Comprehensive information about all top-level domains (TLDs) including generic, country code, and brand-specific domains.
Showing 12 of 2000 TLDs ( 2000 total)
Sina
The .sina TLD is a brand-specific top-level domain operated by Sina Corporation, primarily used to protect and extend its online brand presence across its portfolio of services including news, microblogging, and mobile value-added services in China and among global Chinese communities.
Restricted to Sina Corporation and its authorized affiliates, subsidiaries, departments, products, campaigns, and personnel.
The .sina extension is a brand top-level domain in the Domain Name System (DNS). It is managed by Sina Corporation. .sina was introduced in 2016. There are currently 3 domains registered under this extension. DNSSEC adoption stands at 33.3%.
Registration pricing for .sina is not publicly listed. Brand TLDs are typically restricted to the owning organization.
The .sina domain was delegated to Sina Corporation on March 28, 2016, under ICANN's New gTLD Program. Sina initially planned to restrict registrations to internal entities for at least three years to protect its brand and minimize operational risk. It has not opened registration to the public and continues to use .sina for its owned digital properties.
Brand TLDs like .sina are part of ICANN's New gTLD Program launched in 2012, which expanded the domain namespace beyond traditional TLDs.
The .sina TLD is commonly used for the following purposes:
3
33.3%
If .sina doesn't meet your needs, consider these alternatives:
| Metric | Value |
|---|---|
| Extension | .sina |
| Type | Brand TLD |
| Total Registrations | 3 |
| DNSSEC Adoption | 33.3% |
| Registration Price | Contact registrar |
| Renewal Price | Contact registrar |
| Registry Operator | Sina Corporation |
| Introduced | 2016-03-28 |
| Restrictions | Restricted to Sina Corporation and its authorized affiliates, subsidiaries, departments, products, campaigns, and personnel. |
Registration density analysis for .sina domains by character length. Currently 1 domains are registered across all lengths.
Total Registered
1
Peak Saturation
0.01%
3-char names
DNSSEC Adoption
100.0%
Top Provider
—
| Length | Registered | % Full | Density |
|---|---|---|---|
| 3 chars | 1 | 0.01% |
Updated daily from zone file analysis. Alpha density = registered / 26^length.
Compare across all TLDs →Only Sina Corporation and its authorized subsidiaries, departments, products, campaigns, or personnel may register .sina domains. No public registration is allowed.
This is a brand TLD exclusively controlled by Sina Corporation. It is not available for public registration.
How does .sina compare to similar top-level domains? This comparison covers pricing, type, and availability to help choose the right domain extension.
View the full TLD Directory to browse all 1,900+ top-level domains with pricing, registration density analysis, and DNSSEC adoption rates.
DNSChkr maintains a comprehensive TLD directory covering all 1,900+ active top-level domains. The data on this page combines multiple authoritative sources to provide information not found in standard TLD listings.
Domain registration counts and density analysis are computed daily from TLD zone files, providing accurate registration statistics rather than estimates.
DNSSEC deployment percentages are measured by scanning actual DNS records across all registered domains in each TLD zone.
Registration, renewal, and transfer prices are checked hourly across multiple accredited registrars and compared automatically.
DNS provider distribution is calculated from nameserver records, showing which hosting providers serve the most domains in each TLD.
Use DNSChkr tools to inspect any .sina domain: run a full DNS health check, check DNS propagation, look up WHOIS records, or verify email authentication.
Disclaimer: The information on this page is sourced from IANA, ICANN, and respective registry operator publications, then structured and formatted with the assistance of AI. While accuracy is a priority, details such as pricing, registration requirements, and policies may change. Always verify with the official registry or an accredited registrar before making registration decisions.