Local Calling Guide

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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
406-605 A Butte MT MSSLMTMAEMD  073H TELNYX LLC 648      
406-606 A Billings MT BLNGMTMATMD  935G TRI TEL, INC. - MT 650      
406-607 A Kalispell MT KLSLMTXC4MD  7870 BLACKFOOT COMMUNICATIONS, INC. - MT 648      
406-608 A Billings MT BLNGMTASKMD  515J IP HORIZON LLC 650      
406-609 A Kalispell MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-610 A Missoula MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648   2025-03-03   
406-612 A Swan Lake MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-613 A Bozeman MT BLNGMTWE8MD  508J CENTURYLINK COMMUNICATIONS, LLC 650      
406-614 A Bigfork MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-615 A Thompson Falls MT CHRLMT010MD  986F WESTERN MONTANA COMMUNITYTEL INC. - MT 648      
406-616 A Three Forks MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-617 A Billings MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650   2025-02-16   
406-618 A Missoula MT GRFLMTTH1MD  520K TDS METROCOM, LLC 648   2025-12-05   
406-620 A Billings MT GLSGMTXC1MD  443B SAGEBRUSH CELLULAR, INC. 650      
406-621 A Fort Benton MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-622 A Fort Benton MT FTBNMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-623 A Hardin MT BLNGMTVR0MD  939H COMMIO, LLC 650      
406-624 A Bozeman MT BZMNMTHZDS0  746D MONTANA OPTICOM, LLC - MT 650      
406-625 A Stevensville MT MSSLMTMAX0X  7421 AT&T - LOCAL 648   2024-02-23   
406-626 A Frenchtown MT FCTWMTMARS1  9636 QWEST CORPORATION 648      
406-627 A East Conrad MT FRFDMTXCDS1  2255 3 RIVERS TEL. COOP., INC. 648      
406-628 A Laurel MT LARLMTMARS1  9636 QWEST CORPORATION 650      
406-629 A Hardin MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-630 A Sidney MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-631 A Elmo MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-632 A Harlowton MT WSSPMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-633 A Laurel MT PRCYMTMARS1  9636 QWEST CORPORATION 650      
406-634 A Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-635 A Terry MT WGLNMTXCDS2  2246 MID-RIVERS TEL. COOP., INC. 650      
406-636 A Lavina MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-637 A Terry MT TRRYMTMARS1  9636 QWEST CORPORATION 650      
406-638 A Hardin MT CWAGMTXCDS0  2250 PROJECT TEL. CO., INC. 650      
406-639 A Lodge Grass MT LDGSMTXCRS1  2250 PROJECT TEL. CO., INC. 650      
406-640 A West Yellowstone MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-641 A West Yellowstone MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-642 A Victor MT VCTRMTMARS1  9636 QWEST CORPORATION 648      
406-643 A North Parkman MT CHYNWYMAX2X  453F ONVOY, LLC - MT 654      
406-644 A Charlo MT CHRLMTXCRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-645 A Deer Lodge MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-646 A West Yellowstone MT WYLWMTMARS1  9636 QWEST CORPORATION 650      
406-647 A Billings MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650      
406-648 A North Hinsdale MT NHDLMTXCRS1  2247 NEMONT TEL COOP INC 650      
406-649 A St Regis MT ALTNMTXBRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-650 A Wolf Point MT GLSGMTXC1MD  443B SAGEBRUSH CELLULAR, INC. 650      
406-651 A Billings MT BLNGMTWEDS0  9636 QWEST CORPORATION 650      
406-652 A Billings MT BLNGMTWEDS0  9636 QWEST CORPORATION 650      
406-653 A Wolf Point MT WLPNMTXCDS0  2247 NEMONT TEL COOP INC 650      
406-654 A Malta MT FTBNMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-655 A Billings MT BLNGMTWEDS0  9636 QWEST CORPORATION 650      
406-656 A Billings MT BLNGMTWEDS0  9636 QWEST CORPORATION 650      

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

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