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: 425

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
314-425 A St Louis MO STLSMO01DSA  9533 SOUTHWESTERN BELL 520      
314-425 0 St Louis MO STLSMO01DSA  9533 SOUTHWESTERN BELL 520      
314-425 1 St Louis MO STLSMO01DSA  9533 SOUTHWESTERN BELL 520      
314-425 2 St Louis MO STLSMO01DSA  9533 SOUTHWESTERN BELL 520      
314-425 3 St Louis MO STLSMO07DSA  9533 SOUTHWESTERN BELL 520      
314-425 4 St Louis MO STLSMO01DSA  9533 SOUTHWESTERN BELL 520      
314-425 5 St Louis MO STLSMO01DSA  9533 SOUTHWESTERN BELL 520      
314-425 6 St Louis MO STLSMO01DSA  9533 SOUTHWESTERN BELL 520      
314-425 7 St Louis MO STLSMO01DSA  9533 SOUTHWESTERN BELL 520      
314-425 8 St Louis MO STLSMO01DSA  9533 SOUTHWESTERN BELL 520      
314-425 9 St Louis MO STLVMOOH6MD  6529 T-MOBILE USA, INC. 520   2007-04-05   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.