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: 432

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-432 A Dallas TX DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-432 0 Dallas TX DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-432 1 Dallas TX DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-432 2 Dallas TX DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-432 3 Dallas TX DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-432 4 Dallas TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
972-432 5 Dallas TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
972-432 6 Dallas TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
972-432 7 Dallas TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
972-432 8 Dallas TX DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-432 9 Dallas TX DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.