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: 337 [Rate centres in NPA 337] [Dial plan for NPA 337]

NXX: 456

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
337-456 A Lafayette LA LFYTLAMAXEZ  318J COMCAST IP PHONE, LLC 488      
337-456 1 Lafayette LA   318J COMCAST IP PHONE, LLC 488   2010-07-07   
337-456 2 Lafayette LA   318J COMCAST IP PHONE, LLC 488   2007-11-26   
337-456 3 Lafayette LA   318J COMCAST IP PHONE, LLC 488   2008-04-02   
337-456 4 Lafayette LA   318J COMCAST IP PHONE, LLC 488   2007-02-28   
337-456 5 Lafayette LA   318J COMCAST IP PHONE, LLC 488   2008-05-09   
337-456 6 Lafayette LA   318J COMCAST IP PHONE, LLC 488   2008-07-20   
337-456 7 Lafayette LA   318J COMCAST IP PHONE, LLC 488   2009-01-22   
337-456 8 Lafayette LA   318J COMCAST IP PHONE, LLC 488   2009-06-30   
337-456 9 Lafayette LA   318J COMCAST IP PHONE, LLC 488   2012-07-26   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.