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: 279

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
314-279 A Ladue MO   792K CHARTER IP ENABLED SERVICES, LLC 520      
314-279 0 Ladue MO   073H TELNYX LLC 520   2017-03-30   
314-279 1 Ladue MO   792K CHARTER IP ENABLED SERVICES, LLC 520   2015-12-10   
314-279 2 Ladue MO   7432 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 520   2015-01-30   
314-279 3 Ladue MO   993E BANDWIDTH.COM CLEC, LLC - MO 520   2015-03-21   
314-279 4 Ladue MO   993E BANDWIDTH.COM CLEC, LLC - MO 520   2015-03-21   
314-279 5 Ladue MO   993E BANDWIDTH.COM CLEC, LLC - MO 520   2015-03-21   
314-279 6 Ladue MO   516C AT&T CORP. 520   2015-02-10   
314-279 7 Ladue MO   993E BANDWIDTH.COM CLEC, LLC - MO 520   2015-03-21   
314-279 8 Ladue MO   993E BANDWIDTH.COM CLEC, LLC - MO 520   2015-03-21   
314-279 9 Ladue MO   993E BANDWIDTH.COM CLEC, LLC - MO 520   2015-03-21   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.