City of Big Questions: What’s With Chicago Mail Postmarks? | Chicago Magazine

Q: Why is Chicago mail postmarked “Carol Stream” and “South Suburban”? I have a box full of old letters, mostly from the 1990s — the last decade when people wrote letters. One envelope from 1993 is postmarked “Chicago, IL 606.” You won’t see that anymore, though, thanks to the centralization of mail processing. In the old days, ... Read more