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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-910 1 Ooltewah TN CHTGTNNSXRZ  318J COMCAST IP PHONE, LLC 472   2008-10-30   
423-910 2 Ooltewah TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-03-15   
423-910 3 Ooltewah TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472   2018-07-11   
423-910 4 Ooltewah TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2019-09-01   
423-910 5 Ooltewah TN CHTGTNNSXRZ  318J COMCAST IP PHONE, LLC 472   2015-03-26   
423-910 6 Ooltewah TN CHTGTNNSXEY  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 472   2014-06-06   
423-910 8 Ooltewah TN CHTGTNNSXGZ  204G TWIN LAKES COMMUNICATIONS, INC. - TN 472   2020-11-23   
423-910 9 Ooltewah TN CHTGTNNSXFY  124F BANDWIDTH.COM CLEC, LLC - TN 472   2008-11-28   
423-912 A La Follette TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-912 0 La Follette TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-912 1 La Follette TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-912 2 La Follette TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2004-04-03   
423-912 3 La Follette TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2004-11-05   
423-912 4 La Follette TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2004-11-05   
423-912 5 La Follette TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2005-08-12   
423-912 6 La Follette TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2005-08-12   
423-912 7 La Follette TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2006-04-17   
423-912 8 La Follette TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-912 9 La Follette TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2006-04-17   
423-913 A Jonesboro TN JNBOTNXARP0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-913 0 Jonesboro TN JNBOTNXARP0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-913 1 Jonesboro TN JNBOTNXARP0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-913 2 Jonesboro TN JNBOTNXARP0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-913 3 Jonesboro TN JNBOTNXARP0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-913 4 Jonesboro TN JHCYTNXCXHY  318J COMCAST IP PHONE, LLC 956   2011-08-18   
423-913 5 Jonesboro TN JNBOTNXARP0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-913 7 Jonesboro TN JHCYTNXCYZZ  829J PAETEC ITEL, LLC 956   2014-08-30   
423-913 8 Jonesboro TN JNBOTNXARP0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-913 9 Jonesboro TN JHCYTNXCXPY  624H ONVOY SPECTRUM, LLC 956   2023-04-27   
423-914 A Bristol TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-915 A Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-915 0 Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-915 1 Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-915 2 Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-915 3 Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-915 4 Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-915 5 Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-915 6 Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2009-04-05   
423-915 7 Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-915 8 Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-915 9 Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2012-11-03   
423-916 A Johnson City TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2025-01-25  2025-11-30 
423-917 A Blountville TN BUVLTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-918 A Oneida TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2025-02-08   
423-918 8 Oneida TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2025-02-08   
423-918 9 Oneida TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2025-02-08   
423-919 A New Tazewell TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-919 0 New Tazewell TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2023-09-29   
423-919 1 New Tazewell TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2021-03-19   
423-919 2 New Tazewell TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2021-03-19   
423-919 3 New Tazewell TN   7476 POWERTEL NASHVILLE LICENSES, INC. 474   2025-04-11   
423-919 4 New Tazewell TN   7476 POWERTEL NASHVILLE LICENSES, INC. 474   2025-07-03   
423-919 5 New Tazewell TN   5562 METROPCS, INC. 474   2025-04-11   
423-919 6 New Tazewell TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2024-08-02   
423-919 7 New Tazewell TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2024-08-02   
423-919 8 New Tazewell TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2019-11-29   
423-919 9 New Tazewell TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2019-11-29   
423-920 A Athens TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-920 0 Athens TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-920 1 Athens TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-920 2 Athens TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2006-08-19   
423-920 3 Athens TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2008-10-28   
423-920 4 Athens TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2005-08-14   
423-920 5 Athens TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2006-07-21   
423-920 6 Athens TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2008-11-02   
423-920 7 Athens TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2005-04-22   
423-920 8 Athens TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-920 9 Athens TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-921 A Rogersville TN RRVLTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-921 0 Rogersville TN RRVLTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-921 1 Rogersville TN RRVLTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-921 2 Rogersville TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474      
423-921 3 Rogersville TN RRVLTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-921 4 Rogersville TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474      
423-921 5 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2018-03-09   
423-921 6 Rogersville TN RRVLTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-921 7 Rogersville TN RRVLTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-921 8 Rogersville TN RRVLTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-921 9 Rogersville TN RRVLTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-922 A Baileyton TN JHCYTNXCXGY  965H FRACTEL, LLC 956      
423-922 0 Baileyton TN JHCYTNXCXAY  073H TELNYX LLC 956   2021-01-17   
423-922 2 Baileyton TN JHCYTNXCXGY  965H FRACTEL, LLC 956   2020-09-12   
423-922 3 Baileyton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-02-17   
423-922 4 Baileyton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-02-17   
423-922 5 Baileyton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-07-10   
423-922 6 Baileyton TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2021-07-10   
423-922 7 Baileyton TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2021-12-09   
423-922 8 Baileyton TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2022-02-26   
423-922 9 Baileyton TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2022-03-20   
423-923 A Rogersville TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-923 0 Rogersville TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-923 1 Rogersville TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-923 2 Rogersville TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-923 3 Rogersville TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2005-07-18   
423-923 4 Rogersville TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-923 5 Rogersville TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2007-04-21   
423-923 6 Rogersville TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2007-09-17   
423-923 7 Rogersville TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2006-09-17   
423-923 8 Rogersville TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474      
423-923 9 Rogersville TN KNVLTNJHGT0  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2008-12-06   

<< 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 >>

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.