Local Calling Guide

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Switch: CHCGILCA

Switch (link to prefixes) Switch name Company
CHCGILCADS0 CHICAGO CALUMET  9329 ILLINOIS BELL TEL CO 
CHCGILCADS1 CHICAGO CALUMET  9329 ILLINOIS BELL TEL CO 

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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