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 98 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-909
| 8 |
Columbia Falls |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2019-10-28 |
|
| 406-909
| 9 |
Columbia Falls |
MT |
GRFLMTMAKMD |
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-10-30 |
|
| 406-913
| A |
Roundup |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-913
| 0 |
Roundup |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-913
| 1 |
Roundup |
MT |
BLNGMT939MD |
145J TERRA NOVA TELECOM INC. |
650 |
|
2026-04-30 |
|
| 406-913
| 9 |
Roundup |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-914
| A |
Lambert |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-914
| 3 |
Lambert |
MT |
|
145J TERRA NOVA TELECOM INC. |
650 |
|
2025-08-29 |
|
| 406-915
| A |
South Wolf Point |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-916
| A |
Helena |
MT |
HLNAMTMAWMD |
6529 T-MOBILE USA, INC. |
648 |
|
|
|
| 406-916
| 0 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2025-11-24 |
|
| 406-916
| 1 |
Helena |
MT |
HLNAMTMAWMD |
6529 T-MOBILE USA, INC. |
648 |
|
2022-08-27 |
|
| 406-916
| 2 |
Helena |
MT |
HLNAMTMAWMD |
6529 T-MOBILE USA, INC. |
648 |
|
2021-03-12 |
|
| 406-916
| 3 |
Helena |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2020-11-30 |
|
| 406-916
| 4 |
Helena |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2020-11-30 |
|
| 406-916
| 5 |
Helena |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2020-11-30 |
|
| 406-916
| 6 |
Helena |
MT |
HLNAMTMAWMD |
6529 T-MOBILE USA, INC. |
648 |
|
2020-07-30 |
|
| 406-916
| 7 |
Helena |
MT |
HLNAMTMAWMD |
6529 T-MOBILE USA, INC. |
648 |
|
2019-03-18 |
|
| 406-916
| 8 |
Helena |
MT |
HLNAMTMAWMD |
6529 T-MOBILE USA, INC. |
648 |
|
2017-05-25 |
|
| 406-916
| 9 |
Helena |
MT |
HLNAMTMAWMD |
6529 T-MOBILE USA, INC. |
648 |
|
2017-05-25 |
|
| 406-918
| A |
Libby |
MT |
CRALIDABXMD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
960 |
|
2026-03-14 |
|
| 406-918
| 0 |
Libby |
MT |
CRALIDXXGMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
960 |
|
2026-03-16 |
|
| 406-918
| 9 |
Libby |
MT |
CRALIDABXMD |
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 |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2021-07-05 |
|
| 406-919
| 1 |
Belgrade |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2021-03-07 |
|
| 406-919
| 2 |
Belgrade |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2021-03-07 |
|
| 406-919
| 3 |
Belgrade |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2021-07-05 |
|
| 406-919
| 4 |
Belgrade |
MT |
BLNGMTMALMD |
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2021-07-12 |
|
| 406-919
| 5 |
Belgrade |
MT |
BLNGMTMALMD |
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2021-07-12 |
|
| 406-919
| 6 |
Belgrade |
MT |
BLNGMTMALMD |
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2021-11-26 |
|
| 406-919
| 7 |
Belgrade |
MT |
BLNGMTMALMD |
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2021-11-26 |
|
| 406-919
| 8 |
Belgrade |
MT |
BLNGMTWEBMD |
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 |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-920
| 1 |
Bozeman |
MT |
BLNGMTWEIMD |
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 |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2022-06-26 |
|
| 406-920
| 4 |
Bozeman |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-09-15 |
|
| 406-920
| 5 |
Bozeman |
MT |
BLNGMTMAXMD |
6529 T-MOBILE USA, INC. |
650 |
|
2021-04-15 |
|
| 406-920
| 6 |
Bozeman |
MT |
BLNGMTMAMMD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2022-07-22 |
|
| 406-920
| 7 |
Bozeman |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2021-07-05 |
|
| 406-920
| 8 |
Bozeman |
MT |
BLNGMTMAMMD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2021-04-13 |
|
| 406-920
| 9 |
Bozeman |
MT |
BLNGMTMAXMD |
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 |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-922
| 1 |
Bozeman |
MT |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-922
| 2 |
Bozeman |
MT |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-922
| 3 |
Bozeman |
MT |
BLNGMT20PS0 |
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
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Last updated: Thu, 16 Jul 2026 02:21:55 UTC
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