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 |
| 406-426
| 8 |
Red Lodge |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2011-04-21 |
|
| 406-426
| 9 |
Red Lodge |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2016-08-21 |
|
| 406-427
| A |
South Broadus |
MT |
BRDSMTXBRS2 |
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-428
| A |
Grass Range |
MT |
RNDPMTXCDS0 |
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-428
| 2 |
Grass Range |
MT |
|
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-428
| 8 |
Grass Range |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2018-12-17 |
|
| 406-429
| A |
Winnett |
MT |
RNDPMTXCDS0 |
2246 MID-RIVERS TEL. COOP., INC. |
650 |
|
|
|
| 406-430
| A |
Helena |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-430
| 0 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-05-17 |
|
| 406-430
| 1 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-430
| 2 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-10-28 |
|
| 406-430
| 3 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-11-18 |
|
| 406-430
| 4 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-09-15 |
|
| 406-430
| 5 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-11-18 |
|
| 406-430
| 6 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-09-15 |
|
| 406-430
| 7 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-11-18 |
|
| 406-430
| 8 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-11-18 |
|
| 406-430
| 9 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-11-30 |
|
| 406-431
| A |
Helena |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-432
| A |
Devon |
MT |
SNBRMTXCDS0 |
2248 NORTHERN TEL. COOP., INC. |
648 |
|
|
|
| 406-433
| A |
Sidney |
MT |
SDNYMTAORS0 |
7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. |
650 |
|
|
|
| 406-434
| A |
Shelby |
MT |
SHLBMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-434
| 1 |
Shelby |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2024-12-27 |
|
| 406-434
| 2 |
Shelby |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-434
| 3 |
Shelby |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-434
| 4 |
Shelby |
MT |
|
145J TERRA NOVA TELECOM INC. |
648 |
|
2025-10-09 |
|
| 406-434
| 5 |
Shelby |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-434
| 6 |
Shelby |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2005-02-21 |
|
| 406-434
| 7 |
Shelby |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-434
| 8 |
Shelby |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2007-03-09 |
|
| 406-434
| 9 |
Shelby |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-435
| A |
Billings |
MT |
|
520K TDS METROCOM, LLC |
650 |
|
|
|
| 406-435
| 0 |
Billings |
MT |
|
520K TDS METROCOM, LLC |
650 |
|
2025-12-06 |
|
| 406-435
| 1 |
Billings |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 2 |
Billings |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 3 |
Billings |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 4 |
Billings |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 5 |
Billings |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 6 |
Billings |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 7 |
Billings |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 8 |
Billings |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-435
| 9 |
Billings |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2021-04-22 |
|
| 406-436
| A |
Broadus |
MT |
BRDSMTXBRS2 |
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-436
| 0 |
Broadus |
MT |
|
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-436
| 2 |
Broadus |
MT |
|
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-436
| 5 |
Broadus |
MT |
|
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-436
| 9 |
Broadus |
MT |
|
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-437
| A |
Helena |
MT |
HLNAMTMAMMD |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
648 |
|
|
|
| 406-437
| 0 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2023-09-28 |
|
| 406-437
| 1 |
Helena |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2009-04-09 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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