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 99 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-306
| 9 |
Manhattan |
MT |
BLNGMT933MD |
073H TELNYX LLC |
650 |
|
2020-01-17 |
|
| 406-307
| A |
Canyon Creek |
MT |
HLNAMTHH5MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2025-05-02 |
|
| 406-307
| 1 |
Canyon Creek |
MT |
HLNAMTHH5MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2025-05-02 |
|
| 406-308
| A |
Cascade |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-308
| 0 |
Cascade |
MT |
GRFLMTMAHMD |
073H TELNYX LLC |
648 |
|
2020-08-07 |
|
| 406-308
| 1 |
Cascade |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2020-11-08 |
|
| 406-308
| 2 |
Cascade |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2020-01-03 |
|
| 406-308
| 3 |
Cascade |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2020-06-05 |
|
| 406-308
| 4 |
Cascade |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2020-01-03 |
|
| 406-308
| 5 |
Cascade |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2019-10-28 |
|
| 406-308
| 6 |
Cascade |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2019-09-15 |
|
| 406-308
| 7 |
Cascade |
MT |
GRFLMTMAKMD |
624H ONVOY SPECTRUM, LLC |
648 |
|
2025-02-02 |
|
| 406-308
| 8 |
Cascade |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2023-04-24 |
|
| 406-308
| 9 |
Cascade |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2020-11-03 |
|
| 406-309
| A |
Kalispell |
MT |
KLSLMTAZ1MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
|
|
| 406-309
| 0 |
Kalispell |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2013-03-12 |
|
| 406-309
| 1 |
Kalispell |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2013-03-12 |
|
| 406-309
| 2 |
Kalispell |
MT |
KLSLMTAZ1MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2011-12-01 |
|
| 406-309
| 3 |
Kalispell |
MT |
HLNAMTMAMMD |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
648 |
|
2019-02-14 |
|
| 406-309
| 4 |
Kalispell |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2012-09-10 |
|
| 406-309
| 5 |
Kalispell |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2012-10-06 |
|
| 406-309
| 6 |
Kalispell |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2018-08-26 |
|
| 406-309
| 7 |
Kalispell |
MT |
GRFLMTMAHMD |
073H TELNYX LLC |
648 |
|
2020-08-13 |
|
| 406-309
| 8 |
Kalispell |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2019-02-19 |
|
| 406-309
| 9 |
Kalispell |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2019-02-19 |
|
| 406-310
| A |
Butte |
MT |
BUTTMTAQ2MD |
7870 BLACKFOOT COMMUNICATIONS, INC. - MT |
648 |
|
|
|
| 406-310
| 0 |
Butte |
MT |
|
145J TERRA NOVA TELECOM INC. |
648 |
|
2025-10-09 |
|
| 406-310
| 1 |
Butte |
MT |
HLNAMTMAWMD |
6529 T-MOBILE USA, INC. |
648 |
|
2024-07-07 |
|
| 406-310
| 2 |
Butte |
MT |
HLNAMTMAWMD |
6529 T-MOBILE USA, INC. |
648 |
|
2024-04-04 |
|
| 406-310
| 3 |
Butte |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-07-05 |
|
| 406-310
| 4 |
Butte |
MT |
BUTTMTAQ2MD |
7870 BLACKFOOT COMMUNICATIONS, INC. - MT |
648 |
|
2021-05-14 |
|
| 406-310
| 5 |
Butte |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-07-05 |
|
| 406-310
| 6 |
Butte |
MT |
HLNAMTMAWMD |
6529 T-MOBILE USA, INC. |
648 |
|
2021-02-07 |
|
| 406-310
| 7 |
Butte |
MT |
HLNAMTMAWMD |
5562 METROPCS, INC. |
648 |
|
2017-07-22 |
|
| 406-310
| 8 |
Butte |
MT |
HLNAMTMAWMD |
5562 METROPCS, INC. |
648 |
|
2017-07-22 |
|
| 406-310
| 9 |
Butte |
MT |
HLNAMTMAWMD |
6529 T-MOBILE USA, INC. |
648 |
|
2019-09-14 |
|
| 406-312
| A |
Bozeman |
MT |
BLNGMT93AMD |
478J NUSO, LLC |
650 |
|
|
|
| 406-312
| 0 |
Bozeman |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-312
| 1 |
Bozeman |
MT |
BLNGMT93DS0 |
588H AIRUS, INC. - MT |
650 |
|
2019-04-29 |
|
| 406-312
| 2 |
Bozeman |
MT |
BLNGMT93AMD |
478J NUSO, LLC |
650 |
|
2020-07-17 |
|
| 406-312
| 3 |
Bozeman |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-312
| 4 |
Bozeman |
MT |
BLNGMTWE6MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2025-02-10 |
|
| 406-312
| 5 |
Bozeman |
MT |
BLNGMTMALMD |
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2020-05-10 |
|
| 406-312
| 6 |
Bozeman |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-01-05 |
|
| 406-312
| 7 |
Bozeman |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-01-05 |
|
| 406-312
| 8 |
Bozeman |
MT |
BLNGMT93DS0 |
588H AIRUS, INC. - MT |
650 |
|
2019-12-05 |
|
| 406-312
| 9 |
Bozeman |
MT |
BLNGMTMALMD |
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2020-05-10 |
|
| 406-313
| A |
Boulder |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-313
| 0 |
Boulder |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2013-01-17 |
|
| 406-313
| 1 |
Boulder |
MT |
HLNAMTHH5MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2019-06-14 |
|
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Last updated: Sat, 10 Oct 2026 15:24:20 UTC
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