Roland Perry wrote:

When I was in Cambridge, I used a very short address that worked every
time. (Sidney Sussex, Cambridge). I've never had the opportunity to
have such a short address again.

That could cause problems with an item posted in Massachusetts.
Especially as there appears to be a Sidney Sussex College in New York,
New York.

I might reasonably expect an international correspondent to add "UK".

Even so mail can go to wildly different places. The University of Kent at
Canterbury (UK) and the University of Canterbury (New Zealand) have received
some of each other's mail over the years.

Getting back towards transport, Belmont station was originally named
"California" after a nearby pub but supposedly renamed because mail kept
going to the US.