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: 748

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-748 A Rio Hondo TX RHNDTXRHRS0  9533 SOUTHWESTERN BELL 568      
956-748 0 Rio Hondo TX   073H TELNYX LLC 568   2021-04-08   
956-748 1 Rio Hondo TX   9533 SOUTHWESTERN BELL 568      
956-748 2 Rio Hondo TX   9533 SOUTHWESTERN BELL 568      
956-748 3 Rio Hondo TX   9533 SOUTHWESTERN BELL 568      
956-748 4 Rio Hondo TX   9533 SOUTHWESTERN BELL 568      
956-748 5 Rio Hondo TX   793K TWC IP ENABLED SERVICES, LLC 568   2007-05-03   
956-748 6 Rio Hondo TX   319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568   2005-10-20   
956-748 7 Rio Hondo TX   4866 SMARTCOM TELEPHONE, LLC 568   2009-10-23   
956-748 8 Rio Hondo TX   903C ONVOY, LLC - TX 568   2024-03-03   
956-748 9 Rio Hondo TX   9533 SOUTHWESTERN BELL 568      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.