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: 317

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
504-317 A Kenner LA NWORLAMTX6Y  150C VOICESTREAM GSM I, LLC 490      
504-317 0 Kenner LA NWORLAMTX6Y  150C VOICESTREAM GSM I, LLC 490   2011-05-02   
504-317 1 Kenner LA NWORLAMA46Z  749E ONVOY, LLC - LA 490   2024-05-03   
504-317 2 Kenner LA NWORLAMTX6Y  150C VOICESTREAM GSM I, LLC 490   2021-01-21   
504-317 3 Kenner LA MNVLLA20G07  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 490   2025-02-03   
504-317 4 Kenner LA MNVLLA20G07  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 490   2025-02-03   
504-317 5 Kenner LA MNVLLA20G07  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 490   2025-02-03   
504-317 6 Kenner LA NWORLAMA46Z  749E ONVOY, LLC - LA 490   2025-10-26   
504-317 8 Kenner LA NWORLAMA46Z  749E ONVOY, LLC - LA 490   2024-05-03   
504-317 9 Kenner LA NWORLAMA46Z  749E ONVOY, LLC - LA 490   2024-05-03   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.