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 99 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-371
| 2 |
Billings |
MT |
BLNGMTWEAMD |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
650 |
|
2017-08-20 |
|
| 406-371
| 3 |
Billings |
MT |
BLNGMTMAMMD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2006-06-25 |
|
| 406-371
| 4 |
Billings |
MT |
BLNGMTWEAMD |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
650 |
|
2013-08-30 |
|
| 406-371
| 5 |
Billings |
MT |
BLNGMT93HMD |
792K CHARTER IP ENABLED SERVICES, LLC |
650 |
|
2006-12-08 |
|
| 406-371
| 6 |
Billings |
MT |
BLNGMTMAMMD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2007-03-18 |
|
| 406-371
| 7 |
Billings |
MT |
BLNGMT93HMD |
792K CHARTER IP ENABLED SERVICES, LLC |
650 |
|
2014-04-30 |
|
| 406-371
| 8 |
Billings |
MT |
BLNGMTMADS1 |
9636 QWEST CORPORATION |
650 |
|
2006-07-10 |
|
| 406-371
| 9 |
Billings |
MT |
BLNGMTWEAMD |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
650 |
|
2004-09-19 |
|
| 406-372
| A |
Kremlin |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-373
| A |
Billings |
MT |
SHPHMTMARS1 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-373
| 0 |
Billings |
MT |
SHPHMTMARS1 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-373
| 1 |
Billings |
MT |
SHPHMTMARS1 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-373
| 2 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2026-08-25 |
|
| 406-373
| 3 |
Billings |
MT |
BLNGMTWEDS0 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-373
| 4 |
Billings |
MT |
BLNGMTMAXMD |
6529 T-MOBILE USA, INC. |
650 |
|
2024-10-11 |
|
| 406-373
| 5 |
Billings |
MT |
SHPHMTMARS1 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-373
| 6 |
Billings |
MT |
SHPHMTMARS1 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-373
| 7 |
Billings |
MT |
BLNGMTMADS1 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-373
| 8 |
Billings |
MT |
BLNGMTWEDS0 |
9636 QWEST CORPORATION |
650 |
|
2004-11-22 |
|
| 406-373
| 9 |
Billings |
MT |
SHPHMTMARS1 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-374
| A |
Moore |
MT |
FTBNMTXCDS0 |
3310 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-375
| A |
Hamilton |
MT |
HMTNMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-375
| 0 |
Hamilton |
MT |
HMTNMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-375
| 1 |
Hamilton |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
2025-06-30 |
|
| 406-375
| 2 |
Hamilton |
MT |
HMTNMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-375
| 3 |
Hamilton |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2022-09-19 |
|
| 406-375
| 4 |
Hamilton |
MT |
HMTNMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-375
| 5 |
Hamilton |
MT |
MSSLMTEH4MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2006-05-17 |
|
| 406-375
| 6 |
Hamilton |
MT |
HMTNMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-375
| 7 |
Hamilton |
MT |
HMTNMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-375
| 8 |
Hamilton |
MT |
HMTNMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-375
| 9 |
Hamilton |
MT |
HMTNMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-376
| A |
Gildford |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-377
| A |
Glendive |
MT |
GLNDMTAJRS0 |
7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. |
650 |
|
|
|
| 406-378
| A |
Big Sandy |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-378
| 0 |
Big Sandy |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-378
| 1 |
Big Sandy |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-378
| 2 |
Big Sandy |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-378
| 3 |
Big Sandy |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-378
| 4 |
Big Sandy |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-378
| 5 |
Big Sandy |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-378
| 6 |
Big Sandy |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-378
| 7 |
Big Sandy |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-378
| 8 |
Big Sandy |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2024-10-17 |
|
| 406-378
| 9 |
Big Sandy |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-379
| A |
Turner |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-380
| A |
Lewistown |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-380
| 0 |
Lewistown |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-380
| 1 |
Lewistown |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2021-04-22 |
|
| 406-380
| 2 |
Lewistown |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2011-08-08 |
|
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Last updated: Sat, 10 Oct 2026 15:24:20 UTC
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