If it was stated in their terms or rules and regulations that they have the right to disclose their location then you cannot force them to answer your question especially if you have accepted it upon joining their exchange.
But if you are going to use the search engine then you can find that their headquarters is in Malta after shifting out of China and Japan subsequently. But it's up to you if you are going to believe this details or not and I hope that you will get satisfied by all the answers that were being replied to your post.