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
423-471 0 Mountain City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-471 1 Mountain City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-471 2 Mountain City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-471 3 Mountain City TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2022-12-23   
423-471 4 Mountain City TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2022-09-29   
423-471 5 Mountain City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-471 6 Mountain City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-471 7 Mountain City TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2020-07-07   
423-471 8 Mountain City TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2020-07-07   
423-471 9 Mountain City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-472 A Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-473 A Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-473 0 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-473 1 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-473 2 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-473 3 Cleveland TN   792K CHARTER IP ENABLED SERVICES, LLC 472   2015-05-03   
423-473 4 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-473 5 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-473 6 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-473 7 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-473 8 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-473 9 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-474 A Stoney Creek TN STCKTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-475 A Chattanooga TN CHTGTNNSXCZ  7473 POWERTEL ATLANTA LICENSES, INC. 472      
423-475 0 Chattanooga TN CHTGTNNSXCZ  7473 POWERTEL ATLANTA LICENSES, INC. 472   2008-07-05   
423-475 1 Chattanooga TN CHTGTNNSXCZ  7473 POWERTEL ATLANTA LICENSES, INC. 472   2011-06-07   
423-475 2 Chattanooga TN CHTGTNNSXCZ  7473 POWERTEL ATLANTA LICENSES, INC. 472   2011-06-07   
423-475 3 Chattanooga TN CHTGTNNSXCZ  7473 POWERTEL ATLANTA LICENSES, INC. 472   2011-06-07   
423-475 4 Chattanooga TN CHTGTNNSXCZ  7473 POWERTEL ATLANTA LICENSES, INC. 472   2011-06-07   
423-475 5 Chattanooga TN CHTGTNNSXRZ  318J COMCAST IP PHONE, LLC 472   2008-03-25   
423-475 6 Chattanooga TN CHTGTNNSXRZ  318J COMCAST IP PHONE, LLC 472   2008-03-25   
423-475 7 Chattanooga TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2009-10-02   
423-475 8 Chattanooga TN CHTITNCDDS0  4645 ELECTRIC POWER BOARD OF CHATTANOOGA 472   2008-11-03   
423-475 9 Chattanooga TN CHTGTNNSXCZ  7473 POWERTEL ATLANTA LICENSES, INC. 472   2007-12-21   
423-476 A Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-477 A Midway (Washington) TN MDWYTNXARS2  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-478 A Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-479 A Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-480 A Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-480 0 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2012-12-18   
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 BUVLTNAX0MD  792K CHARTER IP ENABLED SERVICES, LLC 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   
423-484 7 Bristol TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2009-03-21   
423-484 8 Bristol TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2010-06-19   
423-484 9 Bristol TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2009-05-08   
423-485 A Chattanooga TN CHTGTNBRDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-485 0 Chattanooga TN CHTGTNBRDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-485 1 Chattanooga TN CHTGTNBRDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-485 2 Chattanooga TN CHTGTNBRDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-485 3 Chattanooga TN CHTGTNNSXRZ  318J COMCAST IP PHONE, LLC 472   2012-04-21   
423-485 4 Chattanooga TN CHTGTNBRDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-485 5 Chattanooga TN CHTGTNBRDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      

<< 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: VoIP.ms

Like this site? We accept donations via PayPal.