The example does not allow for zipcodes from other countries, but pretends to allow multiple countries.

Once again an American thinking his country’s the navel of the world.

The example provided is USA centric but eminently repeatable in other countries and makes a ton of sense. Some parts of the world you can get to the right side of the street between 10 and 20 XYZ street with the code.

I entered 83250 as my zip code.

Now am I in MacCammon, Idaho, United States ; or in la Londe-Les-Maures, Var, France ?

You cannot know from this information alone. So no, you cannot guess the country from the zip code.

We have 6 characters and I have seen 7. And Australia has 4. This post is like “World Series” that only exists in USA