That’s very strange, my original posting has disappeared.
I had asked if the US ZIP code was detailed enough to be entered into a sat-nav to take you to a specific address.
In the UK this is possible because our system only includes a small number of addresses for each post-code.
That would require ZIP + 4, and I’ve never seen a SatNav that uses all 9 digits. I suspect that it will happen eventually.
Not the 9-digit version. For example, my mother shares the same ZIP+4 with the four other detached, single-family houses on her side of the street.
On UK SatNavs you can enter the house number plus the post-code to take you to a specific address.