IBAN for home addresses. Yawn.

Nothing beats the What Three Words system and would be much more fun if not routeable at scale.

https://what3words.com/

7 digits can be written much faster than 3 words, and (most) digits are free of any unintended association. Also, the 7 digits may contain the house number. You cannot reliably use what3words for a delivery address, because the house on the square may have several house numbers. I also don't like the commercialism behind what3words.