why do we need to use city and state in our addresses if ZIP codes are already linked to the city and state?

Question

why do we need to use city and state in our addresses if ZIP codes are already linked to the city and state?

In: 100

Answer 1

In Ireland the zip codes are per household so technically you don’t even need to have anything else on the address. But the rest is there for a backup if it’s damaged or illegible