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: 761

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
740-761 A Bethesda OH   464C ONVOY, LLC - OH 324      
740-761 0 Bethesda OH   318J COMCAST IP PHONE, LLC 324   2005-05-16   
740-761 1 Bethesda OH   464C ONVOY, LLC - OH 324   2019-02-22   
740-761 2 Bethesda OH   464C ONVOY, LLC - OH 324   2019-02-22   
740-761 3 Bethesda OH   464C ONVOY, LLC - OH 324   2021-03-11   
740-761 4 Bethesda OH   464C ONVOY, LLC - OH 324   2016-04-11   
740-761 5 Bethesda OH   464C ONVOY, LLC - OH 324   2014-11-07   
740-761 6 Bethesda OH   464C ONVOY, LLC - OH 324   2021-03-11   
740-761 7 Bethesda OH   464C ONVOY, LLC - OH 324   2016-04-11   
740-761 8 Bethesda OH   036B CITYNET OHIO, LLC - OH 324   2006-04-08   
740-761 9 Bethesda OH   516C AT&T CORP. 324   2024-08-11   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.