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]

Region: TX

OCN: 9748 AMERICAN MESSAGING SERVICES, LLC

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
713-317 A Houston TX HSTNTXMOIMD  560      
713-727 A Houston TX HSTNTXMOIMD  560      
713-908 A Houston TX HSTNTXMOIMD  560      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.