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: 305

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
504-305 A Kenner LA NWORLAMAYIX  318J COMCAST IP PHONE, LLC 490      
504-305 0 Kenner LA   318J COMCAST IP PHONE, LLC 490      
504-305 1 Kenner LA   318J COMCAST IP PHONE, LLC 490      
504-305 2 Kenner LA   318J COMCAST IP PHONE, LLC 490   2002-09-19   
504-305 3 Kenner LA   318J COMCAST IP PHONE, LLC 490   2003-02-14   
504-305 4 Kenner LA   318J COMCAST IP PHONE, LLC 490   2003-10-05   
504-305 5 Kenner LA   318J COMCAST IP PHONE, LLC 490   2004-06-14   
504-305 6 Kenner LA   318J COMCAST IP PHONE, LLC 490   2005-04-24   
504-305 7 Kenner LA   150C VOICESTREAM GSM I, LLC 490   2007-12-08   
504-305 8 Kenner LA   477H AIRUS, INC. - LA 490   2020-12-06   
504-305 9 Kenner LA   150C VOICESTREAM GSM I, LLC 490   2007-12-08   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.