Local Calling Guide
Area code/prefix search
Boulder, MT
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-225
| A |
BLDRMTMARS1 |
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-225
| 0 |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-10 |
|
| 406-225
| 1 |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-11-14 |
|
| 406-225
| 3 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-225
| 4 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-225
| 5 |
|
145J TERRA NOVA TELECOM INC. |
648 |
|
2025-10-09 |
|
| 406-225
| 6 |
|
453F ONVOY, LLC - MT |
648 |
|
2022-10-29 |
|
| 406-225
| 7 |
|
453F ONVOY, LLC - MT |
648 |
|
2007-03-19 |
|
| 406-225
| 8 |
|
453F ONVOY, LLC - MT |
648 |
|
2022-10-29 |
|
| 406-225
| 9 |
|
9636 QWEST CORPORATION |
648 |
|
|
|
| 406-313
| A |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-313
| 0 |
|
453F ONVOY, LLC - MT |
648 |
|
2013-01-17 |
|
| 406-313
| 1 |
|
792K CHARTER IP ENABLED SERVICES, LLC |
648 |
|
2019-06-14 |
|
| 406-313
| 2 |
|
453F ONVOY, LLC - MT |
648 |
|
2020-04-04 |
|
| 406-313
| 3 |
|
453F ONVOY, LLC - MT |
648 |
|
2019-10-28 |
|
| 406-313
| 4 |
|
453F ONVOY, LLC - MT |
648 |
|
2020-01-03 |
|
| 406-313
| 5 |
|
453F ONVOY, LLC - MT |
648 |
|
2020-02-23 |
|
| 406-313
| 6 |
|
453F ONVOY, LLC - MT |
648 |
|
2013-01-17 |
|
| 406-313
| 7 |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
648 |
|
2014-05-24 |
|
| 406-313
| 8 |
|
453F ONVOY, LLC - MT |
648 |
|
2020-04-04 |
|
| 406-313
| 9 |
|
073H TELNYX LLC |
648 |
|
2020-08-07 |
|
| 406-316
| A |
|
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-316
| 0 |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-11-14 |
|
| 406-316
| 1 |
|
453F ONVOY, LLC - MT |
648 |
|
2021-04-22 |
|
| 406-316
| 2 |
|
624H ONVOY SPECTRUM, LLC |
648 |
|
2021-07-18 |
|
| 406-316
| 3 |
|
453F ONVOY, LLC - MT |
648 |
|
2020-06-05 |
|
| 406-316
| 4 |
|
453F ONVOY, LLC - MT |
648 |
|
2020-11-08 |
|
| 406-316
| 5 |
|
453F ONVOY, LLC - MT |
648 |
|
2021-05-15 |
|
| 406-316
| 6 |
|
453F ONVOY, LLC - MT |
648 |
|
2021-08-28 |
|
| 406-316
| 7 |
|
453F ONVOY, LLC - MT |
648 |
|
2021-10-11 |
|
| 406-316
| 8 |
|
453F ONVOY, LLC - MT |
648 |
|
2021-11-18 |
|
| 406-512
| A |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
|
|
| 406-512
| 0 |
|
073H TELNYX LLC |
648 |
|
2023-07-16 |
|
| 406-512
| 1 |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2023-04-25 |
|
| 406-512
| 2 |
|
453F ONVOY, LLC - MT |
648 |
|
2023-04-26 |
|
| 406-512
| 8 |
|
453F ONVOY, LLC - MT |
648 |
|
2023-08-20 |
|
Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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