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
423-666 0 Elizabethton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2019-07-10   
423-666 1 Elizabethton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2019-07-10   
423-666 2 Elizabethton TN JHCYTNXCXAY  073H TELNYX LLC 956   2021-01-23   
423-666 3 Elizabethton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2023-02-10   
423-666 4 Elizabethton TN JHCYTNXCXPY  624H ONVOY SPECTRUM, LLC 956   2023-04-27   
423-666 5 Elizabethton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-07-10   
423-666 6 Elizabethton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2018-06-16   
423-666 7 Elizabethton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2019-06-23   
423-666 8 Elizabethton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2018-06-16   
423-666 9 Elizabethton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2019-07-10   
423-667 A Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-668 A Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-668 0 Chattanooga TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2012-10-20   
423-668 1 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2023-12-14   
423-668 2 Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-668 3 Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-668 4 Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-668 5 Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-668 6 Chattanooga TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2012-10-20   
423-668 7 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2023-12-14   
423-668 8 Chattanooga TN CHTGTNNSXRZ  318J COMCAST IP PHONE, LLC 472   2012-12-21   
423-668 9 Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-669 A Benton TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472      
423-669 2 Benton TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2023-10-14   
423-670 A Johnson City TN JHCYTNXCXJY  515J IP HORIZON LLC 956      
423-670 0 Johnson City TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2023-03-11   
423-670 1 Johnson City TN   515J IP HORIZON LLC 956   2020-11-14   
423-670 2 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2021-05-17   
423-670 3 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2021-05-17   
423-670 4 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2021-05-17   
423-670 5 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2021-05-17   
423-670 6 Johnson City TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-01-06   
423-670 7 Johnson City TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-01-06   
423-670 8 Johnson City TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2023-02-26   
423-670 9 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2021-12-18   
423-671 A Chattanooga TN CHTGTNNSXSZ  515J IP HORIZON LLC 472      
423-671 1 Chattanooga TN   515J IP HORIZON LLC 472   2020-11-20   
423-671 6 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2021-09-19   
423-671 7 Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472   2022-09-23   
423-672 A Johnson City TN JHCYTNXCXAY  073H TELNYX LLC 956      
423-672 0 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2022-12-10   
423-672 1 Johnson City TN JHCYTNXCXAY  073H TELNYX LLC 956   2020-02-17   
423-672 2 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2021-05-17   
423-672 3 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2021-05-17   
423-672 4 Johnson City TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-05-22   
423-672 5 Johnson City TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-05-22   
423-672 6 Johnson City TN JHCYTNXCXPY  624H ONVOY SPECTRUM, LLC 956   2021-10-08   
423-672 7 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2022-12-10   
423-672 8 Johnson City TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956   2022-02-07   
423-672 9 Johnson City TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956   2022-02-07   

<< 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: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.