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.

OCN: 063E PEERLESS NETWORK OF ILLINOIS, LLC - IL

<< 1 2 3 4 5 6 7 8 9 10 11 12

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
872-873 6 Chicago Zone 11-O'Hare IL CHCGILWUDS4  358   2020-10-26   
872-895 9 Chicago Zone 01-Calumet IL CHCGILWUDS4  358   2021-01-07   

<< 1 2 3 4 5 6 7 8 9 10 11 12

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.