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: 640

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
740-640 A Bremen OH CLMBOH1125Z  508J CENTURYLINK COMMUNICATIONS, LLC 324      
740-640 0 Bremen OH   145J TERRA NOVA TELECOM INC. 324   2025-07-17   
740-640 3 Bremen OH   624H ONVOY SPECTRUM, LLC 324   2023-05-08   
740-640 4 Bremen OH   464C ONVOY, LLC - OH 324   2021-03-11   
740-640 5 Bremen OH   464C ONVOY, LLC - OH 324   2021-03-11   
740-640 6 Bremen OH   464C ONVOY, LLC - OH 324   2019-06-07   
740-640 7 Bremen OH   508J CENTURYLINK COMMUNICATIONS, LLC 324   2017-04-03   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.