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NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

Block: A

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-402 A Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648      
406-403 A Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-404 A Bozeman MT BZMNMTEF2MD  792K CHARTER IP ENABLED SERVICES, LLC 650      
406-405 A Libby MT CRALIDXXX7X  453F ONVOY, LLC - MT 960      
406-406 A Missoula MT MSSLMTMADS3  509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-407 A Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-408 A Hays MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-409 A Billings MT BLNGMTASX0X  425J CSC WIRELESS, LLC 650      
406-410 A Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-412 A Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-413 A Billings MT BLNGMTMADS1  9636 QWEST CORPORATION 650      
406-414 A Bozeman MT BZMNMTMADS0  9636 QWEST CORPORATION 650      
406-415 A Deer Lodge MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-416 A Forsyth MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-417 A Helena MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-418 A Cooke City MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-419 A Victor MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2025-01-13   
406-420 A Bigfork MT KLSLMTAZ1MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-421 A South Miles City MT MLCYMTXCRS1  2251 RANGE TEL COOP INC 650      
406-422 A Helena MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-423 A Hobson MT FTBNMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-424 A Shelby MT SHLBMTALRL0  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-425 A Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-426 A Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-427 A South Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-428 A Grass Range MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 A Winnett MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-430 A Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-431 A Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-432 A Devon MT SNBRMTXCDS0  2248 NORTHERN TEL. COOP., INC. 648      
406-433 A Sidney MT SDNYMTAORS0  7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650      
406-434 A Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-435 A Billings MT BLNHMTUK1MD  520K TDS METROCOM, LLC 650      
406-436 A Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-437 A Helena MT HLNAMTMAMMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648      
406-438 A Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-439 A Helena MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-440 A Helena MT HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-441 A Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-442 A Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-443 A Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-444 A Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-445 A Red Lodge MT RBRTMTMARS1  9636 QWEST CORPORATION 650      
406-446 A Red Lodge MT RDLGMTMARS1  9636 QWEST CORPORATION 650      
406-447 A Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-448 A North Poplar MT NPPLMTXCRS1  2247 NEMONT TEL COOP INC 650      
406-449 A Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-450 A Shelby MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-451 A Bozeman MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650      
406-452 A Great Falls MT GRFLMTMADS0  9636 QWEST CORPORATION 648      

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Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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