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: DYTNOH22X3Y

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
513-355 A Middletown OH 9748 AMERICAN MESSAGING SERVICES, LLC 328      
937-261 A Dayton OH 9748 AMERICAN MESSAGING SERVICES, LLC 328      
937-357 A Beavercreek OH 9748 AMERICAN MESSAGING SERVICES, LLC 328      
937-406 A Dayton OH 9748 AMERICAN MESSAGING SERVICES, LLC 328      
937-413 A Dayton OH 9748 AMERICAN MESSAGING SERVICES, LLC 328      
937-647 A Dayton OH 9748 AMERICAN MESSAGING SERVICES, LLC 328      
937-850 A Dayton OH 9748 AMERICAN MESSAGING SERVICES, LLC 328      
937-852 A Springfield OH 9748 AMERICAN MESSAGING SERVICES, LLC 328      
937-921 A Piqua OH 9748 AMERICAN MESSAGING SERVICES, LLC 328      
937-922 A Springfield OH 9748 AMERICAN MESSAGING SERVICES, LLC 328      
937-923 A New Carlisle OH 9748 AMERICAN MESSAGING SERVICES, LLC 328      

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

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