The sponsored top-level domains .aero, .coop, .museum, and .pro. require the registrant to be member of or affiliated with specific communities, and are therefore not accessible to the general public. The .aero TLD, for example, requires the registrant to prove membership of the aviation community. Similarly, .gov and .mil are reserved for the U.S. Government, and U.S. Military, respectively, while .edu is restricted to educational entities.
Country-code TLDs outside the United States are also excluded.
