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 |
| 406-628
| 0 |
Laurel |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2004-11-13 |
|
| 406-628
| 1 |
Laurel |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-628
| 2 |
Laurel |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-628
| 3 |
Laurel |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-628
| 4 |
Laurel |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-628
| 5 |
Laurel |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-628
| 6 |
Laurel |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-628
| 7 |
Laurel |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-628
| 8 |
Laurel |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-628
| 9 |
Laurel |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-629
| A |
Hardin |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
|
|
| 406-629
| 0 |
Hardin |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-629
| 1 |
Hardin |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2012-12-17 |
|
| 406-629
| 2 |
Hardin |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2012-12-17 |
|
| 406-629
| 3 |
Hardin |
MT |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
650 |
|
2010-10-01 |
|
| 406-629
| 4 |
Hardin |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2019-09-15 |
|
| 406-629
| 5 |
Hardin |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2019-09-15 |
|
| 406-629
| 6 |
Hardin |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2023-04-18 |
|
| 406-629
| 7 |
Hardin |
MT |
|
624H ONVOY SPECTRUM, LLC |
650 |
|
2024-03-22 |
|
| 406-629
| 8 |
Hardin |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2023-11-22 |
|
| 406-630
| A |
Sidney |
MT |
BLNGMTWE6MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
|
|
| 406-630
| 0 |
Sidney |
MT |
|
073H TELNYX LLC |
650 |
|
2017-03-31 |
|
| 406-630
| 1 |
Sidney |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2016-09-10 |
|
| 406-630
| 2 |
Sidney |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2013-04-30 |
|
| 406-630
| 3 |
Sidney |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2021-12-04 |
|
| 406-630
| 4 |
Sidney |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2005-04-09 |
|
| 406-630
| 5 |
Sidney |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2006-10-20 |
|
| 406-630
| 6 |
Sidney |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2019-09-15 |
|
| 406-630
| 7 |
Sidney |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2011-10-24 |
|
| 406-630
| 8 |
Sidney |
MT |
|
588H AIRUS, INC. - MT |
650 |
|
2018-03-02 |
|
| 406-630
| 9 |
Sidney |
MT |
|
588H AIRUS, INC. - MT |
650 |
|
2020-03-27 |
|
| 406-631
| A |
Elmo |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-631
| 0 |
Elmo |
MT |
|
073H TELNYX LLC |
648 |
|
2020-08-09 |
|
| 406-631
| 1 |
Elmo |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-10 |
|
| 406-631
| 2 |
Elmo |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-10 |
|
| 406-631
| 3 |
Elmo |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-10 |
|
| 406-631
| 4 |
Elmo |
MT |
|
986F WESTERN MONTANA COMMUNITYTEL INC. - MT |
648 |
|
2013-07-20 |
|
| 406-631
| 5 |
Elmo |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-03-07 |
|
| 406-631
| 6 |
Elmo |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-11-08 |
|
| 406-631
| 7 |
Elmo |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2007-09-21 |
|
| 406-631
| 8 |
Elmo |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2011-04-06 |
|
| 406-631
| 9 |
Elmo |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-03-07 |
|
| 406-632
| A |
Harlowton |
MT |
WSSPMTXCDS0 |
3310 TRIANGLE TEL. COOP. ASSN., INC. |
650 |
|
|
|
| 406-632
| 1 |
Harlowton |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
650 |
|
|
|
| 406-632
| 2 |
Harlowton |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
650 |
|
|
|
| 406-632
| 3 |
Harlowton |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
650 |
|
|
|
| 406-632
| 4 |
Harlowton |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
650 |
|
|
|
| 406-632
| 5 |
Harlowton |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
650 |
|
|
|
| 406-632
| 6 |
Harlowton |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
650 |
|
|
|
| 406-632
| 7 |
Harlowton |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
650 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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