Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 314 [Rate centres in NPA 314] [Dial plan for NPA 314]

NXX: 438

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
314-438 A Ladue MO STLSMO45DSA  9533 SOUTHWESTERN BELL 520      
314-438 0 Ladue MO   9533 SOUTHWESTERN BELL 520      
314-438 1 Ladue MO   9533 SOUTHWESTERN BELL 520      
314-438 2 Ladue MO   7432 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 520   2010-09-13   
314-438 3 Ladue MO   7432 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 520   2010-09-13   
314-438 4 Ladue MO   9533 SOUTHWESTERN BELL 520      
314-438 5 Ladue MO   093F ONVOY, LLC - MO 520   2008-10-18   
314-438 6 Ladue MO   093F ONVOY, LLC - MO 520   2008-10-18   
314-438 7 Ladue MO   6529 T-MOBILE USA, INC. 520   2011-05-03   
314-438 8 Ladue MO   5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 520   2023-08-26   
314-438 9 Ladue MO   9533 SOUTHWESTERN BELL 520      

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

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