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: 740

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
740-740 A Chesapeake OH   464C ONVOY, LLC - OH 324   2025-10-17   
740-740 0 Chesapeake OH   464C ONVOY, LLC - OH 324   2025-10-17   
740-740 4 Chesapeake OH   464C ONVOY, LLC - OH 324   2025-10-17   
740-740 7 Chesapeake OH   464C ONVOY, LLC - OH 324   2025-10-17   
740-740 8 Chesapeake OH   464C ONVOY, LLC - OH 324   2025-10-17   
740-740 9 Chesapeake OH   464C ONVOY, LLC - OH 324   2025-10-17   

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.