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 |
| 406-558
| 2 |
Helena |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2014-10-24 |
|
| 406-558
| 3 |
Helena |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2021-10-02 |
|
| 406-558
| 4 |
Helena |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
|
|
| 406-558
| 5 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2024-05-05 |
|
| 406-558
| 6 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2024-05-05 |
|
| 406-558
| 7 |
Helena |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2024-05-05 |
|
| 406-558
| 8 |
Helena |
MT |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
648 |
|
2025-11-23 |
|
| 406-558
| 9 |
Helena |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2004-09-27 |
|
| 406-559
| A |
Anaconda |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-559
| 0 |
Anaconda |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-559
| 1 |
Anaconda |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
2025-05-30 |
|
| 406-559
| 2 |
Anaconda |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2011-01-16 |
|
| 406-559
| 3 |
Anaconda |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-17 |
|
| 406-559
| 4 |
Anaconda |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-09-15 |
|
| 406-559
| 5 |
Anaconda |
MT |
|
145J TERRA NOVA TELECOM INC. |
648 |
|
2025-10-06 |
|
| 406-559
| 6 |
Anaconda |
MT |
|
6010 NEW CINGULAR WIRELESS PCS, LLC |
648 |
|
2010-11-05 |
|
| 406-559
| 7 |
Anaconda |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2016-06-18 |
|
| 406-559
| 8 |
Anaconda |
MT |
|
073H TELNYX LLC |
648 |
|
2020-08-07 |
|
| 406-559
| 9 |
Anaconda |
MT |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-10-30 |
|
| 406-560
| A |
Anaconda |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-560
| 0 |
Anaconda |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-560
| 1 |
Anaconda |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-560
| 2 |
Anaconda |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-560
| 3 |
Anaconda |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-560
| 4 |
Anaconda |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-560
| 5 |
Anaconda |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-560
| 6 |
Anaconda |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-560
| 7 |
Anaconda |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-560
| 8 |
Anaconda |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-561
| A |
Billings |
MT |
BLNGMTMAXMD |
6529 T-MOBILE USA, INC. |
650 |
|
|
|
| 406-561
| 0 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2020-02-02 |
|
| 406-561
| 1 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2020-02-02 |
|
| 406-561
| 2 |
Billings |
MT |
|
5562 METROPCS, INC. |
650 |
|
2018-08-04 |
|
| 406-561
| 3 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2019-04-28 |
|
| 406-561
| 4 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2019-04-28 |
|
| 406-561
| 5 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2018-11-25 |
|
| 406-561
| 6 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2018-05-10 |
|
| 406-561
| 7 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2018-05-10 |
|
| 406-561
| 8 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2018-03-22 |
|
| 406-561
| 9 |
Billings |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2017-11-01 |
|
| 406-562
| A |
Augusta |
MT |
FRFDMTXCDS1 |
2255 3 RIVERS TEL. COOP., INC. |
648 |
|
|
|
| 406-563
| A |
Anaconda |
MT |
ANCNMTMARS1 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-563
| 0 |
Anaconda |
MT |
|
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2006-04-09 |
|
| 406-563
| 2 |
Anaconda |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-563
| 3 |
Anaconda |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-563
| 4 |
Anaconda |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-563
| 5 |
Anaconda |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-563
| 6 |
Anaconda |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-563
| 7 |
Anaconda |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-563
| 8 |
Anaconda |
MT |
|
9636 QWEST CORPORATION |
648 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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