.su is an Internet country code top-level domain (ccTLD) that was designated for the Soviet Union (USSR) on 19 September 1990. Even though the Soviet Union itself was dissolved a mere 15 months later, the .su top-level domain remains in use today with over 100,000 .su domains . It is administered by the Russian Institute for Public Networks (RIPN, or RosNIIROS in Russian transcription).