ZIP codes, postcodes, postal routing codes, and their formats.
View All TagsWe injected a postcode's country signal straight into the model, and German addresses jumped thirty-five points. Then three retrains taught us the same anchor can't help an address written in the other order, because it never learned to find the city. It learned which way to look.
We taught a resolver to drop a postcode into the city polygon that contains it. Japan has no city polygons, so we resolved it another way and hit 94%. Then Korea let us nail the coordinate every time and refused to give up the name — and the gazetteer is the reason.
We thought a postcode was a strong enough signal to delete a configuration flag. Then we measured it. A five-digit code pins its own country less than half the time — and that number talked us out of writing the code we were about to write.