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: NWCSIN01DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
765-515 A New Castle IN 9325 INDIANA BELL TEL CO INC 336      
765-519 A New Castle IN 9325 INDIANA BELL TEL CO INC 336      
765-521 A New Castle IN 9325 INDIANA BELL TEL CO INC 336      
765-527 A New Castle IN 9325 INDIANA BELL TEL CO INC 336      
765-529 A New Castle IN 9325 INDIANA BELL TEL CO INC 336      
765-593 A New Castle IN 9325 INDIANA BELL TEL CO INC 336      
765-599 A New Castle IN 9325 INDIANA BELL TEL CO INC 336      
765-836 A Mount Summit IN 9325 INDIANA BELL TEL CO INC 336      

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

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