get the full address from a zip (postal) code

[micseydel]

Since this doesn't seem near solved in either place...

I need to get the full address from a zipcode

I don't know what this means. It sounds like you want to do something that doesn't make any sense - a zipcode (usually) doesn't resolve into a single address. Your SO post mentions a zip code applying to multiple countries, which is also something I don't understand. Like they said on SO, you need to clarify your question.