Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 833

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-833 A Ronan MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-833 0 Ronan MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2015-03-19   
406-833 1 Ronan MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2023-12-09   
406-833 2 Ronan MT MSSLMTEH4MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2024-03-31   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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