Montana, United States
Mountain Time
7:16 PM
Area Code
406
State / Province
Montana
Country
United States
Time Zone
Mountain Time
Area code 406 covers 260 cities and communities across Montana, based on telephone company rate center data.
Use the E.164 format for clickable phone links (RFC 3966):
<a href="tel:+14065550100">+14065550100</a><a href="tel:+14065550199">+14065550199</a>Look up which exchange in Montana a specific 406 number is homed to, and whether its block is wireline or wireless. See what a reverse lookup can establish before relying on the answer.
754 active prefixes in this area code, assigned as 4,918 thousands-blocks — pooling splits one prefix across several carriers, so each block is listed separately with the rate centre it is homed to, its carrier of record, and the switch that serves it.
Showing blocks 1–100 of 4,918
| NPA-NXX | Block | Rate centre | Type | Carrier (OCN) | Switch | LATA | LIR | Dates |
|---|---|---|---|---|---|---|---|---|
| 406-200 | 0 | Billings | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (6564) | BLNGMTWEIMD | 650 | — | — |
| 406-200 | 1 | Billings | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (6564) | BLNGMTWEIMD | 650 | — | — |
| 406-200 | 2 | Billings | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (6564) | BLNGMTWEIMD | 650 | — | — |
| 406-200 | 3 | Billings | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (6564) | BLNGMTWEIMD | 650 | — | — |
| 406-200 | 4 | Billings | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (6564) | BLNGMTWEIMD | 650 | — | — |
| 406-200 | 5 | Billings | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (6564) | BLNGMTWEIMD | 650 | — | — |
| 406-200 | 6 | Billings | Landline or VoIP | TELEPORT COMMUNICATIONS AMERICA MT - LLC (771G) | BLNGMTWEBMD | 650 | — | — |
| 406-200 | 7 | Billings | Landline or VoIP | CHARTER IP ENABLED SERVICES, LLC (792K) | BLNGMT93HMD | 650 | — | — |
| 406-200 | 8 | Billings | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - MT (994E) | BLNGMTMALMD | 650 | — | — |
| 406-200 | 9 | Billings | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - MT (994E) | BLNGMTMALMD | 650 | — | — |
| 406-200 | A | Billings | Landline or VoIP | TELEPORT COMMUNICATIONS AMERICA MT - LLC (771G) | BLNGMTWEBMD | 650 | — | — |
| 406-201 | 0 | Forsyth | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-201 | 1 | Forsyth | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - MT (994E) | BLNGMTMALMD | 650 | — | — |
| 406-201 | 2 | Forsyth | Landline or VoIP | ONVOY, LLC - MT (453F) | BLNGMTAS9MD | 650 | — | — |
| 406-201 | 3 | Forsyth | Landline or VoIP | ONVOY, LLC - MT (453F) | BLNGMTAS9MD | 650 | — | — |
| 406-201 | 4 | Forsyth | Landline or VoIP | ONVOY, LLC - MT (453F) | BLNGMTAS9MD | 650 | — | — |
| 406-201 | 5 | Forsyth | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - MT (994E) | BLNGMTMALMD | 650 | — | — |
| 406-201 | 6 | Forsyth | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - MT (994E) | BLNGMTMALMD | 650 | — | — |
| 406-201 | 7 | Forsyth | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - MT (994E) | BLNGMTMALMD | 650 | — | — |
| 406-201 | 8 | Forsyth | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - MT (994E) | BLNGMTMALMD | 650 | — | — |
| 406-201 | 9 | Forsyth | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - MT (994E) | BLNGMTMALMD | 650 | — | — |
| 406-201 | A | Forsyth | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-202 | 0 | Helena | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-202 | 1 | Helena | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-202 | 2 | Helena | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-202 | 3 | Helena | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-202 | 4 | Helena | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-202 | 5 | Helena | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-202 | 6 | Helena | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-202 | 7 | Helena | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (6564) | HLNAMTMAX1X | 648 | — | — |
| 406-202 | 8 | Helena | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-202 | 9 | Helena | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-202 | A | Helena | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-203 | 0 | Missoula | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-203 | 1 | Missoula | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-203 | 2 | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-203 | 3 | Missoula | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-203 | 4 | Missoula | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-203 | 5 | Missoula | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-203 | 6 | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-203 | 7 | Missoula | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (6564) | HLNAMTMAX1X | 648 | — | — |
| 406-203 | 8 | Missoula | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (6564) | HLNAMTMAX1X | 648 | — | — |
| 406-203 | 9 | Missoula | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-203 | A | Missoula | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-204 | 0 | Helena | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-204 | 1 | Helena | Landline or VoIP | ONVOY, LLC - MT (453F) | GRFLMTMA7MD | 648 | — | — |
| 406-204 | 2 | Helena | Landline or VoIP | ONVOY, LLC - MT (453F) | GRFLMTMA7MD | 648 | — | — |
| 406-204 | 3 | Helena | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-204 | 4 | Helena | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-204 | 5 | Helena | Landline or VoIP | ONVOY, LLC - MT (453F) | GRFLMTMA7MD | 648 | — | — |
| 406-204 | 6 | Helena | Landline or VoIP | TELNYX LLC (073H) | GRFLMTMAHMD | 648 | — | — |
| 406-204 | 7 | Helena | Landline or VoIP | ONVOY, LLC - MT (453F) | GRFLMTMA7MD | 648 | — | — |
| 406-204 | 8 | Helena | Landline or VoIP | METROPCS, INC. (5562) | HLNAMTMAWMD | 648 | — | — |
| 406-204 | 9 | Helena | Landline or VoIP | METROPCS, INC. (5562) | HLNAMTMAWMD | 648 | — | — |
| 406-204 | A | Helena | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-205 | 0 | Great Falls | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-205 | 1 | Great Falls | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-205 | 2 | Great Falls | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-205 | 3 | Great Falls | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-205 | 4 | Great Falls | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-205 | 5 | Great Falls | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-205 | 6 | Great Falls | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-205 | 7 | Great Falls | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-205 | 8 | Great Falls | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-205 | 9 | Great Falls | Landline or VoIP | TELNYX LLC (073H) | GRFLMTMAHMD | 648 | — | — |
| 406-205 | A | Great Falls | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | MSSLMTMA0MD | 648 | — | — |
| 406-206 | A | Billings | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - MT (9415) | BLNGMTWE6MD | 650 | — | — |
| 406-207 | 0 | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-207 | 1 | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-207 | 2 | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-207 | 3 | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-207 | 4 | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-207 | 5 | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-207 | 6 | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-207 | 7 | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-207 | 8 | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-207 | 9 | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-207 | A | Missoula | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | MSSLMTAG5MD | 648 | — | — |
| 406-208 | 0 | Billings | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-208 | 1 | Billings | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-208 | 2 | Billings | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-208 | 3 | Billings | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-208 | 4 | Billings | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-208 | 5 | Billings | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-208 | 6 | Billings | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-208 | 7 | Billings | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-208 | 8 | Billings | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-208 | 9 | Billings | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-208 | A | Billings | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-209 | 0 | Bozeman | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-209 | 1 | Bozeman | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-209 | 2 | Bozeman | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-209 | 3 | Bozeman | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-209 | 4 | Bozeman | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-209 | 5 | Bozeman | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-209 | 6 | Bozeman | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-209 | 7 | Bozeman | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
| 406-209 | 8 | Bozeman | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - MT (994E) | BLNGMTMALMD | 650 | — | — |
| 406-209 | 9 | Bozeman | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - MT (994E) | BLNGMTMALMD | 650 | — | — |
| 406-209 | A | Bozeman | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BLNGMTMAMMD | 650 | — | — |
Block-level assignments from the North American Numbering Plan administrator, via localcallingguide.com.
Assigned Prefixes
754
Assignment Blocks
4,918
Rate Centers
260
Carriers of Record
64
| Type | Blocks | Share |
|---|---|---|
| Landline | 1,237 | 25% |
| Landline or VoIP | 2,130 | 43% |
| Wireless | 1,551 | 32% |
| Carrier | Blocks |
|---|---|
| ONVOY, LLC - MT | 905 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 787 |
| QWEST CORPORATION | 547 |
| NEW CINGULAR WIRELESS PCS, LLC | 423 |
| LEVEL 3 COMMUNICATIONS, LLC - MT | 221 |
| BANDWIDTH.COM CLEC, LLC - MT | 184 |
| T-MOBILE USA, INC. | 172 |
| CHARTER IP ENABLED SERVICES, LLC | 145 |
| TRIANGLE TEL. COOP. ASSN., INC. | 141 |
| TERRA NOVA TELECOM INC. | 138 |
| 54 other carriers | 1,255 |
Carrier of record for each block. Numbers ported to another carrier keep their original block assignment, so this is not a lookup of who serves a given number today.
| Rate Center | Prefixes | Blocks |
|---|---|---|
| Billings | 72 | 511 |
| Missoula | 47 | 290 |
| Helena | 38 | 251 |
| Great Falls | 37 | 238 |
| Bozeman | 32 | 201 |
| Kalispell | 25 | 145 |
| Butte | 17 | 136 |
| Miles City | 10 | 76 |
| Sidney | 9 | 71 |
| Hamilton | 8 | 68 |
| Lewistown | 8 | 65 |
| Livingston | 8 | 66 |
| Dillon | 7 | 44 |
| Hardin | 7 | 68 |
| Havre | 7 | 63 |
| Shelby | 7 | 54 |
| Columbus | 6 | 64 |
| Glendive | 6 | 56 |
| Laurel | 6 | 61 |
| Libby | 6 | 58 |
| Red Lodge | 6 | 57 |
| Anaconda | 5 | 49 |
| Colstrip | 5 | 53 |
| Conrad | 5 | 45 |
| Forsyth | 5 | 55 |
| Baker | 4 | 21 |
| Belgrade | 4 | 34 |
| Boulder | 4 | 37 |
| Cut Bank | 4 | 41 |
| Glasgow | 4 | 19 |
| Manhattan | 4 | 44 |
| Polson | 4 | 27 |
| Roundup | 4 | 20 |
| Townsend | 4 | 34 |
| West Glendive | 4 | 28 |
| Whitefish | 4 | 26 |
| Big Sky | 3 | 23 |
| Big Timber | 3 | 22 |
| Bigfork | 3 | 33 |
| Columbia Falls | 3 | 23 |
| Culbertson | 3 | 15 |
| Deer Lodge | 3 | 29 |
| Eureka Rural | 3 | 3 |
| Fromberg | 3 | 26 |
| Malta | 3 | 21 |
| Pablo | 3 | 6 |
| Ronan | 3 | 7 |
| Seeley Lake | 3 | 33 |
| South Havre | 3 | 25 |
| St Ignatius | 3 | 11 |
| St Regis | 3 | 10 |
| Superior | 3 | 15 |
| Terry | 3 | 27 |
| Thompson Falls | 3 | 17 |
| West Yellowstone | 3 | 33 |
| Absarokee | 2 | 11 |
| Alzada | 2 | 10 |
| Ashland | 2 | 10 |
| Bridger | 2 | 21 |
| Broadus | 2 | 12 |
| Browning | 2 | 16 |
| Canyon Creek | 2 | 3 |
| Cascade | 2 | 22 |
| Circle | 2 | 16 |
| Clinton | 2 | 9 |
| Clyde Park | 2 | 22 |
| Cooke City | 2 | 22 |
| Darby | 2 | 16 |
| Divide | 2 | 4 |
| East Glacier Park | 2 | 16 |
| Ekalaka | 2 | 12 |
| Elmo | 2 | 22 |
| Ennis | 2 | 19 |
| Fairfield | 2 | 13 |
| Fairview | 2 | 22 |
| Finley Point | 2 | 20 |
| Fort Benton | 2 | 14 |
| Frenchtown | 2 | 22 |
| Gallatin Gateway | 2 | 22 |
| Gardiner | 2 | 22 |
| Grass Range | 2 | 7 |
| Hays | 2 | 13 |
| Hungry Horse | 2 | 22 |
| Joliet | 2 | 21 |
| Jordan | 2 | 14 |
| Lakeside | 2 | 21 |
| Lambert | 2 | 8 |
| Lame Deer | 2 | 10 |
| Lima | 2 | 9 |
| Marion | 2 | 19 |
| Molt | 2 | 6 |
| North Havre | 2 | 15 |
| North Parkman | 2 | 17 |
| Olney | 2 | 17 |
| Plevna | 2 | 11 |
| Richey | 2 | 10 |
| Roy | 2 | 7 |
| Scobey | 2 | 7 |
| Sheridan | 2 | 13 |
| Silvertip | 2 | 20 |
| Somers | 2 | 21 |
| South Miles City | 2 | 8 |
| South Wolf Point | 2 | 5 |
| Stevensville | 2 | 22 |
| Swan Lake | 2 | 19 |
| Three Forks | 2 | 22 |
| Victor | 2 | 17 |
| White Sulphur Springs | 2 | 9 |
| Whitehall | 2 | 22 |
| Wibaux | 2 | 19 |
| Wilsall | 2 | 22 |
| Wolf Creek | 2 | 22 |
| Wolf Point | 2 | 8 |
| Yellow Bay | 2 | 19 |
| Alberton | 1 | 10 |
| Alta | 1 | 1 |
| Arlee | 1 | 7 |
| Augusta | 1 | 1 |
| Avon | 1 | 1 |
| Bainville | 1 | 4 |
| Belfry | 1 | 1 |
| Belt | 1 | 1 |
| Big Sandy | 1 | 11 |
| Birney | 1 | 2 |
| Bloomfield | 1 | 1 |
| Box Elder | 1 | 1 |
| Brady | 1 | 1 |
| Broadview | 1 | 1 |
| Brockton | 1 | 3 |
| Busby | 1 | 3 |
| Carlyle | 1 | 1 |
| Carter | 1 | 1 |
| Charlo | 1 | 7 |
| Chester | 1 | 6 |
| Chinook | 1 | 11 |
| Choteau | 1 | 11 |
| Condon | 1 | 1 |
| Crooked Creek | 1 | 6 |
| Custer | 1 | 1 |
| Dagmar | 1 | 1 |
| Decker | 1 | 10 |
| Denton | 1 | 1 |
| Devon | 1 | 1 |
| Dixon | 1 | 1 |
| Dodson | 1 | 1 |
| Drummond | 1 | 1 |
| Dupuyer | 1 | 1 |
| Dutton | 1 | 11 |
| East Conrad | 1 | 1 |
| Ethridge | 1 | 1 |
| Eureka | 1 | 11 |
| Fallon | 1 | 1 |
| Flaxville | 1 | 1 |
| Flaxville Rural | 1 | 4 |
| Fort Peck | 1 | 4 |
| Fort Shaw | 1 | 1 |
| Fort Smith | 1 | 1 |
| Frazer | 1 | 3 |
| Froid | 1 | 1 |
| Froid Rural | 1 | 3 |
| Geraldine | 1 | 1 |
| Geyser | 1 | 1 |
| Gildford | 1 | 1 |
| Glentana | 1 | 3 |
| Grant | 1 | 1 |
| Harlem | 1 | 11 |
| Harlowton | 1 | 10 |
| Harrison | 1 | 1 |
| Haugan | 1 | 1 |
| Highwood | 1 | 1 |
| Hingham | 1 | 1 |
| Hinsdale | 1 | 1 |
| Hobson | 1 | 1 |
| Hopp-Illiad | 1 | 1 |
| Hot Springs | 1 | 1 |
| Huntley | 1 | 11 |
| Hysham | 1 | 10 |
| Jackson | 1 | 1 |
| Joplin | 1 | 7 |
| Judith Gap | 1 | 1 |
| Kevin-Oilmont | 1 | 1 |
| Kremlin | 1 | 1 |
| Larslan | 1 | 1 |
| Lavina | 1 | 1 |
| Lincoln | 1 | 1 |
| Lindsay | 1 | 3 |
| Lodge Grass | 1 | 1 |
| Loma | 1 | 1 |
| Martinsdale | 1 | 1 |
| Medicine Lake | 1 | 3 |
| Melrose | 1 | 1 |
| Melstone | 1 | 1 |
| Melville | 1 | 1 |
| Moore | 1 | 1 |
| Musselshell | 1 | 1 |
| Nashua | 1 | 1 |
| Neihart | 1 | 1 |
| North Broadus | 1 | 1 |
| North Cut Bank | 1 | 1 |
| North Frannie | 1 | 4 |
| North Glasgow | 1 | 1 |
| North Hinsdale | 1 | 3 |
| North Nashua | 1 | 4 |
| North Poplar | 1 | 4 |
| North Ryegate | 1 | 1 |
| North Wolf Point | 1 | 3 |
| Noxon | 1 | 1 |
| Opheim | 1 | 3 |
| Outlook | 1 | 3 |
| Ovando | 1 | 1 |
| Peerless | 1 | 3 |
| Pendroy | 1 | 1 |
| Philipsburg | 1 | 1 |
| Plains | 1 | 11 |
| Plentywood | 1 | 9 |
| Pompeys Pillar | 1 | 1 |
| Poplar | 1 | 8 |
| Potomac | 1 | 1 |
| Power | 1 | 1 |
| Rapelje | 1 | 1 |
| Raynesford | 1 | 1 |
| Reedpoint | 1 | 1 |
| Reserve | 1 | 3 |
| Ridge | 1 | 1 |
| Rock Springs | 1 | 1 |
| Rosebud | 1 | 1 |
| Rudyard | 1 | 1 |
| Ryegate | 1 | 7 |
| Saco | 1 | 4 |
| Savage | 1 | 1 |
| Scobey Rural | 1 | 6 |
| South Alberton | 1 | 1 |
| South Broadus | 1 | 1 |
| South Chester | 1 | 1 |
| South Malta | 1 | 1 |
| St Mary | 1 | 11 |
| Stanford | 1 | 9 |
| Stockett | 1 | 10 |
| Sunburst | 1 | 1 |
| Sweetgrass | 1 | 1 |
| Troy | 1 | 11 |
| Turner | 1 | 1 |
| Twin Bridges | 1 | 1 |
| Valier | 1 | 1 |
| Valley Industrial Park | 1 | 4 |
| Virginia City | 1 | 1 |
| Warm Springs | 1 | 11 |
| West Beach | 1 | 1 |
| West Camp Crook | 1 | 1 |
| West Glacier | 1 | 11 |
| West Homesteaders Gap | 1 | 1 |
| West Sidney | 1 | 1 |
| Westby | 1 | 3 |
| Whitewater | 1 | 11 |
| Winifred | 1 | 1 |
| Winnett | 1 | 10 |
| Wisdom | 1 | 1 |
| Wise River | 1 | 1 |
| Worden | 1 | 11 |
| Wyola | 1 | 9 |
A rate center is the telephone exchange area a number is homed to. It sets local calling boundaries, and is not the caller's current location.
Area code 406 is a North American Numbering Plan (NANP) telephone area code assigned to Montana, United States. It is the sole area code assigned to Montana, covering the entire state or province under a single numbering plan area.
Yes. 406 is an active North American Numbering Plan (NANP) area code, currently assigned to Montana, United States. It is safe to answer or dial calls using this area code.
Area code 406 covers 260 cities and communities in Montana, including Absarokee, Alberton, Alta, Alzada, Anaconda, and 255 more localities. This is based on telephone company rate center data — the geographic areas carriers use to determine local calling boundaries and to assign numbers when a business or individual requests a phone number in a specific city.
All numbers in the 406 area code observe Mountain Time (IANA timezone: America/Denver). Mountain Time is UTC−7 in winter (MST) and UTC−6 in summer (MDT). When placing a call to a 406 number from a different time zone, check the current local time above to avoid calling outside of business hours.
From within Montana, dial the 7-digit local number directly if calling within the same rate center, or dial 1 + 406 + 7-digit number for long-distance calls within North America. From outside the US or Canada, dial your country's international exit code followed by 1 406 XXX XXXX. The country code for both the United States and Canada in NANP is +1.
Format 406 numbers using E.164 notation as required by RFC 3966: prefix with +1 and omit dashes and parentheses (e.g., +14065550100). This format ensures tel: links work correctly on all mobile browsers and VoIP apps. See the tel: URI formatting guide for complete examples.