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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-722 1 Johnson City TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-722 2 Johnson City TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-722 3 Johnson City TN   792K CHARTER IP ENABLED SERVICES, LLC 956      
423-722 4 Johnson City TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-722 5 Johnson City TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-722 6 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-722 7 Johnson City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-722 8 Johnson City TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-722 9 Johnson City TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-723 A Kingsport TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-723 0 Kingsport TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-723 1 Kingsport TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-723 2 Kingsport TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-723 3 Kingsport TN JHCYTNXCX2Y  5562 METROPCS, INC. 956      
423-723 4 Kingsport TN JHCYTNXCX2Y  5562 METROPCS, INC. 956      
423-723 5 Kingsport TN JHCYTNXCX2Y  5562 METROPCS, INC. 956      
423-723 6 Kingsport TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-723 7 Kingsport TN JHCYTNXCX2Y  5562 METROPCS, INC. 956      
423-723 8 Kingsport TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956      
423-723 9 Kingsport TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956      
423-724 A Sneedville TN   829J PAETEC ITEL, LLC 474   2024-12-07   
423-724 3 Sneedville TN KNVNTNEC6MD  516J TON80 COMMUNICATIONS, LLC 474      
423-724 4 Sneedville TN   829J PAETEC ITEL, LLC 474      
423-724 5 Sneedville TN   829J PAETEC ITEL, LLC 474      
423-724 6 Sneedville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-724 7 Sneedville TN KNVLTNMA56Z  124F BANDWIDTH.COM CLEC, LLC - TN 474      
423-724 8 Sneedville TN KNVLTNMA56Z  124F BANDWIDTH.COM CLEC, LLC - TN 474      
423-724 9 Sneedville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-725 A Hampton TN HMPNTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-726 A Midway (Sullivan) TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-726 1 Midway (Sullivan) TN JHCYTNXCXAY  073H TELNYX LLC 956      
423-726 2 Midway (Sullivan) TN   792K CHARTER IP ENABLED SERVICES, LLC 956      
423-726 3 Midway (Sullivan) TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956      
423-726 5 Midway (Sullivan) TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956      
423-726 6 Midway (Sullivan) TN JHCYTNXCXRX  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 956      
423-726 7 Midway (Sullivan) TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956      
423-726 9 Midway (Sullivan) TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956      
423-727 A Mountain City TN MTCYTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-728 A Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-728 0 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-728 1 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-728 2 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-728 3 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-728 4 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-728 5 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-728 6 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-728 7 Cleveland TN CLEVTNMADS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-728 8 Cleveland TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472      
423-728 9 Cleveland TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472      
423-729 A Fall Creek Falls TN   704C CHARTER FIBERLINK-TENNESSEE, LLC - TN 472   2024-11-10   
423-729 1 Fall Creek Falls TN   704C CHARTER FIBERLINK-TENNESSEE, LLC - TN 472      
423-730 A Riceville TN KNVLTNMAYHX  318J COMCAST IP PHONE, LLC 474      
423-730 0 Riceville TN KNVLTNMAYHX  318J COMCAST IP PHONE, LLC 474      
423-730 1 Riceville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-730 2 Riceville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-730 3 Riceville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-730 5 Riceville TN   792K CHARTER IP ENABLED SERVICES, LLC 474      
423-730 8 Riceville TN KNVLTNMAYBX  204G TWIN LAKES COMMUNICATIONS, INC. - TN 474      
423-730 9 Riceville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-732 A Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-732 0 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-732 1 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-732 2 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-732 3 Kingsport TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956      
423-732 4 Kingsport TN JHCYTNXCX2Y  5562 METROPCS, INC. 956      
423-732 5 Kingsport TN JHCYTNXCX2Y  5562 METROPCS, INC. 956      
423-732 6 Kingsport TN JHCYTNXCXRX  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 956      
423-732 7 Kingsport TN   792K CHARTER IP ENABLED SERVICES, LLC 956      
423-732 8 Kingsport TN JHCYTNXCXAY  073H TELNYX LLC 956      
423-732 9 Kingsport TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-733 A Sneedville TN SNVLTNMARS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-733 0 Sneedville TN SNVLTNMARS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-733 1 Sneedville TN SNVLTNMARS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-733 2 Sneedville TN SNVLTNMARS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-733 3 Sneedville TN KNVNTNEC5MD  145J TERRA NOVA TELECOM INC. 474      
423-733 4 Sneedville TN SNVLTNMARS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-733 5 Sneedville TN SNVLTNMARS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-733 6 Sneedville TN SNVLTNMARS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-733 8 Sneedville TN SNVLTNMARS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-733 9 Sneedville TN SNVLTNMARS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-734 A Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-734 0 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-734 1 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-734 2 Rogersville TN KNVLTNMA88Z  5562 METROPCS, INC. 474      
423-734 3 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-734 4 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-734 5 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-734 6 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-734 7 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-734 8 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-734 9 Rogersville TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-735 A Erwin TN ERWNTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-735 0 Erwin TN ERWNTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-735 1 Erwin TN ERWNTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-735 2 Erwin TN   829J PAETEC ITEL, LLC 956      
423-735 3 Erwin TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956      
423-735 4 Erwin TN ERWNTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-735 5 Erwin TN ERWNTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-735 6 Erwin TN JHCYTNXCX3X  7278 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 956      
423-735 7 Erwin TN ERWNTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      

<< 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 >>

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.