Local Calling Guide
Area code/prefix search
Helena, MT
<< 1 2 3
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-558
| A |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
648 |
|
|
|
| 406-558
| 0 |
|
073H TELNYX LLC |
648 |
|
2024-10-27 |
|
| 406-558
| 2 |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2014-10-24 |
|
| 406-558
| 3 |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2021-10-02 |
|
| 406-558
| 4 |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
|
|
| 406-558
| 5 |
|
453F ONVOY, LLC - MT |
648 |
|
2024-05-05 |
|
| 406-558
| 6 |
|
453F ONVOY, LLC - MT |
648 |
|
2024-05-05 |
|
| 406-558
| 7 |
|
453F ONVOY, LLC - MT |
648 |
|
2024-05-05 |
|
| 406-558
| 8 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
648 |
|
2025-11-23 |
|
| 406-558
| 9 |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2004-09-27 |
|
| 406-594
| A |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-603
| A |
HLNAMTHO3MD |
7870 BLACKFOOT COMMUNICATIONS, INC. - MT |
648 |
|
|
|
| 406-603
| 0 |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2014-07-12 |
|
| 406-603
| 4 |
|
7870 BLACKFOOT COMMUNICATIONS, INC. - MT |
648 |
|
2013-12-30 |
|
| 406-634
| A |
|
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-634
| 3 |
|
453F ONVOY, LLC - MT |
648 |
|
2020-09-06 |
|
| 406-634
| 4 |
|
453F ONVOY, LLC - MT |
648 |
|
2020-09-06 |
|
| 406-634
| 5 |
|
490J DISH WIRELESS, LLC |
648 |
|
2023-08-21 |
|
| 406-841
| A |
HLNAMTMADS0 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-841
| 0 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-841
| 1 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-841
| 2 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-841
| 3 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-841
| 4 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-841
| 5 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-841
| 7 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-841
| 8 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-841
| 9 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-916
| A |
HLNAMTMAWMD |
6529 T-MOBILE USA, INC. |
648 |
|
|
|
| 406-916
| 0 |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2025-11-24 |
|
| 406-916
| 1 |
|
6529 T-MOBILE USA, INC. |
648 |
|
2022-08-27 |
|
| 406-916
| 2 |
|
6529 T-MOBILE USA, INC. |
648 |
|
2021-03-12 |
|
| 406-916
| 3 |
|
453F ONVOY, LLC - MT |
648 |
|
2020-11-30 |
|
| 406-916
| 4 |
|
453F ONVOY, LLC - MT |
648 |
|
2020-11-30 |
|
| 406-916
| 5 |
|
453F ONVOY, LLC - MT |
648 |
|
2020-11-30 |
|
| 406-916
| 6 |
|
6529 T-MOBILE USA, INC. |
648 |
|
2020-07-30 |
|
| 406-916
| 7 |
|
6529 T-MOBILE USA, INC. |
648 |
|
2019-03-18 |
|
| 406-916
| 8 |
|
6529 T-MOBILE USA, INC. |
648 |
|
2017-05-25 |
|
| 406-916
| 9 |
|
6529 T-MOBILE USA, INC. |
648 |
|
2017-05-25 |
|
| 406-933
| A |
CLNCMTMARS1 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-933
| 3 |
|
145J TERRA NOVA TELECOM INC. |
648 |
|
2025-10-06 |
|
| 406-933
| 5 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-933
| 8 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-933
| 9 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-992
| A |
|
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-992
| 0 |
|
453F ONVOY, LLC - MT |
648 |
|
2025-05-17 |
|
| 406-996
| A |
HLNAMTHH5MD |
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
|
|
| 406-996
| 1 |
|
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2011-03-10 |
|
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Last updated: Tue, 13 Jan 2026 21:50:02 UTC
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