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: 423 [Rate centres in NPA 423] [Dial plan for NPA 423]

<< 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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-809 6 Pikeville TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2023-08-19   
423-809 7 Pikeville TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2023-08-19   
423-809 8 Pikeville TN   4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472   2023-08-08   
423-809 9 Pikeville TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2023-08-19   
423-810 A Charleston TN CHTGTNNSXEY  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 472      
423-810 0 Charleston TN   525E ONVOY, LLC - TN 472   2016-04-06   
423-810 1 Charleston TN   525E ONVOY, LLC - TN 472   2016-04-06   
423-810 2 Charleston TN   4645 ELECTRIC POWER BOARD OF CHATTANOOGA 472   2020-02-24   
423-810 3 Charleston TN   204G TWIN LAKES COMMUNICATIONS, INC. - TN 472   2022-12-30   
423-810 4 Charleston TN   073H TELNYX LLC 472   2023-01-27   
423-810 5 Charleston TN   525E ONVOY, LLC - TN 472   2023-08-11   
423-810 6 Charleston TN   114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 472   2015-10-01   
423-810 7 Charleston TN   525E ONVOY, LLC - TN 472   2023-08-11   
423-810 8 Charleston TN   525E ONVOY, LLC - TN 472   2019-04-26   
423-810 9 Charleston TN   525E ONVOY, LLC - TN 472   2019-04-26   
423-812 A Greeneville TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956      
423-812 0 Greeneville TN   124F BANDWIDTH.COM CLEC, LLC - TN 956   2016-10-22   
423-812 1 Greeneville TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2019-09-29   
423-812 2 Greeneville TN   318J COMCAST IP PHONE, LLC 956   2020-12-25   
423-812 3 Greeneville TN   073H TELNYX LLC 956   2021-01-23   
423-812 4 Greeneville TN   124F BANDWIDTH.COM CLEC, LLC - TN 956   2023-02-23   
423-812 5 Greeneville TN   124F BANDWIDTH.COM CLEC, LLC - TN 956   2023-02-23   
423-812 6 Greeneville TN   124F BANDWIDTH.COM CLEC, LLC - TN 956   2025-09-06   
423-812 8 Greeneville TN   939H COMMIO, LLC 956   2022-10-23   
423-812 9 Greeneville TN   624H ONVOY SPECTRUM, LLC 956   2023-04-27   
423-813 A Cleveland TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-813 0 Cleveland TN   6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2016-02-07   
423-813 1 Cleveland TN   525E ONVOY, LLC - TN 472   2019-06-23   
423-813 2 Cleveland TN   6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2024-12-21   
423-813 3 Cleveland TN   124F BANDWIDTH.COM CLEC, LLC - TN 472   2016-07-22   
423-813 4 Cleveland TN   516C AT&T CORP. 472   2016-10-03   
423-813 5 Cleveland TN   7473 POWERTEL ATLANTA LICENSES, INC. 472   2022-01-13   
423-813 6 Cleveland TN   7473 POWERTEL ATLANTA LICENSES, INC. 472   2022-01-13   
423-813 7 Cleveland TN   792K CHARTER IP ENABLED SERVICES, LLC 472   2016-03-14   
423-813 8 Cleveland TN   525E ONVOY, LLC - TN 472   2019-06-23   
423-813 9 Cleveland TN   6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2015-11-22   
423-814 A Sweetwater TN KNVNTNEC0MD  073H TELNYX LLC 474      
423-814 0 Sweetwater TN   073H TELNYX LLC 474   2017-03-30   
423-814 1 Sweetwater TN   525E ONVOY, LLC - TN 474   2018-04-02   
423-814 2 Sweetwater TN   5562 METROPCS, INC. 474   2021-05-07   
423-814 3 Sweetwater TN   525E ONVOY, LLC - TN 474   2021-03-19   
423-814 4 Sweetwater TN   525E ONVOY, LLC - TN 474   2021-03-19   
423-814 5 Sweetwater TN   6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2020-04-23   
423-814 6 Sweetwater TN   7476 POWERTEL NASHVILLE LICENSES, INC. 474   2021-09-17   
423-814 7 Sweetwater TN   7476 POWERTEL NASHVILLE LICENSES, INC. 474   2021-09-17   
423-814 8 Sweetwater TN   6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2025-01-01   
423-815 A Whitwell TN CHTGTNNSXRZ  318J COMCAST IP PHONE, LLC 472      
423-815 0 Whitwell TN   318J COMCAST IP PHONE, LLC 472   2007-11-05   
423-815 1 Whitwell TN   124F BANDWIDTH.COM CLEC, LLC - TN 472   2013-06-24   
423-815 2 Whitwell TN   4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472   2008-05-13   
423-815 3 Whitwell TN   4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472   2008-05-13   
423-815 4 Whitwell TN   516C AT&T CORP. 472   2011-08-29   
423-815 5 Whitwell TN   4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472   2008-04-28   
423-815 6 Whitwell TN   525E ONVOY, LLC - TN 472   2016-04-01   
423-815 7 Whitwell TN   508J CENTURYLINK COMMUNICATIONS, LLC 472   2014-05-06   
423-815 8 Whitwell TN   525E ONVOY, LLC - TN 472   2016-04-01   
423-815 9 Whitwell TN   124F BANDWIDTH.COM CLEC, LLC - TN 472   2008-11-28   
423-816 A Bristol TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-816 0 Bristol TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2023-02-04   
423-816 1 Bristol TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2023-02-04   
423-816 2 Bristol TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2023-02-04   
423-816 3 Bristol TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2023-02-04   
423-816 4 Bristol TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2023-02-04   
423-816 5 Bristol TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2023-02-04   
423-816 6 Bristol TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2023-02-04   
423-816 7 Bristol TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2023-02-04   
423-816 8 Bristol TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2023-02-04   
423-816 9 Bristol TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2023-02-04   
423-817 A Kingsport TN JHCYTNXCX2Y  5562 METROPCS, INC. 956      
423-817 0 Kingsport TN   8645 SUNCOM DBA T-MOBILE USA 956      
423-817 1 Kingsport TN   5562 METROPCS, INC. 956      
423-817 2 Kingsport TN   5562 METROPCS, INC. 956      
423-817 3 Kingsport TN   5562 METROPCS, INC. 956      
423-817 4 Kingsport TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2025-11-16   
423-817 5 Kingsport TN   6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2008-04-14   
423-817 6 Kingsport TN   939H COMMIO, LLC 956   2022-10-23   
423-817 7 Kingsport TN   624H ONVOY SPECTRUM, LLC 956   2023-04-27   
423-817 8 Kingsport TN   6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2008-06-06   
423-817 9 Kingsport TN   5562 METROPCS, INC. 956   2007-07-31   
423-818 A Jellico TN KNVNTNECDMD  276F PEERLESS NETWORK OF TENNESSEE, LLC - TN 474      
423-818 0 Jellico TN   525E ONVOY, LLC - TN 474   2016-11-12   
423-818 1 Jellico TN   525E ONVOY, LLC - TN 474   2018-03-31   
423-818 2 Jellico TN   124F BANDWIDTH.COM CLEC, LLC - TN 474   2025-10-10   
423-818 3 Jellico TN   124F BANDWIDTH.COM CLEC, LLC - TN 474   2021-06-19   
423-818 4 Jellico TN   525E ONVOY, LLC - TN 474   2021-10-25   
423-818 5 Jellico TN   145J TERRA NOVA TELECOM INC. 474   2023-12-17   
423-818 6 Jellico TN   525E ONVOY, LLC - TN 474   2021-07-30   
423-818 7 Jellico TN   525E ONVOY, LLC - TN 474   2021-03-04   
423-818 8 Jellico TN   073H TELNYX LLC 474   2018-09-21   
423-818 9 Jellico TN   525E ONVOY, LLC - TN 474   2020-12-21   
423-819 A Cleveland TN CHTGTN12X8Y  732J NUSO, LLC 472      
423-819 0 Cleveland TN   6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2023-03-05   
423-819 1 Cleveland TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2024-11-22   
423-819 2 Cleveland TN   624H ONVOY SPECTRUM, LLC 472   2023-06-17   
423-819 3 Cleveland TN   732J NUSO, LLC 472   2023-08-17   
423-819 4 Cleveland TN   525E ONVOY, LLC - TN 472   2023-09-09   
423-819 5 Cleveland TN   525E ONVOY, LLC - TN 472   2023-09-09   
423-819 6 Cleveland TN   525E ONVOY, LLC - TN 472   2023-09-09   
423-819 7 Cleveland TN   124F BANDWIDTH.COM CLEC, LLC - TN 472   2023-03-06   
423-819 8 Cleveland TN   124F BANDWIDTH.COM CLEC, LLC - TN 472   2023-03-06   

<< 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 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.