Should the Internet Corporation for Assigned Names and Numbers (ICANN) regulate, and if so, what should it regulate and how? These issues depend on normative criteria, which can give rise to arguments for or against ICANN’s regulatory authority. These criteria could be legal, economic, political, technical and so on. If we treat this as a legal question, the ICANN Bylaws should provide at least part of the answer. Accordingly, ICANN’s regulatory authority is examined here based on its Bylaws, which contain an explicit prohibition to regulate outside its mission. However, the problem is that the mission’s boundaries are unclear.