https://blog.wongcw.com/2020/04/01/icann-%e6%89%b9%e5%87%86%e4%ba%86verisign-%e7%9a%84%e5%90%88%e5%90%8c-com%e5%9f%9f%e5%90%8d%e5%b0%87%e6%bc%b2%e5%83%b9/