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 |
| 406-900
| 1 |
Ennis |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2017-11-20 |
|
| 406-900
| 2 |
Ennis |
MT |
|
509K LIVEWIRE TELECOM, LLC |
648 |
|
2025-03-18 |
|
| 406-900
| 4 |
Ennis |
MT |
|
509K LIVEWIRE TELECOM, LLC |
648 |
|
2025-03-18 |
|
| 406-900
| 7 |
Ennis |
MT |
|
509K LIVEWIRE TELECOM, LLC |
648 |
|
2025-03-18 |
|
| 406-900
| 8 |
Ennis |
MT |
|
509K LIVEWIRE TELECOM, LLC |
648 |
|
2025-03-18 |
|
| 406-900
| 9 |
Ennis |
MT |
|
509K LIVEWIRE TELECOM, LLC |
648 |
|
2025-03-18 |
|
| 406-901
| A |
Billings |
MT |
BLNGMTWEDMD |
624H ONVOY SPECTRUM, LLC |
650 |
|
|
|
| 406-901
| 0 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2022-01-14 |
|
| 406-901
| 1 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2022-01-14 |
|
| 406-901
| 2 |
Billings |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2021-07-23 |
|
| 406-901
| 3 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2022-01-14 |
|
| 406-901
| 4 |
Billings |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2024-02-09 |
|
| 406-901
| 5 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2021-11-17 |
|
| 406-901
| 6 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2021-11-17 |
|
| 406-901
| 7 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2021-11-17 |
|
| 406-901
| 8 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2021-11-17 |
|
| 406-901
| 9 |
Billings |
MT |
|
624H ONVOY SPECTRUM, LLC |
650 |
|
2021-06-14 |
|
| 406-902
| A |
Sheridan |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
|
|
| 406-902
| 1 |
Sheridan |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2019-01-18 |
|
| 406-902
| 9 |
Sheridan |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
2022-03-19 |
|
| 406-905
| A |
Joliet |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
|
|
| 406-905
| 0 |
Joliet |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2012-12-17 |
|
| 406-905
| 1 |
Joliet |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2015-04-27 |
|
| 406-905
| 2 |
Joliet |
MT |
|
935G TRI TEL, INC. - MT |
650 |
|
2013-01-28 |
|
| 406-905
| 3 |
Joliet |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2021-07-05 |
|
| 406-905
| 4 |
Joliet |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2019-09-15 |
|
| 406-905
| 5 |
Joliet |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2019-09-15 |
|
| 406-905
| 6 |
Joliet |
MT |
|
624H ONVOY SPECTRUM, LLC |
650 |
|
2024-03-22 |
|
| 406-905
| 7 |
Joliet |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2011-11-28 |
|
| 406-905
| 8 |
Joliet |
MT |
|
073H TELNYX LLC |
650 |
|
2018-07-25 |
|
| 406-905
| 9 |
Joliet |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2022-02-12 |
|
| 406-909
| A |
Columbia Falls |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-909
| 0 |
Columbia Falls |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2018-07-08 |
|
| 406-909
| 1 |
Columbia Falls |
MT |
|
073H TELNYX LLC |
648 |
|
2020-08-07 |
|
| 406-909
| 2 |
Columbia Falls |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-07-05 |
|
| 406-909
| 3 |
Columbia Falls |
MT |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
648 |
|
2019-01-28 |
|
| 406-909
| 4 |
Columbia Falls |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-09-15 |
|
| 406-909
| 5 |
Columbia Falls |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2023-04-24 |
|
| 406-909
| 6 |
Columbia Falls |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-01-03 |
|
| 406-909
| 7 |
Columbia Falls |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-07-18 |
|
| 406-909
| 8 |
Columbia Falls |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-10-28 |
|
| 406-909
| 9 |
Columbia Falls |
MT |
|
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 |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-913
| 9 |
Roundup |
MT |
|
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 |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2025-11-24 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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