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: 297

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
314-297 A St Louis MO STLSMO05RMD  993E BANDWIDTH.COM CLEC, LLC - MO 520      
314-297 0 St Louis MO   993E BANDWIDTH.COM CLEC, LLC - MO 520   2013-07-22   
314-297 1 St Louis MO   9533 SOUTHWESTERN BELL 520   2013-07-27   
314-297 2 St Louis MO   9533 SOUTHWESTERN BELL 520   2013-07-27   
314-297 3 St Louis MO   9533 SOUTHWESTERN BELL 520   2013-07-27   
314-297 4 St Louis MO   9533 SOUTHWESTERN BELL 520   2013-07-27   
314-297 5 St Louis MO   9533 SOUTHWESTERN BELL 520   2013-07-27   
314-297 6 St Louis MO   6529 T-MOBILE USA, INC. 520   2013-09-19   
314-297 7 St Louis MO   6529 T-MOBILE USA, INC. 520   2013-09-19   
314-297 8 St Louis MO   6529 T-MOBILE USA, INC. 520   2013-09-19   
314-297 9 St Louis MO   6529 T-MOBILE USA, INC. 520   2013-09-19   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.