Local Calling Guide
Area code/prefix search
NPA: 406
[Rate centres in NPA 406]
[Dial plan for NPA 406]
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| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-602
| 8 |
Bozeman |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2020-08-08 |
|
| 406-602
| 9 |
Bozeman |
MT |
|
588H AIRUS, INC. - MT |
650 |
|
2021-04-19 |
|
| 406-603
| A |
Helena |
MT |
HLNAMTHO3MD |
7870 BLACKFOOT COMMUNICATIONS, INC. - MT |
648 |
|
|
|
| 406-603
| 0 |
Helena |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2014-07-12 |
|
| 406-603
| 4 |
Helena |
MT |
|
7870 BLACKFOOT COMMUNICATIONS, INC. - MT |
648 |
|
2013-12-30 |
|
| 406-604
| A |
Great Falls |
MT |
GRFLMTMARS0 |
7870 BLACKFOOT COMMUNICATIONS, INC. - MT |
648 |
|
|
|
| 406-604
| 0 |
Great Falls |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-01-22 |
|
| 406-604
| 1 |
Great Falls |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-01-22 |
|
| 406-604
| 2 |
Great Falls |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-05-22 |
|
| 406-604
| 3 |
Great Falls |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-05-22 |
|
| 406-604
| 4 |
Great Falls |
MT |
|
7870 BLACKFOOT COMMUNICATIONS, INC. - MT |
648 |
|
2011-09-11 |
|
| 406-604
| 5 |
Great Falls |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-05-22 |
|
| 406-604
| 6 |
Great Falls |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-05-22 |
|
| 406-604
| 7 |
Great Falls |
MT |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
648 |
|
2016-02-11 |
|
| 406-604
| 8 |
Great Falls |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-01-22 |
|
| 406-604
| 9 |
Great Falls |
MT |
|
073H TELNYX LLC |
648 |
|
2023-08-25 |
|
| 406-605
| A |
Butte |
MT |
MSSLMTMAEMD |
073H TELNYX LLC |
648 |
|
|
|
| 406-605
| 0 |
Butte |
MT |
|
073H TELNYX LLC |
648 |
|
2021-06-09 |
|
| 406-605
| 1 |
Butte |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2023-11-27 |
|
| 406-605
| 2 |
Butte |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2023-11-27 |
|
| 406-605
| 3 |
Butte |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2024-04-06 |
|
| 406-605
| 4 |
Butte |
MT |
|
490J DISH WIRELESS, LLC |
648 |
|
2023-12-18 |
|
| 406-605
| 5 |
Butte |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-10-30 |
|
| 406-605
| 6 |
Butte |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-10-30 |
|
| 406-605
| 7 |
Butte |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-10-30 |
|
| 406-605
| 8 |
Butte |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-10-30 |
|
| 406-605
| 9 |
Butte |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2023-11-27 |
|
| 406-606
| A |
Billings |
MT |
BLNGMTMATMD |
935G TRI TEL, INC. - MT |
650 |
|
|
|
| 406-606
| 0 |
Billings |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2014-11-02 |
|
| 406-606
| 1 |
Billings |
MT |
|
935G TRI TEL, INC. - MT |
650 |
|
2013-01-28 |
|
| 406-606
| 2 |
Billings |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2014-11-14 |
|
| 406-606
| 3 |
Billings |
MT |
|
624H ONVOY SPECTRUM, LLC |
650 |
|
2022-11-12 |
|
| 406-606
| 4 |
Billings |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2019-07-08 |
|
| 406-606
| 5 |
Billings |
MT |
|
624H ONVOY SPECTRUM, LLC |
650 |
|
2022-11-12 |
|
| 406-606
| 6 |
Billings |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2019-07-08 |
|
| 406-606
| 7 |
Billings |
MT |
|
624H ONVOY SPECTRUM, LLC |
650 |
|
2022-11-12 |
|
| 406-606
| 8 |
Billings |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2018-10-09 |
|
| 406-606
| 9 |
Billings |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2018-10-09 |
|
| 406-607
| A |
Kalispell |
MT |
KLSLMTXC4MD |
7870 BLACKFOOT COMMUNICATIONS, INC. - MT |
648 |
|
|
|
| 406-607
| 0 |
Kalispell |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
2016-06-05 |
|
| 406-607
| 1 |
Kalispell |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2021-04-06 |
|
| 406-607
| 2 |
Kalispell |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2022-02-25 |
|
| 406-607
| 3 |
Kalispell |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2022-03-15 |
|
| 406-607
| 4 |
Kalispell |
MT |
|
7870 BLACKFOOT COMMUNICATIONS, INC. - MT |
648 |
|
2013-12-30 |
|
| 406-607
| 5 |
Kalispell |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2020-03-27 |
|
| 406-607
| 6 |
Kalispell |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-06-20 |
|
| 406-607
| 7 |
Kalispell |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2018-10-30 |
|
| 406-607
| 8 |
Kalispell |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-06-20 |
|
| 406-607
| 9 |
Kalispell |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2019-08-02 |
|
| 406-608
| A |
Billings |
MT |
BLNGMTASKMD |
515J IP HORIZON LLC |
650 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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