Domains can be registered exclusively below of second- level domains. For example, there are. Co.ao for commercial companies. Ed.ao for educational institutions, . Og.ao for -profit organizations and. Gv.ao for the government of the country. Persons and companies whose headquarters are located outside of Angola, only remains the ending. It.ao reserved ( for international). Overall, may be long and contain only alphanumeric characters a. Ao- domain between two and 63 characters.