Local Calling Guide

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NPA: 972 [Rate centres in NPA 972] [Dial plan for NPA 972]

NXX: 236

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-236 A Carrollton TX DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-236 0 Carrollton TX DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-236 1 Carrollton TX DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-236 2 Carrollton TX DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-236 3 Carrollton TX   515J IP HORIZON LLC 552   2016-01-04   
972-236 4 Carrollton TX IRNGTXXBXTY  903C ONVOY, LLC - TX 552   2016-01-07   
972-236 5 Carrollton TX IRNGTXXBXTY  903C ONVOY, LLC - TX 552   2016-01-07   
972-236 6 Carrollton TX DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-236 7 Carrollton TX IRNGTXXBXTY  903C ONVOY, LLC - TX 552   2011-04-04   
972-236 8 Carrollton TX DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2015-12-30   
972-236 9 Carrollton TX DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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