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: CHCGILCLXOX

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
872-818 7 Chicago Zone 07-Stewart IL 516C AT&T CORP. 358   2015-06-03   
872-946 7 Chicago Zone 03-Kildare IL 516C AT&T CORP. 358   2022-04-01   

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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