Local Calling Guide
Area code/prefix search
NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]
NXX: 558
NPA-NXX | BLOCK | Rate Centre | Region | Switch | OCN | LATA | LIR | Eff date | Disc date |
---|---|---|---|---|---|---|---|---|---|
406-558 | A | Helena | MT | MSSLMTMA0MD | 9415 LEVEL 3 COMMUNICATIONS, LLC - MT | 648 | |||
406-558 | 2 | Helena | MT | MSSLMTMA0MD | 9415 LEVEL 3 COMMUNICATIONS, LLC - MT | 648 | 2014-10-24 | ||
406-558 | 3 | Helena | MT | MSSLMTMA0MD | 9415 LEVEL 3 COMMUNICATIONS, LLC - MT | 648 | 2021-10-02 | ||
406-558 | 4 | Helena | MT | MSSLMTMA0MD | 9415 LEVEL 3 COMMUNICATIONS, LLC - MT | 648 | |||
406-558 | 5 | Helena | MT | 453F ONVOY, LLC - MT | 648 | 2024-05-05 | |||
406-558 | 6 | Helena | MT | 453F ONVOY, LLC - MT | 648 | 2024-05-05 | |||
406-558 | 7 | Helena | MT | 453F ONVOY, LLC - MT | 648 | 2024-05-05 | |||
406-558 | 9 | Helena | MT | HLNAMTMAX1X | 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 648 | 2004-09-27 |
Last updated: Tue, 16 Apr 2024 01:38:01 UTC
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