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 |
| 406-348
| 9 |
Huntley |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-349
| A |
Alta |
MT |
ALTAMTXCRS1 |
2235 BLACKFOOT TEL. COOP., INC. |
648 |
|
|
|
| 406-350
| A |
Lewistown |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-350
| 0 |
Lewistown |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-350
| 1 |
Lewistown |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-350
| 2 |
Lewistown |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-350
| 3 |
Lewistown |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-350
| 4 |
Lewistown |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-15 |
|
| 406-350
| 5 |
Lewistown |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-15 |
|
| 406-350
| 6 |
Lewistown |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-15 |
|
| 406-350
| 7 |
Lewistown |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-15 |
|
| 406-350
| 8 |
Lewistown |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
2026-01-17 |
|
| 406-350
| 9 |
Lewistown |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
2014-11-22 |
|
| 406-351
| A |
Forsyth |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-351
| 0 |
Forsyth |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2010-02-20 |
|
| 406-351
| 1 |
Forsyth |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-351
| 2 |
Forsyth |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-351
| 3 |
Forsyth |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-351
| 4 |
Forsyth |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2017-06-04 |
|
| 406-351
| 5 |
Forsyth |
MT |
|
624H ONVOY SPECTRUM, LLC |
650 |
|
2025-02-17 |
|
| 406-351
| 6 |
Forsyth |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2020-06-09 |
|
| 406-351
| 7 |
Forsyth |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2011-10-21 |
|
| 406-351
| 8 |
Forsyth |
MT |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
650 |
|
2018-05-14 |
|
| 406-351
| 9 |
Forsyth |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-352
| A |
Box Elder |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-353
| A |
Harlem |
MT |
FTBNMTXCDS0 |
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-353
| 0 |
Harlem |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-353
| 1 |
Harlem |
MT |
|
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2021-04-23 |
|
| 406-353
| 2 |
Harlem |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-353
| 3 |
Harlem |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-353
| 4 |
Harlem |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-353
| 5 |
Harlem |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2020-02-24 |
|
| 406-353
| 6 |
Harlem |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2019-01-11 |
|
| 406-353
| 7 |
Harlem |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-353
| 8 |
Harlem |
MT |
|
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-353
| 9 |
Harlem |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2023-07-10 |
|
| 406-354
| A |
Rock Springs |
MT |
WGLNMTXCDS2 |
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-355
| A |
Rudyard |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-356
| A |
Forsyth |
MT |
FRSYMTMARS1 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-356
| 0 |
Forsyth |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2019-09-15 |
|
| 406-356
| 1 |
Forsyth |
MT |
|
073H TELNYX LLC |
650 |
|
2018-07-25 |
|
| 406-356
| 2 |
Forsyth |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-356
| 3 |
Forsyth |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-356
| 4 |
Forsyth |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-356
| 5 |
Forsyth |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2006-05-21 |
|
| 406-356
| 6 |
Forsyth |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2009-02-13 |
|
| 406-356
| 7 |
Forsyth |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-356
| 8 |
Forsyth |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2007-04-14 |
|
| 406-356
| 9 |
Forsyth |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-357
| A |
Chinook |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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