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

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Area Code 406

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 Area served[1] Provider[2] Date[3]
406-200 Billings Multiple 4/17/2012
406-201 Forsyth Multiple 1/21/2003
406-202 Helena Multiple 4/18/2001
406-203 Missoula Multiple N/A
406-204 Helena Multiple N/A
406-205 Great Falls Multiple N/A
406-206 Billings Level 3 Communications N/A
406-207 Missoula New Cingular Wireless PCS 4/18/2001
406-208 Billings New Cingular Wireless PCS 4/18/2001
406-209 Bozeman Multiple 4/18/2001
406-210 Seeley Lake Cellco Partnership N/A
406-212 Kalispell New Cingular Wireless PCS 4/18/2001
406-213 Colstrip Multiple 5/6/2003
406-214 Missoula Multiple N/A
406-215 Missoula Multiple N/A
406-216 Great Falls Multiple N/A
406-217 Great Falls Cellco Partnership N/A
406-218 Missoula Multiple 8/3/2004
406-219 Bozeman Multiple 2/13/2003
406-220 Livingston Multiple N/A
406-221 Butte Multiple 2/13/2003
406-222 Livingston Qwest Corporation N/A
406-223 Livingston Cellco Partnership N/A
406-224 Livingston Multiple N/A
406-225 Boulder Multiple N/A
406-226 East Glacier Park Multiple N/A
406-227 Helena Qwest Corporation N/A
406-228 Glasgow Multiple N/A
406-229 Cut Bank Multiple 1/20/2003
406-230 Glasgow Cellco Partnership N/A
406-231 Great Falls New Cingular Wireless PCS 7/12/2001
406-232 Miles City Qwest Corporation N/A
406-233 Miles City Multiple N/A
406-234 Miles City Mid-Rivers Telephone Cooperative N/A
406-235 Wolf Creek Multiple N/A
406-236 Neihart 3 Rivers Tel. Coop. N/A
406-237 Billings Qwest Corporation N/A
406-238 Billings Qwest Corporation N/A
406-239 Missoula New Cingular Wireless PCS N/A
406-240 Missoula New Cingular Wireless PCS N/A
406-241 Missoula Multiple N/A
406-242 Thompson Falls Multiple 3/18/2003
406-243 Missoula Qwest Corporation N/A
406-244 Potomac Blackfoot Tel. Coop. N/A
406-245 Billings Qwest Corporation N/A
406-246 Dixon Blackfoot Tel. Coop. N/A
406-247 Billings Multiple N/A
406-248 Billings Qwest Corporation N/A
406-249 Kalispell Cellco Partnership N/A
406-250 Kalispell Cellco Partnership N/A
406-251 Missoula Qwest Corporation N/A
406-252 Billings Qwest Corporation N/A
406-253 Kalispell New Cingular Wireless PCS N/A
406-254 Billings Qwest Corporation N/A
406-255 Billings Qwest Corporation N/A
406-256 Billings Qwest Corporation N/A
406-257 Kalispell Centurytel Of Montana N/A
406-258 Missoula Multiple N/A
406-259 Billings Qwest Corporation N/A
406-260 Kalispell Multiple N/A
406-261 Kalispell New Cingular Wireless PCS N/A
406-262 Havre Multiple N/A
406-263 Glasgow Sagebrush Cellular N/A
406-264 Fort Shaw 3 Rivers Tel. Coop. N/A
406-265 Havre Qwest Corporation N/A
406-266 Townsend Multiple N/A
406-267 Divide Southern Montana Tel. Co. N/A
406-268 Great Falls Multiple N/A
406-269 St Regis New Cingular Wireless PCS 10/12/2010
406-270 Kalispell Cellco Partnership N/A
406-271 Conrad Multiple N/A
406-272 Billings Multiple N/A
406-273 Missoula Multiple N/A
406-274 Missoula Multiple N/A
406-275 Pablo Ronan Tel. Co. N/A
406-276 Lima 3 Rivers Tel. Coop. N/A
406-277 Belt 3 Rivers Tel. Coop. N/A
406-278 Conrad Multiple N/A
406-279 Valier 3 Rivers Tel. Coop. N/A
406-280 St Regis New Cingular Wireless PCS 3/18/2003
406-281 Billings Multiple N/A
406-282 Manhattan Multiple N/A
406-283 Libby Multiple N/A
406-284 Manhattan Multiple N/A
406-285 Three Forks Multiple N/A
406-286 Reserve Multiple N/A
406-287 Whitehall Multiple N/A
406-288 Drummond Blackfoot Tel. Coop. N/A
406-289 Conrad Multiple N/A
406-290 Columbus Multiple 3/14/2007
406-291 Libby Cellco Partnership N/A
406-292 Joplin Multiple N/A
406-293 Libby Multiple N/A
406-294 Billings Electric Lightwave N/A
406-295 Troy Multiple N/A
406-296 Eureka Multiple N/A
406-297 Eureka Rural Interbel Telephone Cooperative N/A
406-298 Columbus Multiple N/A
406-299 Butte Multiple 1/23/2003
406-300-XXXX --- 406-399-XXXX
NPANXX Area served[1] Provider[2] Date[3]
406-300 Kalispell Multiple 7/17/2013
406-301 Malta Multiple 5/6/2008
406-302 Wolf Creek Multiple 10/3/2011
406-303 Missoula Multiple 4/17/2012
406-304 Missoula Multiple 3/25/2016
406-305 White Sulphur Springs Multiple 10/20/2010
406-306 Manhattan Multiple 10/20/2017
406-307 Canyon Creek Charter IP Enabled Services 03/18/2025
406-308 Cascade Multiple 9/5/2017
406-309 Kalispell Multiple 7/1/2011
406-310 Butte Multiple N/A
406-312 Bozeman Multiple N/A
406-313 Boulder Multiple 11/16/2012
406-314 Kalispell Multiple 10/21/2004
406-315 Great Falls Multiple N/A
406-316 Boulder Multiple 7/12/2019
406-317 Missoula Multiple N/A
406-318 Billings Multiple 2/17/2011
406-319 Polson Multiple N/A
406-320 Roundup Multiple N/A
406-321 Columbus Multiple N/A
406-322 Columbus Multiple N/A
406-323 Roundup Mid-Rivers Tel. Coop. N/A
406-324 Helena Multiple N/A
406-325 Billings Multiple N/A
406-326 Reed Point Triangle Tel. Coop. Assn. N/A
406-327 Missoula Qwest Corporation N/A
406-328 Absarokee Multiple N/A
406-329 Missoula Qwest Corporation N/A
406-330 Clinton Multiple N/A
406-331 Roundup Multiple N/A
406-332 Pablo Multiple N/A
406-333 Livingston Multiple N/A
406-334 Libby Multiple 5/10/2004
406-335 Sweet Grass Northern Tel. Coop. N/A
406-336 North Cut Bank Northern Tel. Coop. N/A
406-337 Kevin-Oilmont Northern Tel. Coop. N/A
406-338 Browning Multiple N/A
406-339 Ethridge Northern Tel. Coop. N/A
406-340 Lima New Cingular Wireless PCS N/A
406-341 Manhattan Multiple 7/6/2020
406-342 Hysham Range Tel Coop Inc N/A
406-343 Wyola Multiple N/A
406-344 Havre Multiple 7/28/2016
406-345 Glendive Multiple N/A
406-346 Forsyth Multiple 7/11/2002
406-347 Rosebud Range Tel Coop Inc N/A
406-348 Huntley Multiple N/A
406-349 Alta Blackfoot Tel. Coop. N/A
406-350 Lewistown Multiple N/A
406-351 Forsyth Multiple N/A
406-352 Box Elder Triangle Tel. Coop. Assn. N/A
406-353 Harlem Multiple N/A
406-354 Rock Springs Mid-Rivers Tel. Coop. N/A
406-355 Rudyard Triangle Tel. Coop. Assn. N/A
406-356 Forsyth Multiple N/A
406-357 Chinook Multiple N/A
406-358 Melstone Mid-Rivers Tel. Coop. N/A
406-359 Glendive Multiple N/A
406-360 Hamilton Cellco Partnership N/A
406-361 Hamilton Multiple 6/9/2011
406-362 Lincoln Lincoln Tel. Co. N/A
406-363 Hamilton Multiple N/A
406-364 Hinsdale Nemont Tel Coop Inc N/A
406-365 Glendive Multiple N/A
406-366 Lewistown Cellco Partnership N/A
406-367 North Glasgow Nemont Tel Coop Inc N/A
406-368 Canyon Creek Lincoln Tel. Co. N/A
406-369 Hamilton Multiple N/A
406-370 Missoula Cellco Partnership N/A
406-371 Billings Multiple 7/27/2004
406-372 Kremlin Triangle Tel. Coop. Assn. N/A
406-373 Billings Multiple N/A
406-374 Moore Triangle Tel. Coop. Assn. N/A
406-375 Hamilton Multiple N/A
406-376 Gildford Triangle Tel. Coop. Assn. N/A
406-377 Glendive Mid-Rivers Telephone Cooperative N/A
406-378 Big Sandy Multiple N/A
406-379 Turner Triangle Tel. Coop. Assn. N/A
406-380 Lewistown Multiple N/A
406-381 Hamilton Cellco Partnership N/A
406-382 Superior Multiple 3/18/2003
406-383 Dodson Triangle Tel. Coop. Assn. N/A
406-384 Billings Multiple N/A
406-385 Westby Multiple N/A
406-386 Hopp-Illiad Triangle Tel. Coop. Assn. N/A
406-387 Hungry Horse Multiple N/A
406-388 Belgrade Qwest Corporation N/A
406-389 Helena Multiple 9/18/2013
406-390 South Havre Cellco Partnership N/A
406-391 Cut Bank Multiple N/A
406-392 North Wolf Point Multiple N/A
406-393 Somers Multiple 3/30/2006
406-394 North Havre Multiple N/A
406-395 South Havre Triangle Tel. Coop. Assn. N/A
406-396 Missoula Cellco Partnership 11/26/2003
406-397 Hingham Triangle Tel. Coop. Assn. N/A
406-398 North Havre Triangle Tel. Coop. Assn. N/A
406-399 South Havre Multiple N/A
406-400-XXXX --- 406-499-XXXX
NPANXX Area served[1] Provider[2] Date[3]
406-400 Havre Multiple 4/27/2017
406-401 Great Falls Multiple 5/29/2019
406-402 Great Falls Multiple 8/4/2017
406-403 Great Falls Multiple 3/8/2006
406-404 Bozeman Multiple 4/3/2012
406-405 Libby Multiple 9/8/2022
406-406 Missoula Livewire Telecom 12/09/2024
406-407 Kalispell Multiple 8/16/2010
406-408 Hays Cellco Partnership 10/15/2019
406-409 Billings Multiple 5/29/2019
406-410 Helena Multiple N/A
406-412 Billings Onvoy 5/22/2017
406-413 Billings Multiple 5/12/2015
406-414 Bozeman Multiple 12/7/2011
406-415 Deer Lodge Multiple 4/9/2010
406-416 Forsyth Multiple 6/17/2020
406-417 Helena Multiple 5/28/2008
406-418 Cooke City Multiple 8/20/2019
406-419 Victor Multiple 7/12/2019
406-420 Bigfork Multiple 2/28/2006
406-421 South Miles City Multiple N/A
406-422 Helena Multiple N/A
406-423 Hobson Triangle Tel. Coop. Assn. N/A
406-424 Shelby Multiple 11/12/2001
406-425 Red Lodge Multiple N/A
406-426 Red Lodge Multiple N/A
406-427 South Broadus Range Tel Coop Inc N/A
406-428 Grass Range Multiple N/A
406-429 Winnett Mid-Rivers Tel. Coop. N/A
406-430 Helena Onvoy N/A
406-431 Helena Cellco Partnership N/A
406-432 Devon Northern Tel. Coop. N/A
406-433 Sidney Mid-Rivers Telephone Cooperative N/A
406-434 Shelby Multiple N/A
406-435 Billings Multiple N/A
406-436 Broadus Range Tel Coop Inc N/A
406-437 Helena Multiple 7/27/2004
406-438 Helena Multiple 2/6/2014
406-439 Helena New Cingular Wireless PCS N/A
406-440 Helena Multiple 7/1/2005
406-441 Helena Qwest Corporation N/A
406-442 Helena Qwest Corporation N/A
406-443 Helena Qwest Corporation N/A
406-444 Helena Qwest Corporation N/A
406-445 Red Lodge Multiple N/A
406-446 Red Lodge Multiple N/A
406-447 Helena Qwest Corporation N/A
406-448 North Poplar Multiple N/A
406-449 Helena Qwest Corporation N/A
406-450 Shelby Cellco Partnership N/A
406-451 Bozeman Multiple 8/4/2004
406-452 Great Falls Qwest Corporation N/A
406-453 Great Falls Qwest Corporation N/A
406-454 Great Falls Qwest Corporation N/A
406-455 Great Falls Multiple N/A
406-456 South Chester Triangle Tel. Coop. Assn. N/A
406-457 Helena Qwest Corporation N/A
406-458 Helena Qwest Corporation N/A
406-459 Helena Cellco Partnership N/A
406-460 Shelby New Cingular Wireless PCS N/A
406-461 Helena Cellco Partnership N/A
406-462 Winifred Triangle Tel. Coop. Assn. N/A
406-463 Power 3 Rivers Tel. Coop. N/A
406-464 Roy Multiple N/A
406-465 Helena Cellco Partnership N/A
406-466 Choteau Multiple N/A
406-467 Fairfield 3 Rivers Tel. Coop. N/A
406-468 Cascade Multiple N/A
406-469 Pendroy 3 Rivers Tel. Coop. N/A
406-470 Shelby Multiple N/A
406-471 Kalispell Cellco Partnership 6/1/2005
406-472 Dupuyer 3 Rivers Tel. Coop. N/A
406-473 Judith Gap Triangle Tel. Coop. Assn. N/A
406-474 Flaxville Nemont Tel Coop Inc N/A
406-475 Helena Multiple N/A
406-476 Dutton Multiple N/A
406-477 Lame Deer Multiple N/A
406-478 Sidney Multiple N/A
406-479 Butte Multiple 10/3/2013
406-480 Sidney Multiple N/A
406-481 Missoula Multiple 06/21/2023
406-482 Sidney Multiple N/A
406-483 Dagmar Nemont Tel Coop Inc N/A
406-484 Crooked Creek Multiple N/A
406-485 Circle Multiple N/A
406-486 Fallon Mid-Rivers Tel. Coop. N/A
406-487 Scobey Nemont Tel Coop Inc N/A
406-488 Sidney Mid-Rivers Telephone Cooperative N/A
406-489 Sidney Multiple N/A
406-490 Butte Cellco Partnership N/A
406-491 Butte New Cingular Wireless PCS N/A
406-492 Avon Blackfoot Tel. Coop. N/A
406-493 Missoula Multiple N/A
406-494 Butte Qwest Corporation N/A
406-495 Helena Qwest Corporation N/A
406-496 Butte Multiple N/A
406-497 Butte Multiple N/A
406-498 Butte Cellco Partnership N/A
406-499 Seeley Lake Multiple 3/18/2003
406-500-XXXX --- 406-599-XXXX
NPANXX Area served[1] Provider[2] Date[3]
406-500 Billings Multiple 1/29/2019
406-501 Whitehall Multiple 8/20/2019
406-502 Helena Multiple 4/3/2012
406-503 Billings Multiple 04/05/2023
406-504 Fairfield Level 3 Communications 2/12/2021
406-505 Conrad Multiple 10/14/2010
406-506 Billings Multiple 6/1/2020
406-507 Whitefish Multiple 02/17/2023
406-508 Frenchtown Multiple 2/3/2012
406-510 Missoula Onvoy 3/22/2017
406-512 Boulder Multiple 02/22/2023
406-513 Helena Multiple 4/8/2008
406-514 Culbertson New Cingular Wireless PCS 10/20/2010
406-515 Superior Multiple 10/12/2010
406-516 Laurel Multiple 04/27/2023
406-517 Livingston Multiple 06/07/2024
406-518 Gallatin Gateway Multiple 9/27/2011
406-519 Missoula Multiple N/A
406-520 Absarokee Multiple N/A
406-521 Townsend Multiple N/A
406-522 Bozeman Qwest Corporation N/A
406-523 Missoula Qwest Corporation N/A
406-524 Valley Industrial Park Multiple N/A
406-525 South Wolf Point Multiple N/A
406-526 Fort Peck Multiple N/A
406-527 Saco Multiple N/A
406-528 Ronan Ronan Tel. Co. N/A
406-529 Missoula Cellco Partnership 9/16/2005
406-530 Laurel Multiple N/A
406-531 Missoula Cellco Partnership N/A
406-532 Missoula Blackfoot Communications N/A
406-533 Butte Multiple N/A
406-534 Billings Multiple N/A
406-535 Lewistown Mid-Rivers Telephone Cooperative N/A
406-536 Bozeman Multiple 12/18/2024
406-537 Melville Triangle Tel. Coop. Assn. N/A
406-538 Lewistown Qwest Corporation N/A
406-539 Bozeman New Cingular Wireless PCS N/A
406-540 Missoula Multiple N/A
406-541 Missoula Blackfoot Communications N/A
406-542 Missoula Qwest Corporation N/A
406-543 Missoula Qwest Corporation N/A
406-544 Missoula Cellco Partnership N/A
406-545 Billings Multiple 6/19/2002
406-546 Missoula Cellco Partnership N/A
406-547 White Sulphur Springs Multiple N/A
406-548 Bozeman Multiple N/A
406-549 Missoula Qwest Corporation N/A
406-550 Missoula Multiple N/A
406-551 Bozeman Multiple 6/19/2002
406-552 Missoula Multiple 6/19/2002
406-553 Divide New Cingular Wireless PCS N/A
406-554 North Broadus Range Tel Coop Inc N/A
406-556 Bozeman Qwest Corporation N/A
406-557 Jordan Multiple N/A
406-558 Helena Multiple 6/19/2002
406-559 Anaconda Multiple N/A
406-560 Anaconda Cellco Partnership N/A
406-561 Billings Multiple 8/2/2017
406-562 Augusta 3 Rivers Tel. Coop. N/A
406-563 Anaconda Multiple N/A
406-564 Great Falls Multiple 6/19/2002
406-565 Butte Multiple 6/19/2002
406-566 Stanford Triangle Tel. Coop. Assn. N/A
406-567 Denton Triangle Tel. Coop. Assn. N/A
406-568 Ryegate Mid-Rivers Tel. Coop. N/A
406-569 West Squaw Gap Reservation Tel. Coop. N/A
406-570 Bozeman Cellco Partnership N/A
406-571 Finley Point Multiple N/A
406-572 Martinsdale Triangle Tel. Coop. Assn. N/A
406-573 Browning Multiple N/A
406-574 Silvertip Multiple N/A
406-575 North Ryegate Mid-Rivers Tel. Coop. N/A
406-576 Conrad Multiple N/A
406-577 Bozeman Multiple N/A
406-578 Wilsall Multiple N/A
406-579 Bozeman Cellco Partnership N/A
406-580 Bozeman New Cingular Wireless PCS N/A
406-581 Bozeman Cellco Partnership N/A
406-582 Bozeman Qwest Corporation N/A
406-583 Bloomfield Mid-Rivers Tel. Coop. N/A
406-584 Lindsay Mid-Rivers Tel. Coop. N/A
406-585 Bozeman Qwest Corporation N/A
406-586 Bozeman Qwest Corporation N/A
406-587 Bozeman Qwest Corporation N/A
406-588 Carlyle Mid-Rivers Tel. Coop. N/A
406-589 Bozeman Multiple N/A
406-590 Great Falls Cellco Partnership N/A
406-591 Billings Cellco Partnership N/A
406-592 Busby Range Tel Coop Inc N/A
406-593 Butte Multiple N/A
406-594 Helena Cellco Partnership N/A
406-595 Bozeman Cellco Partnership N/A
406-596 Dillon New Cingular Wireless PCS N/A
406-597 Shelby New Cingular Wireless PCS N/A
406-598 Billings Cellco Partnership N/A
406-599 Bozeman Cellco Partnership 10/26/2004
406-600-XXXX --- 406-699-XXXX
NPANXX Area served[1] Provider[2] Date[3]
406-600 Bozeman Cellco Partnership 4/13/2006
406-601 Billings Multiple 11/8/2013
406-602 Bozeman Multiple 11/8/2013
406-603 Helena Multiple 11/8/2013
406-604 Great Falls Multiple 7/15/2011
406-605 Butte Multiple 4/18/2021
406-606 Billings Multiple 12/7/2012
406-607 Kalispell Multiple 11/8/2013
406-608 Billings Multiple 5/6/2021
406-609 Kalispell Multiple 3/24/2021
406-610 Missoula Multiple 01/06/2025
406-612 Swan Lake Multiple 10/11/2007
406-613 Bozeman Multiple 6/16/2022
406-614 Bigfork Multiple 10/13/2020
406-615 Thompson Falls Western Montana Communitytel 4/28/2014
406-616 Three Forks Multiple 7/1/2011
406-617 Billings Multiple 12/23/2024
406-618 Missoula Multiple 10/09/2025
406-620 Billings Sagebrush Cellular 12/6/2005
406-621 Fort Benton Multiple N/A
406-622 Fort Benton Multiple N/A
406-623 Hardin Multiple 2/16/2005
406-624 Bozeman Multiple 2/3/2005
406-625 Stevensville Multiple N/A
406-626 Frenchtown Multiple N/A
406-627 East Conrad 3 Rivers Tel. Coop. N/A
406-628 Laurel Multiple N/A
406-629 Hardin Multiple N/A
406-630 Sidney Multiple 2/16/2005
406-631 Elmo Multiple 7/26/2007
406-632 Harlowton Multiple N/A
406-633 Laurel Multiple N/A
406-634 Helena Multiple N/A
406-635 Terry Multiple N/A
406-636 Lavina Mid-Rivers Tel. Coop. N/A
406-637 Terry Multiple N/A
406-638 Hardin Multiple N/A
406-639 Lodgegrass Project Tel. Co. N/A
406-640 West Yellowstone Multiple N/A
406-641 West Yellowstone Multiple N/A
406-642 Victor Multiple N/A
406-643 North Parkman Multiple 5/24/2007
406-644 Charlo Multiple N/A
406-645 Deer Lodge Multiple N/A
406-646 West Yellowstone Multiple N/A
406-647 Billings Multiple 7/3/2008
406-648 North Hinsdale Multiple N/A
406-649 St Regis Multiple N/A
406-650 Wolf Point Sagebrush Cellular N/A
406-651 Billings Multiple N/A
406-652 Billings Qwest Corporation N/A
406-653 Wolf Point Nemont Tel Coop Inc N/A
406-654 Malta Multiple N/A
406-655 Billings Qwest Corporation N/A
406-656 Billings Qwest Corporation N/A
406-657 Billings Qwest Corporation N/A
406-658 South Malta Triangle Tel. Coop. Assn. N/A
406-659 North Parkman Multiple N/A
406-660 Dillon Multiple N/A
406-661 Billings Cellco Partnership N/A
406-662 Bridger Multiple N/A
406-663 Rapelje Triangle Tel. Coop. Assn. N/A
406-664 Belfry Project Tel. Co. N/A
406-665 Hardin Multiple N/A
406-666 Fort Smith Project Tel. Co. N/A
406-667 Broadview Triangle Tel. Coop. Assn. N/A
406-668 Fromberg Multiple N/A
406-669 Molt Triangle Tel. Coop. Assn. N/A
406-670 Billings Cellco Partnership N/A
406-671 Billings Cellco Partnership N/A
406-672 Billings Cellco Partnership N/A
406-673 Hays Triangle Tel. Coop. Assn. N/A
406-674 Whitewater Triangle Tel. Coop. Assn. N/A
406-675 Pablo Ronan Tel. Co. N/A
406-676 Ronan Ronan Tel. Co. N/A
406-677 Seeley Lake Multiple N/A
406-678 Haugan Blackfoot Tel. Coop. N/A
406-679 Hardin Multiple N/A
406-680 Malta Multiple 1/10/2005
406-681 Grant Southern Montana Tel. Co. N/A
406-682 Ennis 3 Rivers Tel. Coop. N/A
406-683 Dillon Qwest Corporation N/A
406-684 Twin Bridges 3 Rivers Tel. Coop. N/A
406-685 Harrison 3 Rivers Tel. Coop. N/A
406-686 Clyde Park Multiple N/A
406-687 W Glendive Multiple N/A
406-688 Scobey Multiple 2/10/2014
406-689 Wisdom Southern Montana Tel. Co. N/A
406-690 Billings Cellco Partnership N/A
406-691 Anaconda Multiple N/A
406-692 Yellow Bay Multiple 10/11/2007
406-693 Warm Springs Multiple N/A
406-694 Billings Multiple 1/5/2005
406-695 Frazer Multiple N/A
406-696 Billings Cellco Partnership 6/15/2006
406-697 Billings Cellco Partnership 4/21/2005
406-698 Billings Cellco Partnership N/A
406-699 Hardin Multiple N/A
406-702-XXXX --- 406-799-XXXX
NPANXX Area served[1] Provider[2] Date[3]
406-702 Billings Multiple 3/7/2012
406-703 Columbus Multiple 5/24/2021
406-707 Lewistown Multiple N/A
406-708 Lewistown Multiple 2/16/2005
406-709 Lakeside Multiple N/A
406-717 Billings Multiple 6/6/2018
406-718 Darby Multiple 4/12/2021
406-719 Fromberg Multiple 8/20/2019
406-720 Colstrip Multiple N/A
406-721 Missoula Qwest Corporation N/A
406-722 Alberton Multiple N/A
406-723 Butte Qwest Corporation N/A
406-724 Glentana Multiple N/A
406-725 Larslan Nemont Tel Coop Inc N/A
406-726 Arlee Multiple N/A
406-727 Great Falls Qwest Corporation N/A
406-728 Missoula Qwest Corporation N/A
406-729 Wilsall Multiple 9/8/2016
406-730 Whitefish Multiple N/A
406-731 Great Falls Multiple N/A
406-732 St Mary Multiple N/A
406-733 Highwood 3 Rivers Tel. Coop. N/A
406-734 Carter 3 Rivers Tel. Coop. N/A
406-735 Geyser 3 Rivers Tel. Coop. N/A
406-736 Stockett Multiple N/A
406-737 Geraldine Triangle Tel. Coop. Assn. N/A
406-738 Raynesford 3 Rivers Tel. Coop. N/A
406-739 Loma Triangle Tel. Coop. Assn. N/A
406-740 Colstrip Multiple N/A
406-741 Hot Springs Hot Springs Tel. Co. N/A
406-742 Fairview Multiple N/A
406-743 Laurel Multiple 9/8/2006
406-744 St Ignatius Multiple 11/16/2012
406-745 St Ignatius Blackfoot Tel. Coop. N/A
406-746 Nashua Nemont Tel Coop Inc N/A
406-747 Fairview Multiple N/A
406-748 Colstrip Multiple N/A
406-749 Colstrip Multiple N/A
406-750 Great Falls Cellco Partnership 8/22/2005
406-751 Kalispell Centurytel Of Montana N/A
406-752 Kalispell Centurytel Of Montana N/A
406-753 Brady 3 Rivers Tel. Coop. N/A
406-754 Condon Blackfoot Tel. Coop. N/A
406-755 Kalispell Centurytel Of Montana N/A
406-756 Kalispell Centurytel Of Montana N/A
406-757 Decker Range Tel Coop Inc N/A
406-758 Kalispell Centurytel Of Montana N/A
406-759 Chester Multiple N/A
406-760 Great Falls Multiple N/A
406-761 Great Falls Qwest Corporation N/A
406-762 Opheim Multiple N/A
406-763 Gallatin Gateway Multiple N/A
406-764 North Frannie Tri-County Tel. Assn. N/A
406-765 Plentywood Multiple N/A
406-766 Froid Nemont Tel Coop Inc N/A
406-767 Ridge Rt Communications N/A
406-768 Poplar Multiple N/A
406-769 Bainville Multiple N/A
406-770 Great Falls Multiple N/A
406-771 Great Falls Qwest Corporation N/A
406-772 Plevna Multiple N/A
406-773 Richey Multiple N/A
406-774 Lambert Multiple N/A
406-775 Ekalaka Multiple N/A
406-776 Savage Mid-Rivers Tel. Coop. N/A
406-777 Stevensville Multiple N/A
406-778 Baker Multiple N/A
406-779 Flaxville Rural Multiple N/A
406-780 Columbus Multiple N/A
406-781 Great Falls Cellco Partnership N/A
406-782 Butte Qwest Corporation N/A
406-783 Scobey Rural Multiple N/A
406-784 Ashland Range Tel Coop Inc N/A
406-785 North Nashua Multiple N/A
406-786 Brockton Multiple N/A
406-787 Culbertson Multiple N/A
406-788 Great Falls Cellco Partnership N/A
406-789 Medicine Lake Multiple N/A
406-790 Culbertson Multiple N/A
406-791 Great Falls Qwest Corporation N/A
406-792 Butte Multiple N/A
406-793 Ovando Blackfoot Tel. Coop. N/A
406-794 Billings Multiple 3/15/2006
406-795 Wibaux Multiple N/A
406-796 Wibaux Multiple N/A
406-797 Anaconda Multiple N/A
406-798 West Sidney Mid-Rivers Tel. Coop. N/A
406-799 Great Falls New Cingular Wireless PCS N/A
406-800-XXXX --- 406-899-XXXX
NPANXX Area served[1] Provider[2] Date[3]
406-800 Bridger Multiple 12/11/2013
406-802 Hamilton Multiple N/A
406-804 Gardiner Multiple 8/20/2019
406-807 East Glacier Park Multiple 4/22/2021
406-808 Havre Multiple N/A
406-812 Laurel Multiple 10/3/2011
406-813 Belgrade Multiple 9/14/2011
406-815 Red Lodge Multiple N/A
406-818 Red Lodge Multiple N/A
406-820 Olney Multiple 10/11/2007
406-821 Darby Multiple N/A
406-822 Superior Blackfoot Tel. Coop. N/A
406-823 Livingston Multiple N/A
406-824 St Ignatius New Cingular Wireless PCS N/A
406-825 Clinton Blackfoot Tel. Coop. N/A
406-826 Plains Multiple N/A
406-827 Thompson Falls Blackfoot Tel. Coop. N/A
406-828 Alzada Multiple N/A
406-829 Missoula Qwest Corporation N/A
406-830 Missoula Multiple 2/6/2007
406-831 Billings Multiple 12/21/2016
406-832 Wise River Southern Montana Tel. Co. N/A
406-833 Ronan Multiple N/A
406-834 Jackson Southern Montana Tel. Co. N/A
406-835 Melrose 3 Rivers Tel. Coop. N/A
406-836 Great Falls Multiple N/A
406-837 Bigfork Multiple N/A
406-838 Cooke City Multiple N/A
406-839 Billings Multiple 9/30/2006
406-840 Silvertip Multiple 5/23/2007
406-841 Helena Qwest Corporation N/A
406-842 Sheridan 3 Rivers Tel. Coop. N/A
406-843 Virginia City 3 Rivers Tel. Coop. N/A
406-844 Lakeside Multiple N/A
406-845 Cut Bank Multiple 10/27/2008
406-846 Deer Lodge Multiple N/A
406-847 Noxon Blackfoot Tel. Coop. N/A
406-848 Gardiner Multiple N/A
406-849 Elmo Multiple N/A
406-850 Billings Multiple N/A
406-851 Miles City Multiple N/A
406-852 Miles City Multiple N/A
406-853 Miles City Multiple N/A
406-854 Marion Multiple N/A
406-855 Billings New Cingular Wireless PCS N/A
406-856 Custer Mid-Rivers Tel. Coop. N/A
406-857 Somers Multiple N/A
406-858 Kalispell Multiple N/A
406-859 Philipsburg Blackfoot Tel. Coop. N/A
406-860 Billings New Cingular Wireless PCS N/A
406-861 Billings New Cingular Wireless PCS N/A
406-862 Whitefish Centurytel Of Montana N/A
406-863 Whitefish Multiple N/A
406-864 South Alberton Blackfoot Tel. Coop. N/A
406-865 Dillon Multiple N/A
406-866 Great Falls Multiple N/A
406-867 Billings Multiple N/A
406-868 Great Falls Cellco Partnership N/A
406-869 Billings Electric Lightwave N/A
406-870 Great Falls Multiple N/A
406-871 Kalispell Cellco Partnership 6/15/2006
406-872 Polson Multiple 10/15/2007
406-873 Cut Bank Multiple N/A
406-874 Miles City Mid-Rivers Telephone Cooperative N/A
406-875 Pompeys Pillar Project Tel. Co. N/A
406-876 Billings Multiple N/A
406-877 West Beach Reservation Tel. Coop. N/A
406-878 Great Falls Multiple 3/1/2013
406-879 Havre Multiple 11/11/2009
406-880 Missoula Cellco Partnership N/A
406-881 Olney Multiple N/A
406-882 Eureka Rural Interbel Tel. Coop. N/A
406-883 Polson Centurytel Of Montana N/A
406-884 Polson Multiple N/A
406-885 Kalispell Cellco Partnership N/A
406-886 Swan Lake Multiple N/A
406-887 Finley Point Multiple N/A
406-888 West Glacier Multiple N/A
406-889 Eureka Rural Interbel Tel. Coop. N/A
406-890 Kalispell Multiple N/A
406-891 Baker Multiple N/A
406-892 Columbia Falls Centurytel Of Montana N/A
406-893 Peerless Multiple N/A
406-894 Billings Multiple N/A
406-895 Outlook Multiple N/A
406-896 Billings Qwest Corporation N/A
406-897 Columbia Falls Multiple N/A
406-898 Bozeman Multiple 3/20/2009
406-899 Great Falls New Cingular Wireless PCS N/A
406-900-XXXX --- 406-999-XXXX
NPANXX Area served[1] Provider[2] Date[3]
406-900 Ennis Multiple 9/29/2017
406-901 Billings Multiple 4/14/2021
406-902 Sheridan Multiple 11/27/2018
406-905 Joliet Multiple 10/3/2011
406-909 Columbia Falls Multiple 5/24/2018
406-913 Roundup Cellco Partnership N/A
406-914 Lambert Cellco Partnership N/A
406-915 South Wolf Point Cellco Partnership N/A
406-916 Helena Multiple 3/24/2017
406-919 Belgrade Multiple 3/4/2019
406-920 Bozeman Multiple N/A
406-922 Bozeman Multiple N/A
406-923 Great Falls Multiple 1/3/2005
406-924 Belgrade Multiple 10/26/2004
406-925 Dillon Multiple N/A
406-926 Missoula Multiple 1/7/2011
406-927 Billings Multiple 7/23/2010
406-928 Grass Range Cellco Partnership N/A
406-929 Hungry Horse Multiple 7/26/2007
406-930 Big Timber Multiple N/A
406-931 Big Timber Multiple N/A
406-932 Big Timber Multiple N/A
406-933 Helena Multiple N/A
406-934 Miles City Multiple N/A
406-935 Broadus Multiple N/A
406-936 Clyde Park Multiple 7/15/2015
406-937 Sunburst Northern Tel. Coop. N/A
406-938 Alzada Multiple N/A
406-939 West Glendive Multiple N/A
406-940 Molt Multiple 7/18/2017
406-941 West Glendive Multiple N/A
406-942 Glasgow Multiple 10/23/2009
406-943 Sidney Multiple 1/9/2003
406-944 Miles City Multiple 1/9/2003
406-945 Havre Multiple N/A
406-946 Livingston Multiple 1/9/2003
406-947 Musselshell Mid-Rivers Tel. Coop. N/A
406-948 Glendive Multiple 1/9/2003
406-949 Townsend Multiple N/A
406-951 Miles City Multiple N/A
406-952 Great Falls Multiple N/A
406-953 Hardin Multiple N/A
406-954 Roy Cellco Partnership N/A
406-955 Kalispell Multiple 12/04/2023
406-956 Baker New Cingular Wireless PCS 10/20/2010
406-957 Terry Multiple N/A
406-960 Dillon Level 3 Communications 1/9/2003
406-961 Hamilton Multiple N/A
406-962 Joliet Multiple N/A
406-963 Froid Rural Multiple N/A
406-964 Great Falls Multiple N/A
406-965 Great Falls Multiple N/A
406-966 Shelby Multiple 1/9/2003
406-967 Worden Multiple N/A
406-968 Lewistown Multiple 1/9/2003
406-969 Billings Multiple N/A
406-970 Billings Multiple 6/3/2016
406-971 Plevna Multiple N/A
406-972 West Camp Crook West River Cooperative Telephone Company N/A
406-973 Sidney Multiple N/A
406-974 Circle Multiple N/A
406-975 Ekalaka Multiple N/A
406-977 Jordan Multiple N/A
406-978 Baker Multiple N/A
406-979 Richey Cellco Partnership N/A
406-980 Townsend Multiple N/A
406-981 South Miles City Cellco Partnership N/A
406-982 Yellow Bay Multiple N/A
406-983 Ashland Multiple N/A
406-984 Birney Range Tel Coop Inc N/A
406-987 Glendive Multiple N/A
406-988 Dillon Multiple 1/7/2005
406-989 West Glendive Multiple N/A
406-990 Lame Deer Multiple 5/12/2020
406-991 Marion Multiple 10/11/2007
406-992 Helena Onvoy 8/26/2008
406-993 Big Sky Multiple N/A
406-994 Bozeman Qwest Corporation N/A
406-995 Big Sky 3 Rivers Tel. Coop. N/A
406-996 Helena Charter IP Enabled Services 1/10/2011
406-997 Fromberg Multiple 01/24/2024
406-998 Billings Multiple 8/26/2015
406-999 Big Sky Montana Opticom 7/11/2006
  1. 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.
  2. A single provider refers to the original company controlling a whole NPA-NXX block (10,000 phone numbers). With Number Pooling, NPA-NXX blocks can be split into ten 1,000 phone number blocks and handed over to other service providers (available in the USA and Puerto Rico).
  3. Assignment date. N/A: unavailable date or central office code assigned before 2001.
  4. NXX prefixes last updated: December 15, 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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