Local Calling Guide
Area code/prefix search
Olney, MT
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-820
| A |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
|
|
| 406-820
| 0 |
|
145J TERRA NOVA TELECOM INC. |
648 |
|
2025-10-09 |
|
| 406-820
| 1 |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-14 |
|
| 406-820
| 2 |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-14 |
|
| 406-820
| 3 |
|
453F ONVOY, LLC - MT |
648 |
|
2012-12-14 |
|
| 406-820
| 4 |
|
453F ONVOY, LLC - MT |
648 |
|
2021-02-11 |
|
| 406-820
| 5 |
|
453F ONVOY, LLC - MT |
648 |
|
2021-02-11 |
|
| 406-820
| 6 |
|
453F ONVOY, LLC - MT |
648 |
|
2019-09-15 |
|
| 406-820
| 7 |
|
453F ONVOY, LLC - MT |
648 |
|
2007-12-06 |
|
| 406-820
| 8 |
|
453F ONVOY, LLC - MT |
648 |
|
2011-03-05 |
|
| 406-820
| 9 |
|
073H TELNYX LLC |
648 |
|
2020-08-13 |
|
| 406-881
| A |
OLNYMTXCRS0 |
2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK |
648 |
|
|
|
| 406-881
| 0 |
|
453F ONVOY, LLC - MT |
648 |
|
2021-07-05 |
|
| 406-881
| 1 |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2023-02-27 |
|
| 406-881
| 2 |
|
2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK |
648 |
|
|
|
| 406-881
| 4 |
|
2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK |
648 |
|
|
|
Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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