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: 740 [Rate centres in NPA 740] [Dial plan for NPA 740]

NXX: 530

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
740-530 A Duffy OH   464C ONVOY, LLC - OH 324      
740-530 0 Duffy OH   284F PEERLESS NETWORK OF OHIO, LLC - OH 324   2013-04-27   
740-530 1 Duffy OH   284F PEERLESS NETWORK OF OHIO, LLC - OH 324   2013-04-27   
740-530 2 Duffy OH   515J IP HORIZON LLC 324   2024-04-28   
740-530 3 Duffy OH   464C ONVOY, LLC - OH 324   2021-03-11   
740-530 4 Duffy OH   4863 LEVEL 3 COMMUNICATIONS, LLC - OH 324   2004-05-27   
740-530 5 Duffy OH   5562 METROPCS, INC. 324   2021-02-12   
740-530 6 Duffy OH   515J IP HORIZON LLC 324   2024-04-28   
740-530 7 Duffy OH   464C ONVOY, LLC - OH 324   2016-04-06   
740-530 8 Duffy OH   464C ONVOY, LLC - OH 324   2016-04-06   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.