What is .sina?
Brand TLDs operate under Specification 13 of ICANN's registry agreement. It lets a trademark owner keep every second-level name for itself, so you won't find .sina names for sale at any registrar.
.sina entered the DNS root zone on March 30, 2016, 10 years ago. It came out of ICANN's New gTLD Program, the 2012 application round that grew the root from 22 generic TLDs to well over a thousand.
Sina Corporation also runs 2 other TLDs, including .weibo and .微博.
On the technical side, .sina is served by 5 authoritative name servers, 3 of them reachable over IPv6. It is also DNSSEC-signed: the root zone carries a DS record for .sina, which lets validating resolvers check its answers cryptographically. Registration data is published over RDAP and WHOIS (the WHOIS server is whois.nic.sina).
Same registry, other endings
2 other TLDs share this operator.
.sina FAQ
What country is .sina?
None. .sina is a generic top-level domain, so it isn't tied to any country.
Who owns the .sina domain extension?
Sina Corporation operates .sina as its registry, under a registry agreement with ICANN.
When was .sina created?
.sina was delegated to the DNS root zone on March 30, 2016.
Is .sina a valid domain?
Yes. .sina is an active top-level domain in the DNS root zone, delegated in 2016, so .sina addresses work in every browser.
Can I buy a .sina domain?
No. .sina is a brand TLD under ICANN Specification 13, so names are reserved for Sina Corporation.
Is .sina DNSSEC-signed?
Yes, the root zone holds a DS record for .sina.
Sources
Data from IANA root zone version 2026102000. Last changed August 13, 2026. Spotted something wrong? Tell us.
