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: 556

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-556 A Los Fresnos TX HRLNTXHGXOX  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 568      
956-556 0 Los Fresnos TX HRLNTXHGXOX  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 568      
956-556 1 Los Fresnos TX HRLNTXHGXOX  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 568      
956-556 2 Los Fresnos TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568      
956-556 3 Los Fresnos TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568      
956-556 4 Los Fresnos TX HRLNTXHG8MD  073H TELNYX LLC 568      
956-556 5 Los Fresnos TX HRLNTXHGXOX  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 568      
956-556 6 Los Fresnos TX HRLNTXHGXOX  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 568      
956-556 7 Los Fresnos TX   515J IP HORIZON LLC 568      
956-556 8 Los Fresnos TX HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568      
956-556 9 Los Fresnos TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.