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 |
| 406-343
| 3 |
Wyola |
MT |
|
145J TERRA NOVA TELECOM INC. |
650 |
|
2025-08-29 |
|
| 406-343
| 5 |
Wyola |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-343
| 6 |
Wyola |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-343
| 7 |
Wyola |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-343
| 8 |
Wyola |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-343
| 9 |
Wyola |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-344
| A |
Havre |
MT |
HLNAMTMAX1X |
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
|
|
| 406-344
| 0 |
Havre |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2018-01-12 |
|
| 406-344
| 1 |
Havre |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-04-04 |
|
| 406-344
| 2 |
Havre |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2018-01-20 |
|
| 406-344
| 3 |
Havre |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
648 |
|
2016-09-11 |
|
| 406-344
| 4 |
Havre |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-09-15 |
|
| 406-344
| 5 |
Havre |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-01-03 |
|
| 406-344
| 6 |
Havre |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-09-15 |
|
| 406-344
| 7 |
Havre |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-01-03 |
|
| 406-344
| 8 |
Havre |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2019-10-28 |
|
| 406-344
| 9 |
Havre |
MT |
|
453F ONVOY, LLC - MT |
648 |
|
2020-06-05 |
|
| 406-345
| A |
Glendive |
MT |
GLNDMTAJRS0 |
7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. |
650 |
|
|
|
| 406-345
| 0 |
Glendive |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2016-12-23 |
|
| 406-345
| 1 |
Glendive |
MT |
|
588H AIRUS, INC. - MT |
650 |
|
2018-03-11 |
|
| 406-345
| 2 |
Glendive |
MT |
|
7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. |
650 |
|
|
|
| 406-345
| 3 |
Glendive |
MT |
|
7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. |
650 |
|
|
|
| 406-345
| 4 |
Glendive |
MT |
|
145J TERRA NOVA TELECOM INC. |
650 |
|
2021-01-21 |
|
| 406-345
| 5 |
Glendive |
MT |
|
994E BANDWIDTH.COM CLEC, LLC - MT |
650 |
|
2021-12-04 |
|
| 406-345
| 6 |
Glendive |
MT |
|
453F ONVOY, LLC - MT |
650 |
|
2019-10-28 |
|
| 406-345
| 7 |
Glendive |
MT |
|
7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. |
650 |
|
|
|
| 406-345
| 8 |
Glendive |
MT |
|
7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. |
650 |
|
|
|
| 406-345
| 9 |
Glendive |
MT |
|
7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. |
650 |
|
|
|
| 406-346
| A |
Forsyth |
MT |
FRSYMTMA0MD |
8140 RANGE TELEPHONE COOPERATIVE, INC. - MT |
650 |
|
|
|
| 406-346
| 0 |
Forsyth |
MT |
|
6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT |
650 |
|
2023-07-18 |
|
| 406-346
| 1 |
Forsyth |
MT |
|
8140 RANGE TELEPHONE COOPERATIVE, INC. - MT |
650 |
|
|
|
| 406-346
| 2 |
Forsyth |
MT |
|
8140 RANGE TELEPHONE COOPERATIVE, INC. - MT |
650 |
|
|
|
| 406-346
| 3 |
Forsyth |
MT |
|
8140 RANGE TELEPHONE COOPERATIVE, INC. - MT |
650 |
|
|
|
| 406-346
| 4 |
Forsyth |
MT |
|
8140 RANGE TELEPHONE COOPERATIVE, INC. - MT |
650 |
|
|
|
| 406-346
| 5 |
Forsyth |
MT |
|
8140 RANGE TELEPHONE COOPERATIVE, INC. - MT |
650 |
|
|
|
| 406-346
| 6 |
Forsyth |
MT |
|
8140 RANGE TELEPHONE COOPERATIVE, INC. - MT |
650 |
|
|
|
| 406-346
| 7 |
Forsyth |
MT |
|
8140 RANGE TELEPHONE COOPERATIVE, INC. - MT |
650 |
|
|
|
| 406-346
| 8 |
Forsyth |
MT |
|
8140 RANGE TELEPHONE COOPERATIVE, INC. - MT |
650 |
|
|
|
| 406-346
| 9 |
Forsyth |
MT |
|
8140 RANGE TELEPHONE COOPERATIVE, INC. - MT |
650 |
|
|
|
| 406-347
| A |
Rosebud |
MT |
RSBDMTXCRS1 |
2251 RANGE TEL COOP INC |
650 |
|
|
|
| 406-348
| A |
Huntley |
MT |
HNTLMTXCRS1 |
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-348
| 0 |
Huntley |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-348
| 1 |
Huntley |
MT |
|
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
650 |
|
2025-03-06 |
|
| 406-348
| 2 |
Huntley |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-348
| 3 |
Huntley |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-348
| 4 |
Huntley |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-348
| 5 |
Huntley |
MT |
|
792K CHARTER IP ENABLED SERVICES, LLC |
650 |
|
2025-04-08 |
|
| 406-348
| 6 |
Huntley |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-348
| 7 |
Huntley |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
| 406-348
| 8 |
Huntley |
MT |
|
2250 PROJECT TEL. CO., INC. |
650 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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