Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-371 4 Billings MT BLNGMTWEAMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2013-08-30   
406-371 5 Billings MT BLNGMT93PS1  008E BRESNAN BROADBAND OF MONTANA, LLC - MT [CHARTER] 650   2006-12-08   
406-371 6 Billings MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650   2007-03-18   
406-371 7 Billings MT BLNGMT93PS1  008E BRESNAN BROADBAND OF MONTANA, LLC - MT [CHARTER] 650   2014-04-30   
406-371 8 Billings MT BLNGMTMADS1  9636 QWEST CORPORATION 650   2006-07-10   
406-371 9 Billings MT BLNGMTWEAMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2004-09-19   
406-372 A Kremlin MT HAVRMTXCDS0  2257 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-373 A Billings MT SHPHMTMARS1  9636 QWEST CORPORATION 650      
406-373 0 Billings MT SHPHMTMARS1  9636 QWEST CORPORATION 650      
406-373 1 Billings MT SHPHMTMARS1  9636 QWEST CORPORATION 650      
406-373 2 Billings MT SHPHMTMARS1  9636 QWEST CORPORATION 650      
406-373 3 Billings MT BLNGMTWEDS0  9636 QWEST CORPORATION 650      
406-373 4 Billings MT BLNGMT939MD  145J TERRA NOVA TELECOM INC. 650   2022-12-17   
406-373 5 Billings MT SHPHMTMARS1  9636 QWEST CORPORATION 650      
406-373 6 Billings MT SHPHMTMARS1  9636 QWEST CORPORATION 650      
406-373 7 Billings MT BLNGMTMADS1  9636 QWEST CORPORATION 650      
406-373 8 Billings MT BLNGMTWEDS0  9636 QWEST CORPORATION 650   2004-11-22   
406-373 9 Billings MT SHPHMTMARS1  9636 QWEST CORPORATION 650      
406-374 A Moore MT FTBNMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-375 A Hamilton MT HMTNMTMADS0  9636 QWEST CORPORATION 648      
406-375 0 Hamilton MT HMTNMTMADS0  9636 QWEST CORPORATION 648      
406-375 1 Hamilton MT HMTNMTMADS0  9636 QWEST CORPORATION 648      
406-375 2 Hamilton MT HMTNMTMADS0  9636 QWEST CORPORATION 648      
406-375 3 Hamilton MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2022-09-19   
406-375 4 Hamilton MT HMTNMTMADS0  9636 QWEST CORPORATION 648      
406-375 5 Hamilton MT MSSLMTEHPS0  008E BRESNAN BROADBAND OF MONTANA, LLC - MT [CHARTER] 648   2006-05-17   
406-375 6 Hamilton MT HMTNMTMADS0  9636 QWEST CORPORATION 648      
406-375 7 Hamilton MT HMTNMTMADS0  9636 QWEST CORPORATION 648      
406-375 8 Hamilton MT HMTNMTMADS0  9636 QWEST CORPORATION 648      
406-375 9 Hamilton MT HMTNMTMADS0  9636 QWEST CORPORATION 648      
406-376 A Gildford MT HAVRMTXCDS0  2257 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-377 A Glendive (Mid-Rivers) MT GLNDMTAJRS0  7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650      
406-378 A Big Sandy MT HAVRMTXCDS0  2257 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-379 A Turner MT HAVRMTXCDS0  2257 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-380 A Lewistown MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-380 0 Lewistown MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-380 1 Lewistown MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2021-04-22   
406-380 2 Lewistown MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-08-08   
406-380 3 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2020-01-03   
406-380 4 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-09-15   
406-380 5 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2022-12-04   
406-380 7 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-07-05   
406-380 8 Lewistown MT GRFLMTMAHMD  073H TELNYX LLC 648   2020-08-13   
406-380 9 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-07-05   
406-381 A Hamilton MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-382 A Superior MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-382 0 Superior MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-382 3 Superior MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2016-06-27   
406-382 9 Superior MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648   2018-04-05   
406-383 A Dodson MT FTBNMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 648      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 >>

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.