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: NWORLASD8MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
504-389 A New Orleans LA 321J HD CARRIER LLC 490      
504-389 8 New Orleans LA 321J HD CARRIER LLC 490   2021-12-03   
504-389 9 New Orleans LA 321J HD CARRIER LLC 490   2021-12-03   
985-426 7 Houma LA 321J HD CARRIER LLC 490   2026-07-02   
985-543 5 Hammond LA 321J HD CARRIER LLC 490   2026-07-02   
985-543 7 Hammond LA 321J HD CARRIER LLC 490   2026-07-02   
985-549 9 Hammond LA 321J HD CARRIER LLC 490   2026-07-02   
985-857 1 Houma LA 321J HD CARRIER LLC 490   2026-07-02   
985-857 6 Houma LA 321J HD CARRIER LLC 490   2026-07-14   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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