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: 956 [Rate centres in NPA 956] [Dial plan for NPA 956]

NXX: 320

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-320 A Harlingen TX HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568      
956-320 0 Harlingen TX HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2008-12-19   
956-320 1 Harlingen TX HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2010-03-07   
956-320 2 Harlingen TX HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2010-06-24   
956-320 3 Harlingen TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2010-07-08   
956-320 4 Harlingen TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2010-07-08   
956-320 5 Harlingen TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2010-07-08   
956-320 6 Harlingen TX HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2010-09-25   
956-320 7 Harlingen TX HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2010-10-24   
956-320 8 Harlingen TX HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2010-10-29   
956-320 9 Harlingen TX HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2010-10-29   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.