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.

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: Mon, 15 Sep 2025 02:24:40 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.