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 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 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-405 7 Athens TN KNVLTNMA56Z  124F BANDWIDTH.COM CLEC, LLC - TN 474   2014-12-01   
423-405 8 Athens TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2014-12-18   
423-405 9 Athens TN   7476 POWERTEL NASHVILLE LICENSES, INC. 474   2011-05-28   
423-406 A Midway (Sullivan) TN JHCYTNXCXHY  318J COMCAST IP PHONE, LLC 956      
423-406 0 Midway (Sullivan) TN JHCYTNXCXHY  318J COMCAST IP PHONE, LLC 956   2008-05-17   
423-406 1 Midway (Sullivan) TN BUVLTNAXPS1  704C CHARTER FIBERLINK-TENNESSEE, LLC - TN 956   2008-05-18   
423-406 2 Midway (Sullivan) TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2010-09-09   
423-406 3 Midway (Sullivan) TN JHCYTNXCX3X  7278 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 956   2010-06-10   
423-406 4 Midway (Sullivan) TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2015-06-13   
423-406 5 Midway (Sullivan) TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2016-08-26   
423-406 6 Midway (Sullivan) TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2018-06-09   
423-406 8 Midway (Sullivan) TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2018-08-25   
423-406 9 Midway (Sullivan) TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2019-01-11   
423-407 A Spring City TN CHTGTNNSXGZ  204G TWIN LAKES COMMUNICATIONS, INC. - TN 472      
423-407 0 Spring City TN CHTGTNNSXJZ  073H TELNYX LLC 472   2021-01-23   
423-407 1 Spring City TN CHTGTNNSXGZ  204G TWIN LAKES COMMUNICATIONS, INC. - TN 472   2020-03-13   
423-407 2 Spring City TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-07-11   
423-407 3 Spring City TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-07-11   
423-407 4 Spring City TN CHTGTNNSXTZ  506J TWILIO INTERNATIONAL, INC. 472   2021-08-08   
423-407 5 Spring City TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-10-24   
423-407 6 Spring City TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2022-01-10   
423-407 7 Spring City TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-03-15   
423-407 8 Spring City TN CHTITNCDDS0  4645 ELECTRIC POWER BOARD OF CHATTANOOGA 472   2020-03-14   
423-407 9 Spring City TN CHTGTNNSXMZ  624H ONVOY SPECTRUM, LLC 472   2023-06-17   
423-408 A Kingsport TN JHCYTNXCXRX  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 956      
423-408 0 Kingsport TN JHCYTNXCX2Y  5562 METROPCS, INC. 956   2010-03-31   
423-408 1 Kingsport TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956   2010-04-29   
423-408 2 Kingsport TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2010-09-06   
423-408 3 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2011-01-19   
423-408 4 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2011-01-19   
423-408 6 Kingsport TN JHCYTNXCXRX  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 956   2009-12-21   
423-408 7 Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956   2010-08-31   
423-408 8 Kingsport TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2010-03-08   
423-408 9 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2011-04-08   
423-409 A Bulls Gap TN KNVLTNMA78Z  6630 USA MOBILITY WIRELESS, INC. 474      
423-410 A Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-412 A Johnson City TN JHCYTNXCXNX  6630 USA MOBILITY WIRELESS, INC. 956      
423-413 A Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-414 A Chattanooga TN CHTHTNPWDS0  967F PEACE COMMUNICATIONS, LLC - TN 472      
423-414 0 Chattanooga TN CHTHTNPWDS0  967F PEACE COMMUNICATIONS, LLC - TN 472   2010-05-23   
423-414 1 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2011-06-10   
423-414 2 Chattanooga TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2012-03-22   
423-414 3 Chattanooga TN CHTGTN12X8X  7278 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 472   2011-01-28   
423-414 4 Chattanooga TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2011-10-13   
423-414 5 Chattanooga TN CHTGTNOXZMD  5562 METROPCS, INC. 472   2011-03-25   
423-414 6 Chattanooga TN CHTGTNOXZMD  5562 METROPCS, INC. 472   2011-03-25   
423-414 7 Chattanooga TN CHTGTNOXZMD  5562 METROPCS, INC. 472   2011-03-25   
423-414 8 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2011-08-06   
423-414 9 Chattanooga TN CHTGTNNSXNY  271E RTC SOLUTIONS, INC. - GA 472   2012-04-14   
423-415 A Newport TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474      

<< 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 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 >>

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.