Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 956 [Rate centres in NPA 956] [Dial plan for NPA 956]

NXX: 637

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-637 A Rio Hondo TX HRLNTXATZMD  7421 AT&T - LOCAL 568      
956-637 0 Rio Hondo TX   515J IP HORIZON LLC 568   2022-03-31   
956-637 1 Rio Hondo TX   515J IP HORIZON LLC 568   2023-12-28   
956-637 2 Rio Hondo TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2021-08-28   
956-637 3 Rio Hondo TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2021-08-28   
956-637 4 Rio Hondo TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-12-04   
956-637 5 Rio Hondo TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-12-04   
956-637 6 Rio Hondo TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-06-24   
956-637 7 Rio Hondo TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2021-09-30   
956-637 8 Rio Hondo TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2021-09-30   
956-637 9 Rio Hondo TX HRLNTXATZMD  7421 AT&T - LOCAL 568   2021-06-17   

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

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