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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
406-503 A Billings MT BLNGMTWELMD  318J COMCAST IP PHONE, LLC 650      
406-504 A Fairfield MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-505 A Conrad MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-506 A Billings MT BLNGMT93BMD  321J HD CARRIER LLC 650      
406-507 A Whitefish MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-508 A Frenchtown MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-509 A Missoula MT GRFLMTMAX7X  114J EXIANT COMMUNICATIONS LLC 648   2026-07-27   
406-510 A Missoula MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-512 A Boulder MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-513 A Helena MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-514 A Culbertson MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-515 A Superior MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-516 A Laurel MT BLNGMT93EMD  490J BOOST SUBSCRIBERCO L.L.C. 650      
406-517 A Livingston MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2024-07-22   
406-518 A Gallatin Gateway MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-519 A Missoula MT GRFLMTMANMD  515J IP HORIZON LLC 648      
406-520 A Absarokee MT BLNGMT93BMD  321J HD CARRIER LLC 650      
406-521 A Townsend MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-522 A Bozeman MT BZMNMTMADS0  9636 QWEST CORPORATION 650      
406-523 A Missoula MT MSSLMTMADS0  9636 QWEST CORPORATION 648      
406-524 A Valley Industrial Park MT GAFBMTXCRS1  2247 NEMONT TEL COOP INC 650      
406-525 A South Wolf Point MT WGLNMTXCDS2  2246 MID-RIVERS TEL. COOP., INC. 650      
406-526 A Fort Peck MT FTPCMTXCRS1  2247 NEMONT TEL COOP INC 650      
406-527 A Saco MT SACOMTXCRS1  2247 NEMONT TEL COOP INC 650      
406-528 A Ronan MT RONNMTXCDS0  2252 RONAN TEL. CO. 648      
406-529 A Missoula MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-530 A Laurel MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-531 A Missoula MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-532 A Missoula MT MSSLMTXCDS0  7870 BLACKFOOT COMMUNICATIONS, INC. - MT 648      
406-533 A Butte MT BUTTMT18RS1  9636 QWEST CORPORATION 648      
406-534 A Billings MT BLNGMT93HMD  792K CHARTER IP ENABLED SERVICES, LLC 650      
406-535 A Lewistown MT LWTWMTAQRS1  7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 648      
406-536 A Bozeman MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650   2025-02-09   
406-537 A Melville MT BGTMMTXCDS0  2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-538 A Lewistown MT LWTWMTMADS0  9636 QWEST CORPORATION 648      
406-539 A Bozeman MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-540 A Missoula MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-541 A Missoula MT MSSLMTXCDS0  7870 BLACKFOOT COMMUNICATIONS, INC. - MT 648      
406-542 A Missoula MT MSSLMTMADS0  9636 QWEST CORPORATION 648      
406-543 A Missoula MT MSSLMTMADS0  9636 QWEST CORPORATION 648      
406-544 A Missoula MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-545 A Billings MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-546 A Missoula MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-547 A White Sulphur Springs MT WSSPMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-548 A Bozeman MT BZMNMTMADS0  9636 QWEST CORPORATION 650      
406-549 A Missoula MT MSSLMTMADS0  9636 QWEST CORPORATION 648      
406-550 A Missoula MT MSSLMTXC6MD  732J NUSO, LLC 648      
406-551 A Bozeman MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-552 A Missoula MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-553 A Divide MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      

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

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