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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-564 4 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2019-06-09   
423-564 5 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2019-06-09   
423-564 6 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2019-06-09   
423-564 7 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2019-11-18   
423-564 8 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2021-01-14   
423-564 9 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2022-05-15   
423-565 A Decatur TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472      
423-565 0 Decatur TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2018-11-01   
423-565 1 Decatur TN CHTGTNNSXGZ  204G TWIN LAKES COMMUNICATIONS, INC. - TN 472   2019-03-07   
423-565 2 Decatur TN CHTGTNNSXJZ  073H TELNYX LLC 472   2021-01-23   
423-565 3 Decatur TN CHTITNCDDS0  4645 ELECTRIC POWER BOARD OF CHATTANOOGA 472   2020-02-24   
423-565 4 Decatur TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2022-12-02   
423-565 5 Decatur TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-03-15   
423-565 6 Decatur TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-03-15   
423-565 8 Decatur TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-01-11   
423-565 9 Decatur TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-01-11   
423-566 A La Follette TN LFLTTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-567 A Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-567 0 Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2009-01-17   
423-567 1 Dayton TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2010-06-19   
423-567 2 Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2009-11-06   
423-567 3 Dayton TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2010-09-25   
423-567 4 Dayton TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2011-02-21   
423-567 5 Dayton TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2011-04-08   
423-567 6 Dayton TN CHTGTNMAXVX  516C AT&T CORP. 472   2010-03-19   
423-567 7 Dayton TN CHTGTNNSXEY  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 472   2013-03-01   
423-567 8 Dayton TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2016-08-22   
423-567 9 Dayton TN CHTGTNNSXJZ  073H TELNYX LLC 472   2021-01-23   
423-568 A Niota TN NIOTTNXARP0  0578 TELLICO TEL. CO., INC. 474      
423-568 0 Niota TN NIOTTNXARP0  0578 TELLICO TEL. CO., INC. 474      
423-568 1 Niota TN KNVLTNMAYBX  204G TWIN LAKES COMMUNICATIONS, INC. - TN 474   2022-12-30   
423-568 2 Niota TN NIOTTNXARP0  0578 TELLICO TEL. CO., INC. 474      
423-568 3 Niota TN NIOTTNXARP0  0578 TELLICO TEL. CO., INC. 474      
423-568 4 Niota TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2023-02-24   
423-568 5 Niota TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2020-01-02   
423-568 8 Niota TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2021-05-22   
423-568 9 Niota TN MRTWTN281MD  792K CHARTER IP ENABLED SERVICES, LLC 474   2023-09-10   
423-569 A Oneida TN ONEDTNXADS1  0565 HIGHLAND TEL. COOP, INC. 474      
423-570 A Dayton TN DYTNTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-570 0 Dayton TN DYTNTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-570 1 Dayton TN DYTNTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-570 2 Dayton TN DYTNTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-570 3 Dayton TN DYTNTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-570 4 Dayton TN DYTNTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-570 6 Dayton TN DYTNTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-570 7 Dayton TN DYTNTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-570 8 Dayton TN DYTNTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-570 9 Dayton TN DYTNTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-571 A Midway (Sullivan) TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-572 A Englewood TN KNVLTNMA31Z  6278 UNITED STATES CELLULAR - TN 474      
423-572 0 Englewood TN KNVLTNMA31Z  6278 UNITED STATES CELLULAR - TN 474      
423-572 1 Englewood TN KNVLTNMA31Z  6278 UNITED STATES CELLULAR - TN 474      
423-572 2 Englewood TN KNVLTNMA31Z  6278 UNITED STATES CELLULAR - TN 474      
423-572 4 Englewood TN KNVLTNMAYAY  829J PAETEC ITEL, LLC 474   2010-09-07   
423-572 6 Englewood TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2021-10-25   
423-573 A Bristol TN BRSTTN27DS0  895D BRISTOL TENNESSEE ESSENTIAL SERVICES - TN 956      
423-574 A Blountville TN BRSTTN27DS0  895D BRISTOL TENNESSEE ESSENTIAL SERVICES - TN 956      
423-575 A Bluff City TN BRSTTN27DS0  895D BRISTOL TENNESSEE ESSENTIAL SERVICES - TN 956      
423-576 A Elizabethton TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-576 0 Elizabethton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2023-09-09   
423-576 1 Elizabethton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2023-09-09   
423-576 2 Elizabethton TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2023-09-22   
423-576 3 Elizabethton TN JHCYTNXCX9Y  081J SKYBEST COMMUNICATIONS, INC. - TN 956   2024-08-25   
423-576 4 Elizabethton TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2024-03-01   
423-576 5 Elizabethton TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2024-03-01   
423-576 6 Elizabethton TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2024-03-01   
423-576 8 Elizabethton TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2023-08-19   
423-576 9 Elizabethton TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2023-08-19   
423-577 A Oneida TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-577 0 Oneida TN KNVLTNMAYHX  318J COMCAST IP PHONE, LLC 474   2023-09-01   
423-577 1 Oneida TN KNVLTNMAYBX  204G TWIN LAKES COMMUNICATIONS, INC. - TN 474   2019-07-18   
423-577 2 Oneida TN KNVLTNMA96Z  5562 METROPCS, INC. 474   2021-05-07   
423-577 3 Oneida TN KNVLTNMA96Z  7476 POWERTEL NASHVILLE LICENSES, INC. 474   2024-03-21   
423-577 4 Oneida TN KNVLTNMA96Z  7476 POWERTEL NASHVILLE LICENSES, INC. 474   2024-03-21   
423-577 5 Oneida TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2024-03-23   
423-577 6 Oneida TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2023-02-13   
423-577 7 Oneida TN KNVLTNEC0MD  965H FRACTEL, LLC 474   2020-08-08   
423-577 8 Oneida TN KNVLTNMANMD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 474   2021-10-03   
423-577 9 Oneida TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2017-05-24   
423-578 A Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-578 0 Kingsport TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2007-08-31   
423-578 1 Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-578 2 Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-578 3 Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-578 4 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2009-02-05   
423-578 5 Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-578 6 Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-578 7 Kingsport TN GTCYVA02AMD  008A MOUNTAINET TELEPHONE COMPANY - TN 956   2003-08-25   
423-578 8 Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-578 9 Kingsport TN KGPTTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-579 A Kingsport TN GTCYVA020MD  3185 MOUNTAINET TELEPHONE COMPANY - VA 956      
423-579 0 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2009-12-16   
423-579 1 Kingsport TN GTCYVA020MD  008A MOUNTAINET TELEPHONE COMPANY - TN 956   2009-04-06   
423-579 2 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2009-12-16   
423-579 3 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2010-02-05   
423-579 4 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2010-03-12   
423-579 5 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2010-03-12   
423-579 6 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2010-03-12   
423-579 7 Kingsport TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956   2011-01-28   
423-579 8 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2010-07-04   

<< 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 >>

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.