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: CASTLAMARS2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
318-544 A Castor LA 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 486      
318-544 0 Castor LA 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 486      
318-544 2 Castor LA 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 486      
318-544 7 Castor LA 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 486      
318-544 8 Castor LA 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 486      
318-544 9 Castor LA 9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 486      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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