The history of the telephone exchange names in Chicago, as in most significant United States cities, can be divided into three periods:
At this time, no information has been researched on the pre-dial period in
Chicago. This material will be added as I find it out.
|Main Chicago page|
|Chronological periods of the Chicago data:|
|Pre-dial period||Early dial period||Late dial period|
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Last modified November 7, 2011.