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.
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Switch: AUSTTXJODS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
512-219 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-249 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-250 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-257 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-258 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-331 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-335 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-336 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-378 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-401 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-506 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-782 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-918 A Austin TX 9533 SOUTHWESTERN BELL 558      
512-996 A Austin TX 9533 SOUTHWESTERN BELL 558      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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