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: ECHCINECDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
219-378 A East Chicago IN 9325 INDIANA BELL TEL CO INC 358      
219-391 A East Chicago IN 9325 INDIANA BELL TEL CO INC 358      
219-392 A East Chicago IN 9325 INDIANA BELL TEL CO INC 358      
219-397 A East Chicago IN 9325 INDIANA BELL TEL CO INC 358      
219-398 A East Chicago IN 9325 INDIANA BELL TEL CO INC 358      
219-399 A East Chicago IN 9325 INDIANA BELL TEL CO INC 358      
219-703 A East Chicago IN 9325 INDIANA BELL TEL CO INC 358      

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

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