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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-421 2 South Miles City MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-421 5 South Miles City MT MLCYMTXCRS1  2251 RANGE TEL COOP INC 650      
406-421 9 South Miles City MT MLCYMTXCRS1  2251 RANGE TEL COOP INC 650      
406-422 A Helena MT   792K CHARTER IP ENABLED SERVICES, LLC 648      
406-422 0 Helena MT   792K CHARTER IP ENABLED SERVICES, LLC 648      
406-422 1 Helena MT   792K CHARTER IP ENABLED SERVICES, LLC 648      
406-422 2 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-422 3 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-422 4 Helena MT   792K CHARTER IP ENABLED SERVICES, LLC 648      
406-422 5 Helena MT   792K CHARTER IP ENABLED SERVICES, LLC 648      
406-422 6 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-422 7 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-422 8 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-422 9 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-423 A Hobson MT FTBNMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-424 A Shelby MT SHLBMTALRL0  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-424 0 Shelby MT GRFLMTMAHMD  073H TELNYX LLC 648      
406-424 1 Shelby MT SHLBMTALRL0  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-424 2 Shelby MT SHLBMTALRL0  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-424 4 Shelby MT SHLBMTALRL0  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-424 5 Shelby MT SHLBMTALRL0  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-424 7 Shelby MT SHLBMTALRL0  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-424 8 Shelby MT SHLBMTALRL0  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-424 9 Shelby MT SHLBMTALRL0  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-425 A Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-425 0 Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-425 1 Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-425 2 Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-425 3 Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-425 4 Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-425 5 Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-425 6 Red Lodge MT BLNGMT939MD  145J TERRA NOVA TELECOM INC. 650      
406-425 7 Red Lodge MT   624H ONVOY SPECTRUM, LLC 650      
406-425 9 Red Lodge MT   145J TERRA NOVA TELECOM INC. 650      
406-426 A Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-426 0 Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-426 1 Red Lodge MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650      
406-426 2 Red Lodge MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650      
406-426 3 Red Lodge MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650      
406-426 4 Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-426 5 Red Lodge MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-426 6 Red Lodge MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-426 7 Red Lodge MT BLNGMTWE8MD  508J CENTURYLINK COMMUNICATIONS, LLC 650      
406-426 8 Red Lodge MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-426 9 Red Lodge MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650      
406-427 A South Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-428 A Grass Range MT GRRNMTXCRS1  2246 MID-RIVERS TEL. COOP., INC. 650      
406-428 2 Grass Range MT GRRNMTXCRS1  2246 MID-RIVERS TEL. COOP., INC. 650      
406-428 8 Grass Range MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-429 A Winnett MT WNTTMTXCRS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-430 A Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-430 0 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-430 1 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-430 2 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-430 3 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-430 4 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-430 5 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-430 6 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-430 7 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-430 8 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-430 9 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-431 A Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-432 A Devon MT SNBRMTXCDS0  2248 NORTHERN TEL. COOP., INC. 648      
406-433 A Sidney MT SDNYMTAORS0  7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650      
406-434 A Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-434 2 Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-434 3 Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-434 5 Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-434 6 Shelby MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-434 7 Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-434 8 Shelby MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-434 9 Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-435 A Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 0 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 1 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 2 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 3 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 4 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 5 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 6 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 7 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 8 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 9 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-436 A Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-436 0 Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-436 2 Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-436 5 Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-436 9 Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-437 A Helena MT HLNAMTMAMMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648      
406-437 0 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-437 1 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-437 2 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-437 3 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-437 4 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-437 5 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-437 6 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-437 7 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-437 8 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-437 9 Helena MT HLNAMTMAMMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648      
406-438 A Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 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 >>

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.