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: 924

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-924 A Anna TX ANNATXWARS1  9533 SOUTHWESTERN BELL 552      
972-924 0 Anna TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2008-09-20   
972-924 1 Anna TX ANNATXWARS1  9533 SOUTHWESTERN BELL 552      
972-924 2 Anna TX ANNATXWARS1  9533 SOUTHWESTERN BELL 552      
972-924 3 Anna TX ANNATXWARS1  9533 SOUTHWESTERN BELL 552      
972-924 4 Anna TX ANNATXWARS1  9533 SOUTHWESTERN BELL 552      
972-924 5 Anna TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2006-04-09   
972-924 6 Anna TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2012-12-14   
972-924 7 Anna TX DLLSTXRIXYY  318C CEBRIDGE TELECOM TX , L.P. - TX 552   2007-05-11   
972-924 8 Anna TX ANNATXWARS1  9533 SOUTHWESTERN BELL 552      
972-924 9 Anna TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2009-04-27   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.