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: 818

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-818 A Dallas TX DLLSTXREDS0  9533 SOUTHWESTERN BELL 552      
972-818 0 Dallas TX DLLSTXREDS0  9533 SOUTHWESTERN BELL 552      
972-818 1 Dallas TX DLLSTXALDS4  624H ONVOY SPECTRUM, LLC 552   2024-01-18   
972-818 2 Dallas TX DLLSTXTAXTZ  624H ONVOY SPECTRUM, LLC 552   2021-11-08   
972-818 3 Dallas TX DLLSTXREDS0  9533 SOUTHWESTERN BELL 552      
972-818 4 Dallas TX DLLSTXTAXTZ  624H ONVOY SPECTRUM, LLC 552   2021-11-08   
972-818 5 Dallas TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2016-02-15   
972-818 6 Dallas TX DLLSTXTAXTZ  624H ONVOY SPECTRUM, LLC 552   2021-12-19   
972-818 7 Dallas TX DLLSTXREDS0  9533 SOUTHWESTERN BELL 552      
972-818 8 Dallas TX DLLSTXREDS0  9533 SOUTHWESTERN BELL 552      
972-818 9 Dallas TX DLLSTXREDS0  9533 SOUTHWESTERN BELL 552      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.