What is the postal code of Abu-Halifa, Kuwait?

Hey everyone, so I want to order something online and they need the postal code. And I have no clue what it is. When I was in California, I knew it 'cause a postal code is really common and all but here in Kuwait, it's not. So can someone PLEASE tell me the postal code of Abu-Halifa in Kuwait? And I know this has nothing to do with this question but can someone please tell me what pre-order means exactly? Thanks a lot!