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: 510

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
504-510 A New Orleans LA NWORLAMA90Z  516C AT&T CORP. 490      
504-510 0 New Orleans LA   5562 METROPCS, INC. 490   2014-12-28   
504-510 1 New Orleans LA   5562 METROPCS, INC. 490   2014-12-28   
504-510 2 New Orleans LA   318J COMCAST IP PHONE, LLC 490   2015-02-14   
504-510 3 New Orleans LA   516C AT&T CORP. 490   2015-04-04   
504-510 4 New Orleans LA   516C AT&T CORP. 490   2014-12-24   
504-510 5 New Orleans LA   516C AT&T CORP. 490   2014-11-29   
504-510 6 New Orleans LA   5562 METROPCS, INC. 490   2014-12-28   
504-510 7 New Orleans LA   5562 METROPCS, INC. 490   2014-12-28   
504-510 8 New Orleans LA   749E ONVOY, LLC - LA 490   2015-05-07   
504-510 9 New Orleans LA   150C VOICESTREAM GSM I, LLC 490   2015-08-16   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.