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 |
| 406-981
| 1 |
South Miles City |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2018-12-17 |
|
| 406-981
| 2 |
South Miles City |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2026-03-01 |
|
| 406-982
| A |
Yellow Bay |
MT |
YLBYMTXCRS0 |
2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK |
648 |
|
|
|
| 406-982
| 0 |
Yellow Bay |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-07-08 |
|
| 406-982
| 1 |
Yellow Bay |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2023-03-02 |
|
| 406-982
| 2 |
Yellow Bay |
MT |
YLBYMTXCRS0 |
2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK |
648 |
|
|
|
| 406-982
| 3 |
Yellow Bay |
MT |
YLBYMTXCRS0 |
2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK |
648 |
|
|
|
| 406-982
| 7 |
Yellow Bay |
MT |
HLNAMTMAUMD |
508J CENTURYLINK COMMUNICATIONS, LLC |
648 |
|
2014-05-31 |
|
| 406-982
| 8 |
Yellow Bay |
MT |
GRFLMTMAHMD |
073H TELNYX LLC |
648 |
|
2025-02-03 |
|
| 406-982
| 9 |
Yellow Bay |
MT |
|
145J TERRA NOVA TELECOM INC. |
648 |
|
2025-10-09 |
|
| 406-983
| A |
Ashland |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-983
| 0 |
Ashland |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-983
| 1 |
Ashland |
MT |
BLNGMTWE6MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2018-08-27 |
|
| 406-983
| 2 |
Ashland |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2018-12-17 |
|
| 406-983
| 9 |
Ashland |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-984
| A |
Birney |
MT |
BRNYMTXCRS1 |
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-984
| 6 |
Birney |
MT |
BRNYMTXCRS1 |
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-987
| A |
Glendive |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-987
| 0 |
Glendive |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-987
| 1 |
Glendive |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-987
| 2 |
Glendive |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2020-01-05 |
|
| 406-987
| 3 |
Glendive |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2020-01-05 |
|
| 406-987
| 4 |
Glendive |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-09-15 |
|
| 406-987
| 5 |
Glendive |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-09-15 |
|
| 406-987
| 6 |
Glendive |
MT |
BLNGMTWE8MD |
508J CENTURYLINK COMMUNICATIONS, LLC |
650 |
|
2016-08-11 |
|
| 406-987
| 7 |
Glendive |
MT |
BLNGMTMALMD |
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2026-03-15 |
|
| 406-987
| 8 |
Glendive |
MT |
BLNGMTWEDMD |
624H ONVOY SPECTRUM, LLC |
650 |
|
2025-01-16 |
|
| 406-987
| 9 |
Glendive |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
|
|
| 406-988
| A |
Dillon |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
|
|
| 406-988
| 0 |
Dillon |
MT |
HLNAMTHH5MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2006-03-24 |
|
| 406-988
| 4 |
Dillon |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2005-03-02 |
|
| 406-988
| 6 |
Dillon |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-03-07 |
|
| 406-988
| 7 |
Dillon |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2006-10-19 |
|
| 406-988
| 8 |
Dillon |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-03-07 |
|
| 406-988
| 9 |
Dillon |
MT |
GRFLMTMAYMD |
145J TERRA NOVA TELECOM INC. |
648 |
|
2025-10-11 |
|
| 406-989
| A |
West Glendive |
MT |
BLNGMTMAMMD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
|
|
| 406-989
| 0 |
West Glendive |
MT |
BLNGMTMAMMD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
|
|
| 406-989
| 1 |
West Glendive |
MT |
BLNGMTMAMMD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
|
|
| 406-989
| 9 |
West Glendive |
MT |
|
145J TERRA NOVA TELECOM INC. |
650 |
|
2025-06-07 |
|
| 406-990
| A |
Lame Deer |
MT |
BLNGMTMAMMD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
|
|
| 406-990
| 0 |
Lame Deer |
MT |
|
145J TERRA NOVA TELECOM INC. |
650 |
|
2025-10-06 |
|
| 406-990
| 8 |
Lame Deer |
MT |
BLNGMTMAMMD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2021-08-27 |
|
| 406-991
| A |
Marion |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-991
| 0 |
Marion |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2012-12-14 |
|
| 406-991
| 1 |
Marion |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2012-12-14 |
|
| 406-991
| 2 |
Marion |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2012-12-14 |
|
| 406-991
| 3 |
Marion |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2019-10-28 |
|
| 406-991
| 4 |
Marion |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2019-09-15 |
|
| 406-991
| 6 |
Marion |
MT |
MSSLMTMACMD |
6529 T-MOBILE USA, INC. |
648 |
|
2024-06-09 |
|
| 406-991
| 7 |
Marion |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2007-12-06 |
|
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Last updated: Thu, 16 Jul 2026 02:21:55 UTC
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