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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
406-301 A Malta MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-302 A Wolf Creek MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-303 A Missoula MT MSSLMTMAYMD  771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 648      
406-304 A Missoula MT MSSLMTMACMD  6529 T-MOBILE USA, INC. 648      
406-305 A White Sulphur Springs MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-306 A Manhattan MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-307 A Canyon Creek MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2025-05-02   
406-308 A Cascade MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-309 A Kalispell MT KLSLMTAZ1MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-310 A Butte MT BUTTMTAQ2MD  7870 BLACKFOOT COMMUNICATIONS, INC. - MT 648      
406-312 A Bozeman MT BLNGMT93AMD  478J NUSO, LLC 650      
406-313 A Boulder MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-314 A Kalispell MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-315 A Great Falls MT MALTMTXC1MD  443B SAGEBRUSH CELLULAR, INC. 648      
406-316 A Boulder MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-317 A Missoula MT GRFLMTMAHMD  073H TELNYX LLC 648      
406-318 A Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2025-03-23   
406-319 A Polson MT MSSLMTEH4MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-320 A Roundup MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-321 A Columbus MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-322 A Columbus MT CLMBMTMARS1  9636 QWEST CORPORATION 650      
406-323 A Roundup MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-324 A Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-325 A Billings MT BLNGMTMAX6X  732J NUSO, LLC 650      
406-326 A Reedpoint MT BGTMMTXCDS0  2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-327 A Missoula MT MSSLMTMADS0  9636 QWEST CORPORATION 648      
406-328 A Absarokee MT ABSRMTXCDS0  2250 PROJECT TEL. CO., INC. 650      
406-329 A Missoula MT MSSLMTMADS0  9636 QWEST CORPORATION 648      
406-330 A Clinton MT MSSLMTEH4MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-331 A Roundup MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-332 A Pablo MT MSSLMTXCDS0  2235 BLACKFOOT TEL. COOP., INC. 648      
406-333 A Livingston MT PRAYMTMARS1  9636 QWEST CORPORATION 650      
406-334 A Libby MT CRALIDABXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 960      
406-335 A Sweetgrass MT SNBRMTXCDS0  2248 NORTHERN TEL. COOP., INC. 648      
406-336 A North Cut Bank MT SNBRMTXCDS0  2248 NORTHERN TEL. COOP., INC. 648      
406-337 A Kevin-Oilmont MT SNBRMTXCDS0  2248 NORTHERN TEL. COOP., INC. 648      
406-338 A Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648      
406-339 A Ethridge MT SNBRMTXCDS0  2248 NORTHERN TEL. COOP., INC. 648      
406-340 A Lima MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-341 A Manhattan MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-342 A Hysham MT HYSHMTXCRS1  2251 RANGE TEL COOP INC 650      
406-343 A Wyola MT WYOLMTXCRS1  2250 PROJECT TEL. CO., INC. 650      
406-344 A Havre MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-345 A Glendive MT GLNDMTAJRS0  7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650      
406-346 A Forsyth MT FRSYMTMA0MD  8140 RANGE TELEPHONE COOPERATIVE, INC. - MT 650      
406-347 A Rosebud MT RSBDMTXCRS1  2251 RANGE TEL COOP INC 650      
406-348 A Huntley MT HNTLMTXCRS1  2250 PROJECT TEL. CO., INC. 650      
406-349 A Alta MT ALTAMTXCRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-350 A Lewistown MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-351 A Forsyth MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      

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

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