The Foundation for Internet Development performed the functions of the .SU domain administrator until July 31, 2020. All information about this activity is left for history.

Registration of second-level domain names in .SU domain is generally available, both individuals and legal entities, and it is held by certified registrars.

Besides registration of domain names consisting of Latin letters, registration of domain names including symbols of Greek, Cyrillic, Armenian, Arabic, Georgian alphabets, and Hebrew is possible.

Procedure of registration and use of domain names is described in Rules for registration of domain names in .SU domain.