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: AUSTTXGRDS4

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
512-634 A Austin TX 7421 AT&T - LOCAL 558      
512-634 0 Austin TX 7421 AT&T - LOCAL 558      
512-634 1 Austin TX 7421 AT&T - LOCAL 558      
512-634 2 Austin TX 7421 AT&T - LOCAL 558      
512-634 3 Austin TX 7421 AT&T - LOCAL 558      
512-634 4 Austin TX 7421 AT&T - LOCAL 558      
512-634 5 Austin TX 7421 AT&T - LOCAL 558      
512-634 9 Austin TX 7421 AT&T - LOCAL 558      
512-655 4 Austin TX 7421 AT&T - LOCAL 558   2012-07-16   
512-655 5 Austin TX 7421 AT&T - LOCAL 558   2012-07-16   
512-666 2 Austin TX 7421 AT&T - LOCAL 558   2011-06-10   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.