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: 454

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-454 A Dallas TX RCSNTXBZRS0  9533 SOUTHWESTERN BELL 552      
972-454 0 Dallas TX DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552      
972-454 1 Dallas TX DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552      
972-454 2 Dallas TX RCSNTXBZRS0  9533 SOUTHWESTERN BELL 552      
972-454 3 Dallas TX RCSNTXBZRS0  9533 SOUTHWESTERN BELL 552      
972-454 4 Dallas TX DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552      
972-454 5 Dallas TX DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552      
972-454 6 Dallas TX RCSNTXBZRS0  9533 SOUTHWESTERN BELL 552      
972-454 7 Dallas TX RCSNTXBZRS0  9533 SOUTHWESTERN BELL 552      
972-454 8 Dallas TX RCSNTXBZRS0  9533 SOUTHWESTERN BELL 552      
972-454 9 Dallas TX DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.