All TLDs / .tui

What is .tui?

The short answer
.tui is a brand top-level domain, operated by TUI AG. It's a “dot-brand” registry (ICANN Spec 13) — reserved for the operator's own use, so it isn't open for the public to register. It's live in the official IANA DNS root zone.
Type
Brand (dot-brand)
Registration
Closed (brand)
In DNS root
Yes
Operator
TUI AG

Source: IANA root zone database, checked October 18, 2026.

Is .tui a real domain extension?

Yes — .tui 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 .tui?

.tui is operated by TUI AG, per the IANA root database.

What is .tui used for?

.tui is a dot-brand registry — it's reserved for TUI AG and isn't used for third-party websites.

Can anyone register a .tui domain?

No. .tui is a closed brand registry, so it isn't available for public registration. A registrar search will confirm the current policy for any specific name.