Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 707

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-707 A Lewistown MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-707 0 Lewistown MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2015-03-19   
406-707 6 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2020-11-08   
406-707 7 Lewistown MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2024-12-27   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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