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
423-617 5 Athens TN KNVLTNWHX6X  7476 POWERTEL NASHVILLE LICENSES, INC. 474   2014-09-14   
423-617 6 Athens TN KNVLTNWHX6X  7476 POWERTEL NASHVILLE LICENSES, INC. 474   2014-09-14   
423-617 8 Athens TN KNVLTNWHX6X  7476 POWERTEL NASHVILLE LICENSES, INC. 474   2014-09-14   
423-617 9 Athens TN KNVLTNWHX6X  7476 POWERTEL NASHVILLE LICENSES, INC. 474   2013-12-02   
423-618 A Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-619 A Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-620 A Greeneville TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-620 0 Greeneville TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-620 1 Greeneville TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-620 2 Greeneville TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-620 3 Greeneville TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2005-09-29   
423-620 4 Greeneville TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2004-11-06   
423-620 5 Greeneville TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2004-12-05   
423-620 6 Greeneville TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2004-12-19   
423-620 7 Greeneville TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2005-01-03   
423-620 8 Greeneville TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2005-05-06   
423-620 9 Greeneville TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-621 A Morristown TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474      
423-621 0 Morristown TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2016-10-29   
423-621 1 Morristown TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2017-01-07   
423-621 2 Morristown TN KNVLTNMA56Z  124F BANDWIDTH.COM CLEC, LLC - TN 474   2019-05-11   
423-621 3 Morristown TN KNVLTNMA56Z  124F BANDWIDTH.COM CLEC, LLC - TN 474   2019-05-11   
423-621 4 Morristown TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2018-03-14   
423-621 5 Morristown TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2019-05-24   
423-621 6 Morristown TN KNVLTNMA56Z  124F BANDWIDTH.COM CLEC, LLC - TN 474   2019-06-16   
423-621 7 Morristown TN KNVLTNMA96Z  5562 METROPCS, INC. 474   2021-05-07   
423-621 8 Morristown TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2018-08-23   
423-621 9 Morristown TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2018-08-23   
423-622 A Chattanooga TN CHTGTNDTDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-623 A Newport TN NWPTTNMTDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-624 A Chattanooga TN CHTGTNDTDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-625 A Newport TN NWPTTNMTDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-626 A New Tazewell TN NWTZTNXADS1  0557 BRIGHTSPEED OF EASTERN TENNESSEE, LLC 474      
423-627 A Robbins TN RBNSTNXARS0  0565 HIGHLAND TEL. COOP, INC. 474      
423-627 0 Robbins TN RBNSTNXARS0  0565 HIGHLAND TEL. COOP, INC. 474      
423-627 1 Robbins TN RBNSTNXARS0  0565 HIGHLAND TEL. COOP, INC. 474      
423-627 2 Robbins TN RBNSTNXARS0  0565 HIGHLAND TEL. COOP, INC. 474      
423-627 3 Robbins TN RBNSTNXARS0  0565 HIGHLAND TEL. COOP, INC. 474      
423-627 4 Robbins TN RBNSTNXARS0  0565 HIGHLAND TEL. COOP, INC. 474      
423-627 5 Robbins TN RBNSTNXARS0  0565 HIGHLAND TEL. COOP, INC. 474      
423-627 6 Robbins TN RBNSTNXARS0  0565 HIGHLAND TEL. COOP, INC. 474      
423-627 7 Robbins TN KNVLTNMA31Z  6278 UNITED STATES CELLULAR - TN 474      
423-627 8 Robbins TN RBNSTNXARS0  0565 HIGHLAND TEL. COOP, INC. 474      
423-627 9 Robbins TN RBNSTNXARS0  0565 HIGHLAND TEL. COOP, INC. 474      
423-628 A Sunbright TN SNBRTNXARS0  0565 HIGHLAND TEL. COOP, INC. 474      
423-629 A Chattanooga TN CHTGTNDTDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-630 A Johnson City TN JHCYTNXCNMD  239E TELESCAN, INC. - TN 956      
423-631 A Johnson City TN BUVLTNAX0MD  792K CHARTER IP ENABLED SERVICES, LLC 956      
423-631 0 Johnson City TN BUVLTNAX0MD  792K CHARTER IP ENABLED SERVICES, LLC 956   2008-05-23   
423-631 1 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2008-12-06   
423-631 2 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2008-12-06   
423-631 3 Johnson City TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2011-05-26   
423-631 4 Johnson City TN JHCYTNXCXPY  624H ONVOY SPECTRUM, LLC 956   2024-01-05   
423-631 5 Johnson City TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2011-05-26   
423-631 6 Johnson City TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956   2011-05-18   
423-631 7 Johnson City TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956   2011-05-18   
423-631 8 Johnson City TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956   2011-05-18   
423-631 9 Johnson City TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956   2011-05-18   
423-632 A Wartburg TN KNVLTNMAYBX  204G TWIN LAKES COMMUNICATIONS, INC. - TN 474      
423-632 1 Wartburg TN KNVLTNMAYBX  204G TWIN LAKES COMMUNICATIONS, INC. - TN 474   2019-08-15   
423-632 2 Wartburg TN KNVLTNMAYHX  318J COMCAST IP PHONE, LLC 474   2023-08-27   
423-632 7 Wartburg TN KNVLTNMANMD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 474   2021-10-03   
423-633 A Chattanooga TN CHTGTNNSXJZ  073H TELNYX LLC 472      
423-633 0 Chattanooga TN CHTGTNNSXMZ  624H ONVOY SPECTRUM, LLC 472   2022-06-12   
423-633 1 Chattanooga TN CHTGTNNSXJZ  073H TELNYX LLC 472   2020-02-07   
423-633 2 Chattanooga TN CHTGTNNSXMZ  624H ONVOY SPECTRUM, LLC 472   2022-03-19   
423-633 3 Chattanooga TN CHTGTNNSXMZ  624H ONVOY SPECTRUM, LLC 472   2022-03-19   
423-633 4 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2020-05-04   
423-633 5 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2020-05-04   
423-633 6 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2020-05-04   
423-633 7 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2020-05-04   
423-633 8 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2020-05-04   
423-633 9 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2020-05-04   
423-634 A Chattanooga TN CHTGTNNSDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-635 A Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-635 0 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-635 1 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-635 2 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2012-11-03   
423-635 3 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2012-11-03   
423-635 4 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-635 5 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-635 6 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-635 7 Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472   2014-03-28   
423-635 8 Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-635 9 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2014-05-08   
423-636 A Greeneville TN GRVLTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-637 A Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-637 0 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2008-08-15   
423-637 1 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2008-08-18   
423-637 2 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2008-08-18   
423-637 3 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2008-08-18   
423-637 4 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2008-08-16   
423-637 5 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2008-08-16   
423-637 6 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2008-10-04   
423-637 7 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2010-07-04   
423-637 8 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2008-12-12   
423-637 9 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2008-08-15   
423-638 A Greeneville TN GRVLTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-639 A Greeneville TN GRVLTNXADS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-640 A Sneedville TN KNVLTNMAYGX  7421 AT&T - LOCAL 474      

<< 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, 01 Jun 2025 02:18:11 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.