What is the zip code for Oranjestad Aruba?

Aruba doesn't use zip codes. The locality [city, town] and the country name are sufficient for addresses in Aruba. The street address is given first and the house number follows.

For example, the address of the primary post office is as follows:

Post Aruba N.V.,

J.E. Irausquinplein #9

Oranjestad, Aruba