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: 713 [Rate centres in NPA 713] [Dial plan for NPA 713]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
713-300 A Houston TX HSTOTX46DS0  7239 MCI WORLDCOM COMMUNICATIONS, INC. - TX 560      

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.