Local Calling Guide

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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
406-492 A Avon MT AVONMTXCRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-493 A Missoula MT MSSLMTEH4MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-493 0 Missoula MT MSSLMTEH4MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2006-06-19   
406-493 1 Missoula MT MSSLMTEH4MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2007-10-01   
406-493 2 Missoula MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-04-09   
406-493 3 Missoula MT MSSLMTMADS0  9636 QWEST CORPORATION 648   2009-03-30   
406-493 4 Missoula MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-06-08   
406-493 5 Missoula MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-08-24   
406-493 6 Missoula MT MSSLMTEH4MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2005-08-13   
406-493 7 Missoula MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-10-10   
406-493 8 Missoula MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-10-29   
406-493 9 Missoula MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-12-07   
406-494 A Butte MT BUTTMT18RS1  9636 QWEST CORPORATION 648      
406-495 A Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-495 0 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-495 1 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-495 2 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-495 3 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-495 5 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-495 6 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-495 7 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-495 8 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-495 9 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-496 A Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-496 0 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-496 1 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-496 2 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-496 3 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-496 4 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-496 5 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-496 6 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-496 7 Butte MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2024-05-19   
406-496 8 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-496 9 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-497 A Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-497 0 Butte MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2023-11-27   
406-497 1 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-497 2 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-497 3 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-497 4 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-497 5 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-497 6 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-497 7 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-497 8 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-497 9 Butte MT BUTTMT09DS0  9636 QWEST CORPORATION 648      
406-498 A Butte MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-499 A Seeley Lake MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-499 0 Seeley Lake MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-499 1 Seeley Lake MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2014-11-02   
406-499 2 Seeley Lake MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2012-07-08   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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