[ptaipale]

Given postal code, asking for city and state is pretty much useless.

This view is US-centric. Others have pointed out that there are cases even in the US where this may cause confusion.

But for me, the bigger problem is that asking for state is counter-productive. The state and country are the same thing for me. Some sites force users to put something in the state field, whatever country. Other sites explicitly check the country and reject input if there is a state specified for a country that doesn't have them. You never know. Most of the time it fortunately makes no difference. But it's a slight annoyance.