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: 723

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
314-723 A St Louis MO STLVMOOH6MD  6529 T-MOBILE USA, INC. 520      
314-723 0 St Louis MO   6529 T-MOBILE USA, INC. 520   2006-03-26   
314-723 1 St Louis MO   6529 T-MOBILE USA, INC. 520   2006-03-26   
314-723 2 St Louis MO   6529 T-MOBILE USA, INC. 520   2006-03-26   
314-723 3 St Louis MO   6529 T-MOBILE USA, INC. 520   2006-03-26   
314-723 4 St Louis MO   6529 T-MOBILE USA, INC. 520   2006-03-26   
314-723 5 St Louis MO   093F ONVOY, LLC - MO 520   2009-02-26   
314-723 6 St Louis MO   093F ONVOY, LLC - MO 520   2009-02-26   
314-723 7 St Louis MO   145J TERRA NOVA TELECOM INC. 520   2026-02-23   
314-723 9 St Louis MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2024-11-22   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.