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: DYTNOH15OMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
513-804 A Middletown OH 7421 AT&T - LOCAL 328      
513-804 9 Middletown OH 7421 AT&T - LOCAL 328      
937-242 A Dayton OH 7421 AT&T - LOCAL 328      
937-242 4 Dayton OH 7421 AT&T - LOCAL 328      
937-242 9 Dayton OH 7421 AT&T - LOCAL 328      
937-306 3 Beavercreek OH 7421 AT&T - LOCAL 328   2003-10-20   
937-476 4 Dayton OH 7421 AT&T - LOCAL 328   2009-04-20   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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