Local Calling Guide
Area code/prefix search
NPA: 406
[Rate centres in NPA 406]
[Dial plan for NPA 406]
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-916
| 1 |
Helena |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2022-08-27 |
|
| 406-916
| 2 |
Helena |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2021-03-12 |
|
| 406-916
| 3 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-11-30 |
|
| 406-916
| 4 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-11-30 |
|
| 406-916
| 5 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-11-30 |
|
| 406-916
| 6 |
Helena |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2020-07-30 |
|
| 406-916
| 7 |
Helena |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2019-03-18 |
|
| 406-916
| 8 |
Helena |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2017-05-25 |
|
| 406-916
| 9 |
Helena |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2017-05-25 |
|
| 406-918
| A |
Libby |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
960 |
|
2026-03-14 |
|
| 406-918
| 9 |
Libby |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
960 |
|
2026-03-14 |
|
| 406-919
| A |
Belgrade |
MT |
BLNGMT939MD |
145J TERRA NOVA TELECOM INC. |
650 |
|
|
|
| 406-919
| 0 |
Belgrade |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2021-07-05 |
|
| 406-919
| 1 |
Belgrade |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2021-03-07 |
|
| 406-919
| 2 |
Belgrade |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2021-03-07 |
|
| 406-919
| 3 |
Belgrade |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2021-07-05 |
|
| 406-919
| 4 |
Belgrade |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2021-07-12 |
|
| 406-919
| 5 |
Belgrade |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2021-07-12 |
|
| 406-919
| 6 |
Belgrade |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2021-11-26 |
|
| 406-919
| 7 |
Belgrade |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2021-11-26 |
|
| 406-919
| 8 |
Belgrade |
MT |
|
771G TELEPORT COMMUNICATIONS AMERICA MT - LLC |
650 |
|
2024-11-04 |
|
| 406-919
| 9 |
Belgrade |
MT |
|
145J TERRA NOVA TELECOM INC. |
650 |
|
2019-04-27 |
|
| 406-920
| A |
Bozeman |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-920
| 0 |
Bozeman |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-920
| 1 |
Bozeman |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-920
| 2 |
Bozeman |
MT |
|
145J TERRA NOVA TELECOM INC. |
650 |
|
2022-08-03 |
|
| 406-920
| 3 |
Bozeman |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2022-06-26 |
|
| 406-920
| 4 |
Bozeman |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2019-09-15 |
|
| 406-920
| 5 |
Bozeman |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2021-04-15 |
|
| 406-920
| 6 |
Bozeman |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2022-07-22 |
|
| 406-920
| 7 |
Bozeman |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2021-07-05 |
|
| 406-920
| 8 |
Bozeman |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2021-04-13 |
|
| 406-920
| 9 |
Bozeman |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2020-12-14 |
|
| 406-922
| A |
Bozeman |
MT |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-922
| 0 |
Bozeman |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-922
| 1 |
Bozeman |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-922
| 2 |
Bozeman |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-922
| 3 |
Bozeman |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-922
| 4 |
Bozeman |
MT |
|
145J TERRA NOVA TELECOM INC. |
650 |
|
2022-01-05 |
|
| 406-922
| 5 |
Bozeman |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-922
| 6 |
Bozeman |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-922
| 7 |
Bozeman |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2022-02-25 |
|
| 406-922
| 8 |
Bozeman |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2024-05-26 |
|
| 406-922
| 9 |
Bozeman |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2022-08-28 |
|
| 406-923
| A |
Great Falls |
MT |
MSSLMTXC3MD |
939H COMMIO, LLC |
648 |
|
|
|
| 406-923
| 3 |
Great Falls |
MT |
|
939H COMMIO, LLC |
648 |
|
2023-03-26 |
|
| 406-923
| 8 |
Great Falls |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2022-11-21 |
|
| 406-923
| 9 |
Great Falls |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2022-11-21 |
|
| 406-924
| A |
Belgrade |
MT |
BLNGMTWE6MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
|
|
| 406-924
| 0 |
Belgrade |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2011-04-29 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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