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 |
| 406-276
| 8 |
Lima |
MT |
|
2255 3 RIVERS TEL. COOP., INC. |
648 |
|
|
|
| 406-276
| 9 |
Lima |
MT |
|
2255 3 RIVERS TEL. COOP., INC. |
648 |
|
|
|
| 406-277
| A |
Belt |
MT |
FRFDMTXCDS1 |
2255 3 RIVERS TEL. COOP., INC. |
648 |
|
|
|
| 406-278
| A |
Conrad |
MT |
CNRDMTMARS1 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-278
| 0 |
Conrad |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-278
| 1 |
Conrad |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2007-03-19 |
|
| 406-278
| 2 |
Conrad |
MT |
|
145J TERRA NOVA TELECOM INC. |
648 |
|
2025-10-09 |
|
| 406-278
| 3 |
Conrad |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-278
| 4 |
Conrad |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-278
| 5 |
Conrad |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-278
| 6 |
Conrad |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2006-07-10 |
|
| 406-278
| 7 |
Conrad |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-278
| 8 |
Conrad |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2010-08-30 |
|
| 406-278
| 9 |
Conrad |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-279
| A |
Valier |
MT |
FRFDMTXCDS1 |
2255 3 RIVERS TEL. COOP., INC. |
648 |
|
|
|
| 406-280
| A |
St Regis |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-280
| 0 |
St Regis |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-281
| A |
Billings |
MT |
BLNGMTWEBMD |
771G TELEPORT COMMUNICATIONS AMERICA MT - LLC |
650 |
|
|
|
| 406-281
| 0 |
Billings |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2005-03-03 |
|
| 406-281
| 1 |
Billings |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2005-06-20 |
|
| 406-281
| 2 |
Billings |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2005-09-26 |
|
| 406-281
| 3 |
Billings |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2006-03-20 |
|
| 406-281
| 4 |
Billings |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2006-06-25 |
|
| 406-281
| 5 |
Billings |
MT |
|
792K CHARTER IP ENABLED SERVICES, LLC |
650 |
|
2009-03-27 |
|
| 406-281
| 6 |
Billings |
MT |
|
792K CHARTER IP ENABLED SERVICES, LLC |
650 |
|
2009-03-27 |
|
| 406-281
| 7 |
Billings |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2008-03-22 |
|
| 406-281
| 8 |
Billings |
MT |
|
792K CHARTER IP ENABLED SERVICES, LLC |
650 |
|
2009-03-27 |
|
| 406-281
| 9 |
Billings |
MT |
|
771G TELEPORT COMMUNICATIONS AMERICA MT - LLC |
650 |
|
|
|
| 406-282
| A |
Manhattan |
MT |
AMSTMTMARS1 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-282
| 0 |
Manhattan |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2004-11-13 |
|
| 406-282
| 1 |
Manhattan |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2009-02-13 |
|
| 406-282
| 2 |
Manhattan |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2020-06-05 |
|
| 406-282
| 3 |
Manhattan |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2010-02-20 |
|
| 406-282
| 4 |
Manhattan |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2011-06-19 |
|
| 406-282
| 5 |
Manhattan |
MT |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
650 |
|
2016-08-11 |
|
| 406-282
| 6 |
Manhattan |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-282
| 7 |
Manhattan |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-282
| 8 |
Manhattan |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2017-05-29 |
|
| 406-282
| 9 |
Manhattan |
MT |
|
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-283
| A |
Libby |
MT |
LBBYMTXCDS0 |
4322 ZIPLY FIBER MONTANA, LLC DBA ZIPLY FIBER |
960 |
|
|
|
| 406-283
| 0 |
Libby |
MT |
|
453F ONVOY, LLC - MT |
960 |
|
2020-06-05 |
|
| 406-283
| 1 |
Libby |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
960 |
|
|
|
| 406-283
| 2 |
Libby |
MT |
|
4322 ZIPLY FIBER MONTANA, LLC DBA ZIPLY FIBER |
960 |
|
|
|
| 406-283
| 3 |
Libby |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
960 |
|
2017-04-01 |
|
| 406-283
| 4 |
Libby |
MT |
|
453F ONVOY, LLC - MT |
960 |
|
2020-02-23 |
|
| 406-283
| 5 |
Libby |
MT |
|
453F ONVOY, LLC - MT |
960 |
|
2021-08-28 |
|
| 406-283
| 6 |
Libby |
MT |
|
4322 ZIPLY FIBER MONTANA, LLC DBA ZIPLY FIBER |
960 |
|
|
|
| 406-283
| 7 |
Libby |
MT |
|
4322 ZIPLY FIBER MONTANA, LLC DBA ZIPLY FIBER |
960 |
|
|
|
| 406-283
| 8 |
Libby |
MT |
|
453F ONVOY, LLC - MT |
960 |
|
2022-01-02 |
|
| 406-283
| 9 |
Libby |
MT |
|
771G TELEPORT COMMUNICATIONS AMERICA MT - LLC |
960 |
|
2020-07-13 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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