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.

Switch: DLLFTXFQDS1

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
972-894 2 Irving TX 7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-894 3 Irving TX 7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2010-03-07   
972-894 4 Irving TX 7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-894 5 Irving TX 7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-894 6 Irving TX 7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-894 7 Irving TX 7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-894 8 Irving TX 7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-894 9 Irving TX 7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-905 2 Plano TX 7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2011-05-17   
972-966 7 Lewisville TX 7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2010-03-19   

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Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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