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: 428

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
504-428 A Kenner LA NWORLAAVDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 490      
504-428 0 Kenner LA NWORLAAVDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 490      
504-428 1 Kenner LA NWORLAMTX6Y  150C VOICESTREAM GSM I, LLC 490   2005-12-04   
504-428 2 Kenner LA NWORLAMTX6Y  150C VOICESTREAM GSM I, LLC 490   2005-12-04   
504-428 3 Kenner LA NWORLASD5MD  145J TERRA NOVA TELECOM INC. 490   2024-12-29   
504-428 4 Kenner LA NWORLAMTX6Y  150C VOICESTREAM GSM I, LLC 490   2006-01-17   
504-428 5 Kenner LA NWORLAMTX6Y  150C VOICESTREAM GSM I, LLC 490   2006-01-17   
504-428 6 Kenner LA NWORLAMTX6Y  150C VOICESTREAM GSM I, LLC 490   2006-01-17   
504-428 7 Kenner LA NWORLAAVDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 490      
504-428 8 Kenner LA NWORLAMTX6Y  150C VOICESTREAM GSM I, LLC 490   2006-01-17   
504-428 9 Kenner LA NWORLAMTX6Y  150C VOICESTREAM GSM I, LLC 490   2006-01-17   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.