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.
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Switch: STLSMO05XKX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
314-294 A Ladue MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-360 A Ladue MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-407 A Ladue MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-419 A Ladue MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-424 A Ladue MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-483 A St Louis MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-490 A Ladue MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-491 A Ladue MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-508 A St Louis MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-509 A St Louis MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-510 A St Louis MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-559 A St Louis MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-663 A St Louis MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-670 A St Louis MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-672 A St Louis MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-734 A Ladue MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-790 A Ladue MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-836 A St Louis MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-841 A St Louis MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
314-871 A St Louis MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
573-272 A Sikeston MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
573-278 A Cape Girardeau MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      
636-574 A St Charles MO 9748 AMERICAN MESSAGING SERVICES, LLC 520      

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

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