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 |
| 406-499
| 3 |
Seeley Lake |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2022-12-13 |
|
| 406-499
| 4 |
Seeley Lake |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2019-07-02 |
|
| 406-499
| 5 |
Seeley Lake |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2023-07-28 |
|
| 406-499
| 6 |
Seeley Lake |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2019-08-10 |
|
| 406-499
| 7 |
Seeley Lake |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2023-12-11 |
|
| 406-499
| 8 |
Seeley Lake |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2017-07-24 |
|
| 406-499
| 9 |
Seeley Lake |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2021-06-12 |
|
| 406-500
| A |
Billings |
MT |
BLNGMT938MD |
965H FRACTEL, LLC |
650 |
|
|
|
| 406-500
| 0 |
Billings |
MT |
BLNGMT938MD |
965H FRACTEL, LLC |
650 |
|
2019-03-30 |
|
| 406-500
| 1 |
Billings |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2021-05-24 |
|
| 406-500
| 2 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-11-18 |
|
| 406-500
| 3 |
Billings |
MT |
BLNGMTWE6MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2019-08-23 |
|
| 406-500
| 4 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-10-28 |
|
| 406-500
| 5 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-10-28 |
|
| 406-500
| 6 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-11-18 |
|
| 406-500
| 7 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-11-18 |
|
| 406-500
| 8 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-11-18 |
|
| 406-500
| 9 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-11-18 |
|
| 406-501
| A |
Whitehall |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-501
| 0 |
Whitehall |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2020-04-04 |
|
| 406-501
| 1 |
Whitehall |
MT |
GRFLMTMAHMD |
073H TELNYX LLC |
648 |
|
2020-08-13 |
|
| 406-501
| 2 |
Whitehall |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2020-10-31 |
|
| 406-501
| 3 |
Whitehall |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2020-11-08 |
|
| 406-501
| 4 |
Whitehall |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2019-10-20 |
|
| 406-501
| 5 |
Whitehall |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2019-10-20 |
|
| 406-501
| 6 |
Whitehall |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2020-01-03 |
|
| 406-501
| 7 |
Whitehall |
MT |
MSSLMTMAYMD |
771G TELEPORT COMMUNICATIONS AMERICA MT - LLC |
648 |
|
2020-08-24 |
|
| 406-501
| 8 |
Whitehall |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-02-11 |
|
| 406-501
| 9 |
Whitehall |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-02-11 |
|
| 406-502
| A |
Helena |
MT |
HLNAMTHH5MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
|
|
| 406-502
| 1 |
Helena |
MT |
HLNAMTHH5MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2012-06-01 |
|
| 406-502
| 2 |
Helena |
MT |
HLNAMTHH5MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2014-04-30 |
|
| 406-502
| 8 |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2023-12-13 |
|
| 406-503
| A |
Billings |
MT |
BLNGMTWELMD |
318J COMCAST IP PHONE, LLC |
650 |
|
|
|
| 406-503
| 0 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2023-08-20 |
|
| 406-503
| 1 |
Billings |
MT |
BLNGMTWELMD |
318J COMCAST IP PHONE, LLC |
650 |
|
2023-06-04 |
|
| 406-503
| 2 |
Billings |
MT |
BLNGMTMAXMD |
6529 T-MOBILE USA, INC. |
650 |
|
2024-01-26 |
|
| 406-503
| 3 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2024-02-09 |
|
| 406-503
| 4 |
Billings |
MT |
BLNGMTMAXMD |
5562 METROPCS, INC. |
650 |
|
2023-09-24 |
|
| 406-503
| 5 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2024-02-09 |
|
| 406-503
| 6 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2024-02-09 |
|
| 406-503
| 7 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2024-02-09 |
|
| 406-503
| 8 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2023-08-20 |
|
| 406-503
| 9 |
Billings |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2023-08-20 |
|
| 406-504
| A |
Fairfield |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
|
|
| 406-504
| 2 |
Fairfield |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2021-05-19 |
|
| 406-505
| A |
Conrad |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-505
| 0 |
Conrad |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
2010-11-28 |
|
| 406-505
| 1 |
Conrad |
MT |
GRFLMTMAHMD |
073H TELNYX LLC |
648 |
|
2020-08-07 |
|
| 406-505
| 2 |
Conrad |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-02-11 |
|
<< 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 >>
Last updated: Sat, 10 Oct 2026 15:24:20 UTC
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