All TLDs / .su
What is .su?
Registry operator: Russian Institute for Development of Public Networks (ROSNIIROS) — per the IANA root database.
Source: IANA root zone database, checked August 23, 2026.
Is .su a real domain extension?
Yes — .su is a real top-level domain. It's present in the official IANA DNS root zone, which is the authoritative list of every live TLD on the internet.
Who runs .su?
.su is operated by Russian Institute for Development of Public Networks (ROSNIIROS), the registry responsible for the former Soviet Union, per the IANA root database.
What is .su used for?
.su is the extension tied to the former Soviet Union. Many country codes are also used generically for branding when the letters spell something useful.
Can anyone register a .su domain?
Generally yes — .su is open through accredited registrars, though some country registries require local presence or ID. Availability of a specific name depends on whether it's already taken.
.su and the former Soviet Union
.su is the country-code top-level domain assigned to the former Soviet Union, administered by the registry Russian Institute for Development of Public Networks (ROSNIIROS).
.su is an Internet country code top-level domain (ccTLD) that was designated for the Soviet Union on 19 September 1990. Even though the Soviet Union itself was dissolved 15 months later, the .su top-level domain remains in use to the present day. It is administered by the Russian Institute for Public Networks.
Source: Wikipedia — .su (CC BY-SA)
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