All TLDs / .sina

What is .sina?

The short answer
.sina is a brand top-level domain, operated by Sina Corporation. 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
Sina Corporation

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

Is .sina a real domain extension?

Yes — .sina 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 .sina?

.sina is operated by Sina Corporation, per the IANA root database.

What is .sina used for?

.sina is a dot-brand registry — it's reserved for Sina Corporation and isn't used for third-party websites.

Can anyone register a .sina domain?

No. .sina 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.