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.
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Switch: MRTWTNMADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
423-317 A Morristown TN 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-318 A Morristown TN 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-492 A Morristown TN 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-522 A Morristown TN 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-581 A Morristown TN 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-585 A Morristown TN 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-586 A Morristown TN 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
423-587 A Morristown TN 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      
865-993 A Bean Station TN 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 474      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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