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 |
| 406-632
| 8 |
Harlowton |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2019-01-11 |
|
| 406-632
| 9 |
Harlowton |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
650 |
|
|
|
| 406-633
| A |
Laurel |
MT |
PRCYMTMARS1 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-633
| 0 |
Laurel |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2009-05-22 |
|
| 406-633
| 1 |
Laurel |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2009-11-13 |
|
| 406-633
| 2 |
Laurel |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-633
| 3 |
Laurel |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2010-06-21 |
|
| 406-633
| 4 |
Laurel |
MT |
|
792K CHARTER IP ENABLED SERVICES, LLC |
650 |
|
2011-03-27 |
|
| 406-633
| 5 |
Laurel |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2011-06-03 |
|
| 406-633
| 7 |
Laurel |
MT |
|
935G TRI TEL, INC. - MT |
650 |
|
2013-01-28 |
|
| 406-633
| 8 |
Laurel |
MT |
|
145J TERRA NOVA TELECOM INC. |
650 |
|
2024-12-05 |
|
| 406-633
| 9 |
Laurel |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-634
| A |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-634
| 3 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-09-06 |
|
| 406-634
| 4 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-09-06 |
|
| 406-634
| 5 |
Helena |
MT |
|
490J DISH WIRELESS, LLC |
648 |
|
2023-08-21 |
|
| 406-635
| A |
Terry |
MT |
WGLNMTXCDS2 |
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-635
| 0 |
Terry |
MT |
|
073H TELNYX LLC |
650 |
|
2018-07-25 |
|
| 406-635
| 1 |
Terry |
MT |
|
588H AIRUS, INC. - MT |
650 |
|
2021-02-18 |
|
| 406-635
| 2 |
Terry |
MT |
|
145J TERRA NOVA TELECOM INC. |
650 |
|
2021-11-04 |
|
| 406-635
| 3 |
Terry |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2021-07-08 |
|
| 406-635
| 4 |
Terry |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-635
| 5 |
Terry |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-635
| 6 |
Terry |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2018-12-17 |
|
| 406-635
| 7 |
Terry |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2021-03-07 |
|
| 406-635
| 8 |
Terry |
MT |
|
588H AIRUS, INC. - MT |
650 |
|
2018-03-02 |
|
| 406-635
| 9 |
Terry |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-636
| A |
Lavina |
MT |
RNDPMTXCDS0 |
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-637
| A |
Terry |
MT |
TRRYMTMARS1 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-637
| 3 |
Terry |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2012-02-10 |
|
| 406-637
| 4 |
Terry |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2012-12-17 |
|
| 406-637
| 5 |
Terry |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-637
| 6 |
Terry |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2007-03-19 |
|
| 406-637
| 7 |
Terry |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2011-10-24 |
|
| 406-637
| 8 |
Terry |
MT |
|
588H AIRUS, INC. - MT |
650 |
|
2019-05-11 |
|
| 406-638
| A |
Hardin |
MT |
CWAGMTXCDS0 |
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-638
| 0 |
Hardin |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2025-10-10 |
|
| 406-638
| 1 |
Hardin |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2014-09-05 |
|
| 406-638
| 2 |
Hardin |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-638
| 3 |
Hardin |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-638
| 4 |
Hardin |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-638
| 5 |
Hardin |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2021-07-05 |
|
| 406-638
| 6 |
Hardin |
MT |
|
771G TELEPORT COMMUNICATIONS AMERICA MT - LLC |
650 |
|
2020-08-07 |
|
| 406-638
| 7 |
Hardin |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-638
| 8 |
Hardin |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2021-07-05 |
|
| 406-638
| 9 |
Hardin |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-639
| A |
Lodge Grass |
MT |
LDGSMTXCRS1 |
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-640
| A |
West Yellowstone |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-640
| 0 |
West Yellowstone |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-640
| 1 |
West Yellowstone |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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