> It still definitely counts as an edge case though, in the sense that if the building were torn down or foreclosed I don't think its block would still warrant

> It still definitely counts as an edge case though, in the sense that if the building were torn down or foreclosed I don't think its block would still warrant its own code For example, the World Trade Center's zip code was retired after the 9/11 attacks. https://en.wikipedia.org/wiki/10048_(ZIP_code) https://en.wikipedia.org/wiki/10048_(ZIP_code)