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: 634

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-634 A Mercedes TX   903C ONVOY, LLC - TX 568      
956-634 0 Mercedes TX   903C ONVOY, LLC - TX 568   2025-05-10   
956-634 1 Mercedes TX   515J IP HORIZON LLC 568   2022-03-31   
956-634 2 Mercedes TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2021-12-24   
956-634 3 Mercedes TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-12-04   
956-634 4 Mercedes TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-12-04   
956-634 5 Mercedes TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2021-12-24   
956-634 6 Mercedes TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-06-24   
956-634 7 Mercedes TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2023-08-12   
956-634 8 Mercedes TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2023-08-12   
956-634 9 Mercedes TX HRLNTXDU5MD  490J DISH WIRELESS, LLC 568   2022-07-01   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.