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: 504 [Rate centres in NPA 504] [Dial plan for NPA 504]

NXX: 404

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
504-404 A New Orleans LA   558H WIDE VOICE, LLC - LA 490   2026-11-12   
504-404 1 New Orleans LA   558H WIDE VOICE, LLC - LA 490   2026-11-12   
504-404 4 New Orleans LA   558H WIDE VOICE, LLC - LA 490   2026-11-12   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.