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

NXX: 428

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-428 A Carrollton TX DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-428 0 Carrollton TX DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-428 1 Carrollton TX DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-428 2 Carrollton TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2005-11-30   
972-428 3 Carrollton TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2005-11-30   
972-428 4 Carrollton TX DLLSTXREDS0  7726 SOUTHWESTERN BELL TELEPHONE COMPANY - TX 552   2009-10-19   
972-428 5 Carrollton TX DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-428 6 Carrollton TX DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-428 7 Carrollton TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2008-08-29   
972-428 8 Carrollton TX DLLSTXSQDS4  327E YMAX COMMUNICATIONS CORP. - TX 552   2009-07-23   
972-428 9 Carrollton TX DLLSTXSQDS4  327E YMAX COMMUNICATIONS CORP. - TX 552   2009-07-23   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.