Local Calling Guide
Area code/prefix search
NPA: 406
[Rate centres in NPA 406]
[Dial plan for NPA 406]
NXX: 204
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 406-204
| A |
Helena |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
|
|
| 406-204
| 0 |
Helena |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
|
|
| 406-204
| 1 |
Helena |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2012-12-13 |
|
| 406-204
| 2 |
Helena |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2012-12-13 |
|
| 406-204
| 3 |
Helena |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
2011-11-25 |
|
| 406-204
| 4 |
Helena |
MT |
MSSLMTMA0MD |
9415 LEVEL 3 COMMUNICATIONS, LLC - MT |
648 |
|
|
|
| 406-204
| 5 |
Helena |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2012-12-13 |
|
| 406-204
| 6 |
Helena |
MT |
GRFLMTMAHMD |
073H TELNYX LLC |
648 |
|
2024-03-11 |
|
| 406-204
| 7 |
Helena |
MT |
GRFLMTMA7MD |
453F ONVOY, LLC - MT |
648 |
|
2012-12-13 |
|
| 406-204
| 8 |
Helena |
MT |
HLNAMTMAWMD |
5562 METROPCS, INC. |
648 |
|
2017-08-31 |
|
| 406-204
| 9 |
Helena |
MT |
HLNAMTMAWMD |
5562 METROPCS, INC. |
648 |
|
2017-08-31 |
|
Last updated: Sun, 26 Jan 2025 15:59:20 UTC
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