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 |
| 406-804
| 1 |
Gardiner |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2021-07-05 |
|
| 406-804
| 2 |
Gardiner |
MT |
BLNGMTMAMMD |
6010 NEW CINGULAR WIRELESS PCS, LLC |
650 |
|
2023-09-21 |
|
| 406-804
| 3 |
Gardiner |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2021-03-07 |
|
| 406-804
| 4 |
Gardiner |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-10-20 |
|
| 406-804
| 5 |
Gardiner |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-10-20 |
|
| 406-804
| 6 |
Gardiner |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2020-01-05 |
|
| 406-804
| 7 |
Gardiner |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2020-01-05 |
|
| 406-804
| 8 |
Gardiner |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2021-03-07 |
|
| 406-804
| 9 |
Gardiner |
MT |
BLNGMTMAXMD |
6529 T-MOBILE USA, INC. |
650 |
|
2023-08-21 |
|
| 406-807
| A |
East Glacier Park |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-807
| 0 |
East Glacier Park |
MT |
GRFLMTMAHMD |
073H TELNYX LLC |
648 |
|
2021-06-25 |
|
| 406-807
| 1 |
East Glacier Park |
MT |
GRFLMTMAKMD |
624H ONVOY SPECTRUM, LLC |
648 |
|
2024-12-27 |
|
| 406-807
| 7 |
East Glacier Park |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-08-28 |
|
| 406-807
| 8 |
East Glacier Park |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-06-24 |
|
| 406-808
| A |
Havre |
MT |
HLNAMTMAUMD |
508J CENTURYLINK COMMUNICATIONS, LLC |
648 |
|
|
|
| 406-808
| 0 |
Havre |
MT |
GRFLMTMAHMD |
073H TELNYX LLC |
648 |
|
2020-08-13 |
|
| 406-808
| 3 |
Havre |
MT |
MSSLMTMAYMD |
771G TELEPORT COMMUNICATIONS AMERICA MT - LLC |
648 |
|
2016-03-21 |
|
| 406-808
| 4 |
Havre |
MT |
GRFLMTMAKMD |
624H ONVOY SPECTRUM, LLC |
648 |
|
2024-12-27 |
|
| 406-808
| 6 |
Havre |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-04-21 |
|
| 406-808
| 7 |
Havre |
MT |
HLNAMTMAUMD |
508J CENTURYLINK COMMUNICATIONS, LLC |
648 |
|
2014-05-24 |
|
| 406-808
| 8 |
Havre |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2021-04-21 |
|
| 406-808
| 9 |
Havre |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2022-08-12 |
|
| 406-812
| A |
Laurel |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
|
|
| 406-812
| 0 |
Laurel |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2012-02-06 |
|
| 406-812
| 2 |
Laurel |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2014-03-10 |
|
| 406-812
| 3 |
Laurel |
MT |
BLNGMTWEAMD |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
650 |
|
2012-02-01 |
|
| 406-812
| 4 |
Laurel |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-09-15 |
|
| 406-812
| 5 |
Laurel |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2019-10-28 |
|
| 406-812
| 6 |
Laurel |
MT |
BLNGMT93BMD |
321J HD CARRIER LLC |
650 |
|
2020-09-27 |
|
| 406-812
| 7 |
Laurel |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2011-11-28 |
|
| 406-812
| 8 |
Laurel |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2020-01-05 |
|
| 406-812
| 9 |
Laurel |
MT |
BLNGMT93BMD |
321J HD CARRIER LLC |
650 |
|
2020-11-01 |
|
| 406-813
| A |
Belgrade |
MT |
BLNGMTWEUMD |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
650 |
|
|
|
| 406-813
| 0 |
Belgrade |
MT |
BLNGMTMALMD |
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2015-03-21 |
|
| 406-813
| 1 |
Belgrade |
MT |
BLNGMTMALMD |
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2012-09-09 |
|
| 406-813
| 2 |
Belgrade |
MT |
BLNGMTMALMD |
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2021-06-12 |
|
| 406-813
| 3 |
Belgrade |
MT |
BLNGMTWEUMD |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
650 |
|
2011-11-01 |
|
| 406-813
| 4 |
Belgrade |
MT |
BLNGMTWE8MD |
508J CENTURYLINK COMMUNICATIONS, LLC |
650 |
|
2016-08-10 |
|
| 406-813
| 5 |
Belgrade |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2012-12-17 |
|
| 406-813
| 6 |
Belgrade |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2012-12-17 |
|
| 406-813
| 7 |
Belgrade |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2012-12-17 |
|
| 406-813
| 8 |
Belgrade |
MT |
BZMNMTEF2MD |
792K CHARTER IP ENABLED SERVICES, LLC |
650 |
|
2012-03-13 |
|
| 406-813
| 9 |
Belgrade |
MT |
BLNGMT933MD |
073H TELNYX LLC |
650 |
|
2017-03-31 |
|
| 406-815
| A |
Red Lodge |
MT |
BLNGMTMAX5X |
7421 AT&T - LOCAL |
650 |
|
|
|
| 406-815
| 0 |
Red Lodge |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2023-08-20 |
|
| 406-815
| 1 |
Red Lodge |
MT |
BLNGMTWEIMD |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2025-07-23 |
|
| 406-815
| 2 |
Red Lodge |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2026-09-03 |
|
| 406-815
| 3 |
Red Lodge |
MT |
|
6529 T-MOBILE USA, INC. |
650 |
|
2026-10-17 |
|
| 406-815
| 4 |
Red Lodge |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2020-11-10 |
|
| 406-815
| 5 |
Red Lodge |
MT |
BLNGMTAS9MD |
453F ONVOY, LLC - MT |
650 |
|
2020-11-10 |
|
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Last updated: Sat, 10 Oct 2026 15:24:20 UTC
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