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 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-566
| 4 |
Stanford |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-566
| 5 |
Stanford |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-566
| 7 |
Stanford |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2026-06-09 |
|
| 406-566
| 8 |
Stanford |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-566
| 9 |
Stanford |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-567
| A |
Denton |
MT |
FTBNMTXCDS0 |
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-568
| A |
Ryegate |
MT |
WGLNMTXCDS2 |
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-568
| 0 |
Ryegate |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-568
| 1 |
Ryegate |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-568
| 2 |
Ryegate |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-568
| 4 |
Ryegate |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2026-06-16 |
|
| 406-568
| 5 |
Ryegate |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-568
| 9 |
Ryegate |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-569
| A |
West Homesteaders Gap |
MT |
KEENNDXADS0 |
1632 RESERVATION TEL. COOP. |
638 |
|
|
|
| 406-570
| A |
Bozeman |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-571
| A |
Finley Point |
MT |
KLSLMTAZ1MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
|
|
| 406-571
| 1 |
Finley Point |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2012-12-17 |
|
| 406-571
| 2 |
Finley Point |
MT |
KLSLMTAZ1MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2006-04-21 |
|
| 406-571
| 3 |
Finley Point |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2016-02-26 |
|
| 406-571
| 4 |
Finley Point |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2016-02-26 |
|
| 406-571
| 5 |
Finley Point |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-07-05 |
|
| 406-571
| 6 |
Finley Point |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2020-11-08 |
|
| 406-571
| 7 |
Finley Point |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2007-04-14 |
|
| 406-571
| 8 |
Finley Point |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2011-07-11 |
|
| 406-571
| 9 |
Finley Point |
MT |
GRFLMTMAHMD |
073H TELNYX LLC |
648 |
|
2020-08-09 |
|
| 406-572
| A |
Martinsdale |
MT |
WSSPMTXCDS0 |
3310 TRIANGLE TEL. COOP. ASSN., INC. |
650 |
|
|
|
| 406-573
| A |
Browning |
MT |
BRNGMTAQDS0 |
619J SIYEH COMMUNICATIONS |
648 |
|
|
|
| 406-573
| 0 |
Browning |
MT |
BRNGMTAQDS0 |
619J SIYEH COMMUNICATIONS |
648 |
|
2021-02-08 |
|
| 406-573
| 1 |
Browning |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2015-06-30 |
|
| 406-573
| 6 |
Browning |
MT |
GRFLMTMAKMD |
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-11-14 |
|
| 406-573
| 8 |
Browning |
MT |
GRFLMTMAKMD |
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-07-18 |
|
| 406-574
| A |
Silvertip |
MT |
POWLWYMARS1 |
9636 QWEST CORPORATION |
654 |
|
|
|
| 406-574
| 0 |
Silvertip |
MT |
CHYNWYRF1MD |
073H TELNYX LLC |
654 |
|
2018-07-25 |
|
| 406-574
| 1 |
Silvertip |
MT |
POWLWYMARS1 |
9636 QWEST CORPORATION |
654 |
|
|
|
| 406-574
| 2 |
Silvertip |
MT |
CHYNWYMAX2X |
453F ONVOY, LLC - MT |
654 |
|
2021-07-05 |
|
| 406-574
| 3 |
Silvertip |
MT |
POWLWYMARS1 |
9636 QWEST CORPORATION |
654 |
|
|
|
| 406-574
| 4 |
Silvertip |
MT |
CHYNWYMAEMD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
654 |
|
2023-03-02 |
|
| 406-574
| 5 |
Silvertip |
MT |
CHYNWYMAXKX |
478J NUSO, LLC |
654 |
|
2023-12-09 |
|
| 406-574
| 6 |
Silvertip |
MT |
CHYNWYMAXKX |
478J NUSO, LLC |
654 |
|
2023-12-09 |
|
| 406-574
| 7 |
Silvertip |
MT |
CHYNWYMAXAX |
508J CENTURYLINK COMMUNICATIONS, LLC |
654 |
|
2015-03-18 |
|
| 406-574
| 8 |
Silvertip |
MT |
CHYNWYMAXKX |
478J NUSO, LLC |
654 |
|
2020-10-11 |
|
| 406-575
| A |
North Ryegate |
MT |
WGLNMTXCDS2 |
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-576
| A |
Conrad |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-576
| 1 |
Conrad |
MT |
HLNAMTMAMMD |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
648 |
|
2017-08-15 |
|
| 406-576
| 9 |
Conrad |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
2024-12-23 |
|
| 406-577
| A |
Bozeman |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
|
|
| 406-577
| 0 |
Bozeman |
MT |
BLNGMT93DS0 |
588H AIRUS, INC. - MT |
650 |
|
2018-02-26 |
|
| 406-577
| 1 |
Bozeman |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
|
|
| 406-577
| 2 |
Bozeman |
MT |
BZMNMTEF2MD |
792K CHARTER IP ENABLED SERVICES, LLC |
650 |
|
2011-07-28 |
|
| 406-577
| 3 |
Bozeman |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2015-08-13 |
|
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Last updated: Sun, 17 May 2026 03:26:51 UTC
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