I’m not sure how long this has been around, but the USPS has a tool where you can see the mail route in any geographic area. Just search for an address and you can see where they go. It’s meant for businesses interested in direct mail, so it also shows average income, number of houses, and how much it’d cost to send mail on that route.
I had no idea it was that easy to focus on a geographic area, but it makes sense now that I think about the type of ads I get in the mailbox.
