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: PLFDIN01DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
317-406 A Plainfield IN 9325 INDIANA BELL TEL CO INC 336      
317-406 2 Plainfield IN 9325 INDIANA BELL TEL CO INC 336   2005-12-22   
317-837 A Plainfield IN 9325 INDIANA BELL TEL CO INC 336      
317-838 A Plainfield IN 9325 INDIANA BELL TEL CO INC 336      
317-839 A Plainfield IN 9325 INDIANA BELL TEL CO INC 336      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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