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.

Switch: STLSMO01X0Y

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
314-573 8 St Louis MO 732J NUSO, LLC 520   2024-08-19   
314-891 3 Ladue MO 732J NUSO, LLC 520   2024-10-24   
314-928 A St Louis MO 732J NUSO, LLC 520      
314-928 1 St Louis MO 732J NUSO, LLC 520   2022-10-28   
557-218 2 Ladue MO 732J NUSO, LLC 520   2024-10-24   
557-222 3 St Louis MO 732J NUSO, LLC 520   2024-04-12   
557-222 4 St Louis MO 732J NUSO, LLC 520   2024-04-12   
557-222 5 St Louis MO 732J NUSO, LLC 520   2024-08-19   
557-222 6 St Louis MO 732J NUSO, LLC 520   2024-08-19   
557-226 1 Creve Coeur MO 732J NUSO, LLC 520   2024-10-26   
557-226 2 Creve Coeur MO 732J NUSO, LLC 520   2024-10-26   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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