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: 314 [Rate centres in NPA 314] [Dial plan for NPA 314]

NXX: 227

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
314-227 A Ladue MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520      
314-227 0 Ladue MO   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2008-03-25   
314-227 1 Ladue MO   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2009-04-27   
314-227 2 Ladue MO   829J PAETEC ITEL, LLC 520   2008-07-28   
314-227 3 Ladue MO   829J PAETEC ITEL, LLC 520   2008-09-20   
314-227 4 Ladue MO   829J PAETEC ITEL, LLC 520   2009-09-10   
314-227 5 Ladue MO   792K CHARTER IP ENABLED SERVICES, LLC 520   2003-08-15   
314-227 6 Ladue MO   829J PAETEC ITEL, LLC 520   2009-02-05   
314-227 7 Ladue MO   829J PAETEC ITEL, LLC 520   2009-02-05   
314-227 8 Ladue MO   829J PAETEC ITEL, LLC 520   2009-02-05   
314-227 9 Ladue MO   993E BANDWIDTH.COM CLEC, LLC - MO 520   2010-05-14   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.