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: AUSTTXPFDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
512-233 3 Austin TX 9533 SOUTHWESTERN BELL 558   2001-07-05   
512-251 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-252 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-533 8 Austin TX 9533 SOUTHWESTERN BELL 558   2001-03-21   
512-594 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-670 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-670 0 Austin TX 9533 SOUTHWESTERN BELL 558   2000-10-16   
512-670 1 Austin TX 9533 SOUTHWESTERN BELL 558   2001-12-21   
512-670 2 Austin TX 9533 SOUTHWESTERN BELL 558   2000-10-16   
512-670 3 Austin TX 9533 SOUTHWESTERN BELL 558   2001-12-21   
512-670 4 Austin TX 9533 SOUTHWESTERN BELL 558      
512-670 5 Austin TX 9533 SOUTHWESTERN BELL 558   2000-11-27   
512-670 7 Austin TX 9533 SOUTHWESTERN BELL 558   2000-10-16   
512-670 9 Austin TX 9533 SOUTHWESTERN BELL 558      
512-703 9 Austin TX 9533 SOUTHWESTERN BELL 558      
512-989 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-990 A Austin TX 9533 SOUTHWESTERN BELL 558      

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.