMetro Access Transmission Services Belgrade 9/14/2011
406-815 AT&T Red Lodge N/A
406-818 New Cingular Wireless PCS Red Lodge N/A
406-820 Onvoy Olney 10/11/2007
406-821 Qwest Corporation Darby N/A
406-822 Blackfoot Tel. Coop. Superior N/A
406-823 Qwest Corporation Livingston N/A
406-824 New Cingular Wireless PCS St Ignatius N/A
406-825 Blackfoot Tel. Coop. Clinton N/A
406-826 Blackfoot Tel. Coop. Plains N/A
406-827 Blackfoot Tel. Coop. Thompson Falls N/A
406-828 Range Tel Coop Inc Alzada N/A
406-829 Qwest Corporation Missoula N/A
406-830 Charter IP Enabled Services Missoula 2/6/2007
406-831 Telnyx Billings 12/21/2016
406-832 Southern Montana Tel. Co. Wise River N/A
406-833 Cellco Partnership Ronan N/A
406-834 Southern Montana Tel. Co. Jackson N/A
406-835 3 Rivers Tel. Coop. Melrose N/A
406-836 Onvoy Great Falls N/A
406-837 Centurytel Of Montana Bigfork N/A
406-838 Qwest Corporation Cooke City N/A
406-839 Charter IP Enabled Services Billings 9/30/2006
406-840 Onvoy Silvertip 5/23/2007
406-841 Qwest Corporation Helena N/A
406-842 3 Rivers Tel. Coop. Sheridan N/A
406-843 3 Rivers Tel. Coop. Virginia City N/A
406-844 Centurytel Of Montana Lakeside N/A
406-845 Charter IP Enabled Services Cut Bank 10/27/2008
406-846 Qwest Corporation Deer Lodge N/A
406-847 Blackfoot Tel. Coop. Noxon N/A
406-848 Qwest Corporation Gardiner N/A
406-849 Centurytel Of Montana Elmo N/A
406-850 New Cingular Wireless PCS Billings N/A
406-851 New Cingular Wireless PCS Miles City N/A
406-852 Cellco Partnership Miles City N/A
406-853 Cellco Partnership Miles City N/A
406-854 Centurytel Of Montana Marion N/A
406-855 New Cingular Wireless PCS Billings N/A
406-856 Mid-Rivers Tel. Coop. Custer N/A
406-857 Centurytel Of Montana Somers N/A
406-858 Dish Wireless Kalispell N/A
406-859 Blackfoot Tel. Coop. Philipsburg N/A
406-860 New Cingular Wireless PCS Billings N/A
406-861 New Cingular Wireless PCS Billings N/A
406-862 Centurytel Of Montana Whitefish N/A
406-863 Centurytel Of Montana Whitefish N/A
406-864 Blackfoot Tel. Coop. South Alberton N/A
406-865 Cellco Partnership Dillon N/A
406-866 Qwest Corporation Great Falls N/A
406-867 Electric Lightwave Billings N/A
406-868 Cellco Partnership Great Falls N/A
406-869 Electric Lightwave Billings N/A
406-870 Bandwidth.com Clec Great Falls N/A
406-871 Cellco Partnership Kalispell 6/15/2006
406-872 Western Montana Communitytel Polson 10/15/2007
406-873 Qwest Corporation Cut Bank N/A
406-874 Mid-Rivers Telephone Cooperative Miles City N/A
406-875 Project Tel. Co. Pompeys Pillar N/A
406-876 Cellco Partnership Billings N/A
406-877 Reservation Tel. Coop. West Beach N/A
406-878 Nuso Great Falls 3/1/2013
406-879 New Cingular Wireless PCS Havre 11/11/2009
406-880 Cellco Partnership Missoula N/A
406-881 Centurytel Of Montana Olney N/A
406-882 Interbel Tel. Coop. Eureka Rural N/A
406-883 Centurytel Of Montana Polson N/A
406-884 Centurytel Of Montana Polson N/A
406-885 Cellco Partnership Kalispell N/A
406-886 Centurytel Of Montana Swan Lake N/A
406-887 Centurytel Of Montana Finley Point N/A
406-888 Qwest Corporation West Glacier N/A
406-889 Interbel Tel. Coop. Eureka Rural N/A
406-890 Charter IP Enabled Services Kalispell N/A
406-891 New Cingular Wireless PCS Baker N/A
406-892 Centurytel Of Montana Columbia Falls N/A
406-893 Nemont Tel Coop Inc Peerless N/A
406-894 Commio Billings N/A
406-895 Nemont Tel Coop Inc Outlook N/A
406-896 Qwest Corporation Billings N/A
406-897 Charter IP Enabled Services Columbia Falls N/A
406-898 Charter IP Enabled Services Bozeman 3/20/2009
406-899 New Cingular Wireless PCS Great Falls N/A
406-900-XXXX --- 406-999-XXXX
NPANXX Carrier1 Area Served2 Date3
406-900 Level 3 Communications Ennis 9/29/2017
406-901 Onvoy Spectrum Billings 4/14/2021
406-902 Level 3 Communications Sheridan 11/27/2018
406-905 Onvoy Joliet 10/3/2011
406-909 Cellco Partnership Columbia Falls 5/24/2018
406-913 Cellco Partnership Roundup N/A
406-914 Cellco Partnership Lambert N/A
406-915 Cellco Partnership South Wolf Point N/A
406-916 T-Mobile USA Helena 3/24/2017
406-919 Terra Nova Telecom Belgrade 3/4/2019
406-920 Cellco Partnership Bozeman N/A
406-922 Electric Lightwave Bozeman N/A
406-923 Commio Great Falls 1/3/2005
406-924 Level 3 Communications Belgrade 10/26/2004
406-925 Cellco Partnership Dillon N/A
406-926 Charter IP Enabled Services Missoula 1/7/2011
406-927 New Cingular Wireless PCS Billings 7/23/2010
406-928 Cellco Partnership Grass Range N/A
406-929 Onvoy Hungry Horse 7/26/2007
406-930 Cellco Partnership Big Timber N/A
406-931 Cellco Partnership Big Timber N/A
406-932 Triangle Tel. Coop. Assn. Big Timber N/A
406-933 Qwest Corporation Helena N/A
406-934 Wide Voice Miles City N/A
406-935 Cellco Partnership Broadus N/A
406-936 Bandwidth.com Clec Clyde Park 7/15/2015
406-937 Northern Tel. Coop. Sunburst N/A
406-938 Cellco Partnership Alzada N/A
406-939 Cellco Partnership West Glendive N/A
406-940 New Cingular Wireless PCS Molt 7/18/2017
406-941 Cellco Partnership West Glendive N/A
406-942 Cellco Partnership Glasgow 10/23/2009
406-943 Level 3 Communications Sidney 1/9/2003
406-944 Level 3 Communications Miles City 1/9/2003
406-945 New Cingular Wireless PCS Havre N/A
406-946 Level 3 Communications Livingston 1/9/2003
406-947 Mid-Rivers Tel. Coop. Musselshell N/A
406-948 Level 3 Communications Glendive 1/9/2003
406-949 New Cingular Wireless PCS Townsend N/A
406-951 New Cingular Wireless PCS Miles City N/A
406-952 Onvoy Spectrum Great Falls N/A
406-953 Sagebrush Cellular Hardin N/A
406-954 Cellco Partnership Roy N/A
406-955 Cellco Partnership Kalispell 12/04/2023
406-956 New Cingular Wireless PCS Baker 10/20/2010
406-957 Cellco Partnership Terry N/A
406-960 Level 3 Communications Dillon 1/9/2003
406-961 Qwest Corporation Hamilton N/A
406-962 Qwest Corporation Joliet N/A
406-963 Nemont Tel Coop Inc Froid Rural N/A
406-964 Qwest Corporation Great Falls N/A
406-965 Airus Great Falls N/A
406-966 Level 3 Communications Shelby 1/9/2003
406-967 Project Tel. Co. Worden N/A
406-968 HD Carrier Lewistown 1/9/2003
406-969 Skye Telecom Billings N/A
406-970 Centurylink Communications Billings 6/3/2016
406-971 Cellco Partnership Plevna N/A
406-972 West River Cooperative Telephone Company West Camp Crook N/A
406-973 Cellco Partnership Sidney N/A
406-974 Cellco Partnership Circle N/A
406-975 Cellco Partnership Ekalaka N/A
406-977 Cellco Partnership Jordan N/A
406-978 Cellco Partnership Baker N/A
406-979 Cellco Partnership Richey N/A
406-980 Cellco Partnership Townsend N/A
406-981 Cellco Partnership South Miles City N/A
406-982 Centurytel Of Montana Yellow Bay N/A
406-983 Cellco Partnership Ashland N/A
406-984 Range Tel Coop Inc Birney N/A
406-987 Cellco Partnership Glendive N/A
406-988 Level 3 Communications Dillon 1/7/2005
406-989 New Cingular Wireless PCS West Glendive N/A
406-990 New Cingular Wireless PCS Lame Deer 5/12/2020
406-991 Onvoy Marion 10/11/2007
406-992 Onvoy Helena 8/26/2008
406-993 3 Rivers Tel. Coop. Big Sky N/A
406-994 Qwest Corporation Bozeman N/A
406-995 3 Rivers Tel. Coop. Big Sky N/A
406-996 Charter IP Enabled Services Helena 1/10/2011
406-997 AT&T Fromberg 01/24/2024
406-998 Airus Billings 8/26/2015
406-999 Montana Opticom Big Sky 7/11/2006
  1. NPA-NXX assigned carrier; with Number Pooling thousand block numbers are often assigned to other carriers as well; moreover, phone numbers can be ported between service providers
  2. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  3. Assignment date. N/A - mostly central office codes assigned before 2001.
  4. NXX prefixes last updated: November 22, 2025

Cities in area code 406

City1 County Time Zone1
Absarokee Stillwater M
Acton Yellowstone M
Alberton Mineral M
Alder Madison M
Alzada Carter M
Anaconda Deer Lodge M
Angela Rosebud M
Antelope Sheridan M
Arlee Lake M
Ashland Rosebud M
Augusta Lewis And Clark M
Avon Powell M
Babb Glacier M
Bainville Roosevelt M
Baker Fallon M
Ballantine Yellowstone M
Basin Jefferson M
Bearcreek Carbon M
Belfry Carbon M
Belgrade Gallatin M
Belt Cascade M
Biddle Powder River M
Big Arm Lake M
Big Sandy Chouteau M
Big Sky Gallatin M
Big Timber Sweet Grass M
Bigfork Flathead M
Bighorn Treasure M
Billings Yellowstone M
Birney Rosebud M
Black Eagle Cascade M
Bloomfield Dawson M
Bonner Missoula M
Boulder Jefferson M
Box Elder Hill M
Boyd Carbon M
Boyes Carter M
Bozeman Gallatin M
Brady Pondera M
Bridger Carbon M
Broadus Powder River M
Broadview Yellowstone M
Brockton Roosevelt M
Brockway McCone M
Browning Glacier M
Brusett Garfield M
Buffalo Fergus M
Busby Big Horn M
Butte Silver Bow M
Bynum Teton M
Cameron Madison M
Canyon Creek Lewis And Clark M
Capitol Carter M
Cardwell Jefferson M
Carter Chouteau M
Cascade Cascade M
Charlo Lake M
Chester Liberty M
Chinook Blaine M
Choteau Teton M
Circle McCone M
Clancy Jefferson M
Clinton Missoula M
Clyde Park Park M
Coffee Creek Fergus M
Cohagen Garfield M
Colstrip Rosebud M
Columbia Falls Flathead M
Columbus Stillwater M
Condon Missoula M
Conner Ravalli M
Conrad Pondera M
Cooke City Park M
Coram Flathead M
Corvallis Ravalli M
Crane Richland M
Crow Agency Big Horn M
Culbertson Roosevelt M
Custer Yellowstone M
Cut Bank Glacier M
Dagmar Sheridan M
Darby Ravalli M
Dayton Lake M
De Borgia Mineral M
Decker Big Horn M
Deer Lodge Powell M
Dell Beaverhead M
Denton Fergus M
Dillon Beaverhead M
Divide Silver Bow M
Dixon Sanders M
Dodson Phillips M
Drummond Granite M
Dupuyer Pondera M
Dutton Teton M
East Glacier Park Glacier M
East Helena Lewis And Clark M
Edgar Carbon M
Ekalaka Carter M
Elliston Powell M
Elmo Lake M
Emigrant Park M
Ennis Madison M
Essex Flathead M
Ethridge Toole M
Eureka Lincoln M
Fairfield Teton M
Fairview Richland M
Fallon Prairie M
Fishtail Stillwater M
Flaxville Daniels M
Florence Ravalli M
Floweree Chouteau M
Forestgrove Fergus M
Forsyth Rosebud M
Fort Benton Chouteau M
Fort Harrison Lewis And Clark M
Fort Peck Valley M
Fort Shaw Cascade M
Fortine Lincoln M
Frazer Valley M
Frenchtown Missoula M
Froid Roosevelt M
Fromberg Carbon M
Galata Toole M
Gallatin Gateway Gallatin M
Gardiner Park M
Garrison Powell M
Garryowen Big Horn M
Geraldine Chouteau M
Geyser Judith Basin M
Gildford Hill M
Glasgow Valley M
Glen Beaverhead M
Glendive Dawson M
Glentana Valley M
Gold Creek Powell M
Grantsdale Ravalli M
Grass Range Fergus M
Great Falls Cascade M
Greycliff Sweet Grass M
Hall Granite M
Hamilton Ravalli M
Hammond Carter M
Hardin Big Horn M
Harlem Blaine M
Harlowton Wheatland M
Harrison Madison M
Hathaway Rosebud M
Haugan Mineral M
Havre Hill M
Hays Blaine M
Heart Butte Pondera M
Helena Lewis And Clark M
Helmville Powell M
Heron Sanders M
Highwood Chouteau M
Hilger Fergus M
Hingham Hill M
Hinsdale Valley M
Hobson Judith Basin M
Hogeland Blaine M
Homestead Sheridan M
Hot Springs Sanders M
Hungry Horse Flathead M
Huntley Yellowstone M
Huson Missoula M
Hysham Treasure M
Ingomar Rosebud M
Inverness Hill M
Ismay Custer M
Jackson Beaverhead M
Jefferson City Jefferson M
Joliet Carbon M
Joplin Liberty M
Jordan Garfield M
Judith Gap Wheatland M
Kalispell Flathead M
Kevin Toole M
Kila Flathead M
Kinsey Custer M
Kremlin Hill M
Lake Mc Donald Flathead M
Lakeside Flathead M
Lambert Richland M
Lame Deer Rosebud M
Larslan Valley M
Laurel Yellowstone M
Lavina Golden Valley M
Ledger Pondera M
Lewistown Fergus M
Libby Lincoln M
Lima Beaverhead M
Lincoln Lewis And Clark M
Lindsay Dawson M
Livingston Park M
Lloyd Blaine M
Lodge Grass Big Horn M
Lolo Missoula M
Loma Chouteau M
Lonepine Sanders M
Loring Phillips M
Lothair Liberty M
Malmstrom Afb Cascade M
Malta Phillips M
Manhattan Gallatin M
Marion Flathead M
Martin City Flathead M
Martinsdale Meagher M
Marysville Lewis And Clark M
Mc Allister Madison M
Mc Leod Sweet Grass M
Medicine Lake Sheridan M
Melrose Silver Bow M
Melstone Musselshell M
Melville Sweet Grass M
Mildred Prairie M
Miles City Custer M
Milltown Missoula M
Missoula Missoula M
Moccasin Judith Basin M
Molt Yellowstone M
Monarch Cascade M
Moore Fergus M
Mosby Garfield M
Musselshell Musselshell M
Nashua Valley M
Neihart Cascade M
Norris Madison M
Noxon Sanders M
Nye Stillwater M
Oilmont Toole M
Olive Powder River M
Olney Flathead M
Opheim Valley M
Otter Powder River M
Outlook Sheridan M
Ovando Powell M
Pablo Lake M
Paradise Sanders M
Park City Stillwater M
Peerless Daniels M
Pendroy Teton M
Philipsburg Granite M
Pinesdale Ravalli M
Plains Sanders M
Plentywood Sheridan M
Plevna Fallon M
Polaris Beaverhead M
Polebridge Flathead M
Polson Lake M
Pompeys Pillar Yellowstone M
Pony Madison M
Poplar Roosevelt M
Powderville Powder River M
Power Teton M
Pray Park M
Proctor Lake M
Pryor Big Horn M
Radersburg Broadwater M
Ramsay Silver Bow M
Rapelje Stillwater M
Ravalli Lake M
Raymond Sheridan M
Raynesford Judith Basin M
Red Lodge Carbon M
Redstone Sheridan M
Reed Point Stillwater M
Reserve Sheridan M
Rexford Lincoln M
Richey Dawson M
Richland Valley M
Ringling Meagher M
Roberts Carbon M
Rollins Lake M
Ronan Lake M
Roscoe Carbon M
Rosebud Rosebud M
Roundup Musselshell M
Roy Fergus M
Rudyard Hill M
Ryegate Golden Valley M
Saco Phillips M
Saltese Mineral M
Sand Coulee Cascade M
Sand Springs Garfield M
Sanders Treasure M
Savage Richland M
Scobey Daniels M
Seeley Lake Missoula M
Shawmut Wheatland M
Shelby Toole M
Shepherd Yellowstone M
Sheridan Madison M
Sidney Richland M
Silver Gate Park M
Silver Star Madison M
Simms Cascade M
Somers Flathead M
Springdale Park M
St Ignatius Lake M
St Marie Valley M
St Regis Mineral M
St Xavier Big Horn M
Stanford Judith Basin M
Stevensville Ravalli M
Stockett Cascade M
Stryker Lincoln M
Sula Ravalli M
Sumatra Rosebud M
Sun River Cascade M
Sunburst Toole M
Superior Mineral M
Sweet Grass Toole M
Teigen Petroleum M
Terry Prairie M
Thompson Falls Sanders M
Three Forks Gallatin M
Toston Broadwater M
Townsend Broadwater M
Trego Lincoln M
Trout Creek Sanders M
Troy Lincoln M
Turner Blaine M
Twin Bridges Madison M
Two Dot Wheatland M
Ulm Cascade M
Valier Pondera M
Vandalia Valley M
Vaughn Cascade M
Victor Ravalli M
Vida McCone M
Virginia City Madison M
Volborg Custer M
Warm Springs Deer Lodge M
West Glacier Flathead M
West Yellowstone Gallatin M
Westby Sheridan M
White Sulphur Springs Meagher M
Whitefish Flathead M
Whitehall Jefferson M
Whitetail Daniels M
Whitewater Phillips M
Whitlash Liberty M
Wibaux Wibaux M
Willard Fallon M
Willow Creek Gallatin M
Wilsall Park M
Winifred Fergus M
Winnett Petroleum M
Winston Broadwater M
Wisdom Beaverhead M
Wise River Beaverhead M
Wolf Creek Lewis And Clark M
Wolf Point Roosevelt M
Worden Yellowstone M
Wyola Big Horn M
Yellowtail Big Horn M
Zortman Phillips M
Zurich Blaine M
  1. Listed above are most places served by USA area code 406. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. M stands for Mountain Time (currently ).
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