Local Calling Guide
Area code/prefix search
NPA: 406
[Rate centres in NPA 406]
[Dial plan for NPA 406]
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| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-384
| 3 |
Billings |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2023-04-06 |
|
| 406-384
| 4 |
Billings |
MT |
|
4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
650 |
|
|
|
| 406-384
| 5 |
Billings |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2016-07-29 |
|
| 406-384
| 6 |
Billings |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2018-08-20 |
|
| 406-384
| 7 |
Billings |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2018-10-08 |
|
| 406-384
| 8 |
Billings |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2018-04-09 |
|
| 406-384
| 9 |
Billings |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2023-04-06 |
|
| 406-385
| A |
Westby |
MT |
WSBYMTXCRS1 |
2247 NEMONT TEL COOP INC |
650 |
|
|
|
| 406-385
| 2 |
Westby |
MT |
|
2247 NEMONT TEL COOP INC |
650 |
|
|
|
| 406-385
| 7 |
Westby |
MT |
|
443B SAGEBRUSH CELLULAR, INC. |
650 |
|
|
|
| 406-386
| A |
Hopp-Illiad |
MT |
HAVRMTXCDS0 |
2257 TRIANGLE TEL. COOP. ASSN., INC. |
648 |
|
|
|
| 406-387
| A |
Hungry Horse |
MT |
HNHRMTXCRS0 |
2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK |
648 |
|
|
|
| 406-387
| 0 |
Hungry Horse |
MT |
|
073H TELNYX LLC |
648 |
|
2020-08-13 |
|
| 406-387
| 1 |
Hungry Horse |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-07-05 |
|
| 406-387
| 2 |
Hungry Horse |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2023-02-27 |
|
| 406-387
| 3 |
Hungry Horse |
MT |
|
2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK |
648 |
|
|
|
| 406-387
| 4 |
Hungry Horse |
MT |
|
2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK |
648 |
|
|
|
| 406-387
| 5 |
Hungry Horse |
MT |
|
2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK |
648 |
|
|
|
| 406-387
| 6 |
Hungry Horse |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2023-12-16 |
|
| 406-387
| 7 |
Hungry Horse |
MT |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
648 |
|
2014-05-24 |
|
| 406-387
| 8 |
Hungry Horse |
MT |
|
6529 T-MOBILE USA, INC. |
648 |
|
2024-10-04 |
|
| 406-387
| 9 |
Hungry Horse |
MT |
|
2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK |
648 |
|
|
|
| 406-388
| A |
Belgrade |
MT |
BLGRMTMADS0 |
9636 QWEST CORPORATION |
650 |
|
|
|
| 406-389
| A |
Helena |
MT |
HLNAMTMAUMD |
508J CENTURYLINK COMMUNICATIONS, LLC |
648 |
|
|
|
| 406-389
| 0 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-01-22 |
|
| 406-389
| 1 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-01-22 |
|
| 406-389
| 2 |
Helena |
MT |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
648 |
|
2019-10-10 |
|
| 406-389
| 3 |
Helena |
MT |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
648 |
|
2016-02-26 |
|
| 406-389
| 4 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-07-05 |
|
| 406-389
| 5 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-07-05 |
|
| 406-389
| 6 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-07-05 |
|
| 406-389
| 7 |
Helena |
MT |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
648 |
|
2014-01-03 |
|
| 406-389
| 8 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-01-22 |
|
| 406-389
| 9 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-07-05 |
|
| 406-390
| A |
South Havre |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-390
| 0 |
South Havre |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-390
| 1 |
South Havre |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-390
| 2 |
South Havre |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-390
| 3 |
South Havre |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-390
| 4 |
South Havre |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-390
| 5 |
South Havre |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-390
| 6 |
South Havre |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-391
| A |
Cut Bank |
MT |
MSSLMTAG5MD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
|
|
| 406-391
| 0 |
Cut Bank |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
2026-01-17 |
|
| 406-391
| 1 |
Cut Bank |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-10-31 |
|
| 406-391
| 2 |
Cut Bank |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2023-04-02 |
|
| 406-391
| 4 |
Cut Bank |
MT |
|
145J TERRA NOVA TELECOM INC. |
648 |
|
2025-10-09 |
|
| 406-391
| 6 |
Cut Bank |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2024-04-28 |
|
| 406-391
| 7 |
Cut Bank |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2021-03-28 |
|
| 406-392
| A |
North Wolf Point |
MT |
NWPNMTXCRS1 |
2247 NEMONT TEL COOP INC |
650 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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