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
423-480 1 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2013-02-22   
423-480 2 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2013-10-03   
423-480 3 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2013-10-03   
423-480 4 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2012-11-02   
423-480 5 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2013-11-19   
423-480 6 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2014-03-08   
423-480 7 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2014-03-20   
423-480 8 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2014-03-20   
423-480 9 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2012-04-12   
423-481 A Roan Mountain TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956      
423-481 0 Roan Mountain TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2011-10-30   
423-481 1 Roan Mountain TN BUVLTNAXPS1  704C CHARTER FIBERLINK-TENNESSEE, LLC - TN 956   2014-06-28   
423-481 2 Roan Mountain TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2017-03-12   
423-481 3 Roan Mountain TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2018-06-09   
423-481 4 Roan Mountain TN JHCYTNXCXRX  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 956   2017-08-11   
423-481 5 Roan Mountain TN JHCYTNXCXAY  073H TELNYX LLC 956   2021-01-23   
423-481 6 Roan Mountain TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-02-17   
423-481 7 Roan Mountain TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956   2014-04-19   
423-481 8 Roan Mountain TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2019-06-06   
423-481 9 Roan Mountain TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2019-06-06   
423-482 A Blountville TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-482 0 Blountville TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-482 1 Blountville TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2017-05-29   
423-482 2 Blountville TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2017-05-29   
423-482 3 Blountville TN JHCYTNXCX2Y  5562 METROPCS, INC. 956   2018-03-12   
423-482 4 Blountville TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2018-06-09   
423-482 5 Blountville TN JHCYTNXCX2Y  5562 METROPCS, INC. 956   2019-01-19   
423-482 6 Blountville TN JHCYTNXCXRX  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 956   2011-06-20   
423-482 7 Blountville TN JHCYTNXCXRX  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 956   2017-07-13   
423-482 8 Blountville TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2019-06-06   
423-482 9 Blountville TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2019-06-06   
423-483 A Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-483 0 Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-483 1 Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2003-08-18   
423-483 2 Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2003-08-18   
423-483 3 Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2003-08-18   
423-483 4 Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2003-08-18   
423-483 5 Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2003-08-18   
423-483 6 Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2003-08-18   
423-483 7 Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2003-08-18   
423-483 8 Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2003-08-18   
423-483 9 Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2005-10-23   
423-484 A Bristol TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-484 0 Bristol TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-484 1 Bristol TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2008-12-06   
423-484 2 Bristol TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2009-01-16   
423-484 3 Bristol TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2009-01-02   
423-484 4 Bristol TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2009-02-13   
423-484 5 Bristol TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2009-03-06   
423-484 6 Bristol TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2009-03-21   

<< 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: Execulink Telecom

Like this site? We accept donations via PayPal.