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: 558

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
937-558 A Dayton OH DYTNOHIBDS2  0265 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - OH 328      
937-558 0 Dayton OH DYTNOHIBDS2  0265 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - OH 328      
937-558 1 Dayton OH DYTNOHIBDS2  0265 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - OH 328      
937-558 2 Dayton OH DYTNOHIBDS2  0265 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - OH 328      
937-558 3 Dayton OH DYTNOHKT1MD  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328      
937-558 4 Dayton OH DYTNOHKT1MD  7460 LEVEL 3 TELECOM OF OHIO, LLC - OH 328      
937-558 5 Dayton OH DYTNOHIBDS2  0265 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - OH 328      
937-558 6 Dayton OH DYTNOH22X8Z  6025 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 328   2008-09-18   
937-558 7 Dayton OH DYTNOHIBDS2  0265 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - OH 328      
937-558 8 Dayton OH DYTNOH22X8Z  6025 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 328   2008-09-18   
937-558 9 Dayton OH DYTNOHIBDS2  0265 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - OH 328      

Last updated: Fri, 13 May 2022 22:16:13 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.