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.

NPA: 937 [Rate centres in NPA 937] [Dial plan for NPA 937]

NXX: 531

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
937-531 A Dayton OH DYTNOHKTDS1  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328      
937-531 0 Dayton OH DYTNOHKTDS1  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328      
937-531 1 Dayton OH DYTNOHKTDS1  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328   2005-12-18   
937-531 2 Dayton OH DYTNOHKTDS1  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328      
937-531 3 Dayton OH DYTNOHKTDS1  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328      
937-531 4 Dayton OH DYTNOHKTDS1  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328      
937-531 5 Dayton OH DYTNOHKTDS1  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328      
937-531 6 Dayton OH DYTNOHKTDS1  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328      
937-531 7 Dayton OH DYTNOHKTDS1  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328   2005-12-18   
937-531 8 Dayton OH DYTNOHKTDS1  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328   2003-03-30   
937-531 9 Dayton OH DYTNOHKTDS1  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328   2003-03-30   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.