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 92 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-320 A Roundup MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-320 0 Roundup MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-320 1 Roundup MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-320 2 Roundup MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-320 3 Roundup MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2019-10-10   
406-321 A Columbus MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-321 0 Columbus MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-321 1 Columbus MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-321 2 Columbus MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-321 3 Columbus MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-321 4 Columbus MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-321 5 Columbus MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2021-02-11   
406-321 6 Columbus MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2021-02-11   
406-321 7 Columbus MT   145J TERRA NOVA TELECOM INC. 650   2021-09-28   
406-321 8 Columbus MT BLNGMT93DS0  588H AIRUS, INC. - MT 650   2020-07-20   
406-321 9 Columbus MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-322 A Columbus MT CLMBMTMARS1  9636 QWEST CORPORATION 650      
406-322 0 Columbus MT CLMBMTMARS1  9636 QWEST CORPORATION 650      
406-322 1 Columbus MT CLMBMTMARS1  9636 QWEST CORPORATION 650      
406-322 2 Columbus MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2004-11-13   
406-322 3 Columbus MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2006-01-06   
406-322 4 Columbus MT CLMBMTMARS1  9636 QWEST CORPORATION 650      
406-322 5 Columbus MT CLMBMTMARS1  9636 QWEST CORPORATION 650      
406-322 6 Columbus MT CLMBMTMARS1  9636 QWEST CORPORATION 650      
406-322 7 Columbus MT   939H COMMIO, LLC 650   2024-03-04   
406-322 8 Columbus MT CLMBMTMARS1  9636 QWEST CORPORATION 650      
406-322 9 Columbus MT CLMBMTMARS1  9636 QWEST CORPORATION 650      
406-323 A Roundup MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-323 1 Roundup MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-323 2 Roundup MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-323 3 Roundup MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-323 4 Roundup MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-323 7 Roundup MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-323 8 Roundup MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-323 9 Roundup MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-324 A Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-324 1 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-324 2 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-324 3 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-324 4 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-324 5 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-324 6 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-324 7 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2006-05-27   
406-324 9 Helena MT GRFLMTMAHMD  073H TELNYX LLC 648   2020-08-13   
406-325 A Billings MT BLNGMTMAX6X  732J NUSO, LLC 650      
406-325 0 Billings MT   939H COMMIO, LLC 650   2024-03-03   
406-325 1 Billings MT BLNGMTMAX6X  732J NUSO, LLC 650   2022-09-29   
406-325 2 Billings MT   939H COMMIO, LLC 650   2024-03-03   
406-325 3 Billings MT   939H COMMIO, LLC 650   2024-03-03   
406-325 4 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      

<< 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 92 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.