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: 900

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
740-900 A Somerset OH CLMBOHLT1MD  464C ONVOY, LLC - OH 324      
740-900 0 Somerset OH   464C ONVOY, LLC - OH 324   2016-04-11   
740-900 1 Somerset OH   464C ONVOY, LLC - OH 324   2016-04-11   
740-900 2 Somerset OH   464C ONVOY, LLC - OH 324   2019-05-22   
740-900 3 Somerset OH   516J TON80 COMMUNICATIONS, LLC 324   2021-11-18   
740-900 7 Somerset OH   464C ONVOY, LLC - OH 324   2015-08-08   
740-900 8 Somerset OH   515J IP HORIZON LLC 324   2016-10-12   
740-900 9 Somerset OH   073H TELNYX LLC 324   2017-07-28   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.