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
406-451 8 Bozeman MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2004-09-27   
406-451 9 Bozeman MT   6529 T-MOBILE USA, INC. 650   2004-09-27   
406-452 A Great Falls MT GRFLMTMADS0  9636 QWEST CORPORATION 648      
406-453 A Great Falls MT GRFLMTMADS0  9636 QWEST CORPORATION 648      
406-454 A Great Falls MT GRFLMTMADS0  9636 QWEST CORPORATION 648      
406-455 A Great Falls MT   247L YORKSTREAM COMMUNICATIONS LLC 648      
406-455 0 Great Falls MT   9636 QWEST CORPORATION 648      
406-455 1 Great Falls MT   9636 QWEST CORPORATION 648      
406-455 2 Great Falls MT   9636 QWEST CORPORATION 648      
406-455 3 Great Falls MT   9636 QWEST CORPORATION 648      
406-455 4 Great Falls MT   9636 QWEST CORPORATION 648      
406-455 5 Great Falls MT   9636 QWEST CORPORATION 648      
406-455 6 Great Falls MT   9636 QWEST CORPORATION 648      
406-455 7 Great Falls MT   247L YORKSTREAM COMMUNICATIONS LLC 648   2025-10-06   
406-455 8 Great Falls MT   9636 QWEST CORPORATION 648      
406-455 9 Great Falls MT   9636 QWEST CORPORATION 648      
406-456 A South Chester MT HAVRMTXCDS0  2257 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-457 A Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-457 0 Helena MT   9636 QWEST CORPORATION 648      
406-457 1 Helena MT   9636 QWEST CORPORATION 648      
406-457 2 Helena MT   9636 QWEST CORPORATION 648      
406-457 3 Helena MT   9636 QWEST CORPORATION 648      
406-457 4 Helena MT   9636 QWEST CORPORATION 648      
406-457 5 Helena MT   9636 QWEST CORPORATION 648      
406-457 7 Helena MT   9636 QWEST CORPORATION 648      
406-457 8 Helena MT   9636 QWEST CORPORATION 648      
406-457 9 Helena MT   9636 QWEST CORPORATION 648      
406-458 A Helena MT HLNAMTNORS1  9636 QWEST CORPORATION 648      
406-458 0 Helena MT   9636 QWEST CORPORATION 648      
406-458 1 Helena MT   9636 QWEST CORPORATION 648      
406-458 3 Helena MT   9636 QWEST CORPORATION 648      
406-458 4 Helena MT   9636 QWEST CORPORATION 648      
406-458 5 Helena MT   9636 QWEST CORPORATION 648      
406-458 6 Helena MT   9636 QWEST CORPORATION 648      
406-458 7 Helena MT   9636 QWEST CORPORATION 648      
406-458 8 Helena MT   9636 QWEST CORPORATION 648      
406-458 9 Helena MT   9636 QWEST CORPORATION 648      
406-459 A Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-460 A Shelby MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-460 0 Shelby MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-460 1 Shelby MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-460 2 Shelby MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-461 A Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-462 A Winifred MT HAVRMTXCDS0  2257 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-463 A Power MT FRFDMTXCDS1  2255 3 RIVERS TEL. COOP., INC. 648      
406-464 A Roy MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-464 2 Roy MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-464 4 Roy MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2018-12-17   
406-464 6 Roy MT   145J TERRA NOVA TELECOM INC. 650   2025-08-29   
406-465 A Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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