What powers semi.ac.cn?
Last seen Aug 2026 · 12 technologies across 8 categories
Analytics
JavaScript Frameworks
JavaScript libraries
Operating Systems
Programming languages
UI frameworks
Web Frameworks
Web Servers
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt found
- llms-full.txt found
- ai.txt found
- Sep 2026 * removed from robots.txt
AI Crawlers
No AI crawlers blocked
Standards: llms.txt, llms-full.txt, ai.txt
Audience
- 100% desktop
United States
China
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.15 / 10 · ranked #1,339,667 of all domains
38 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| CLS | 0 |
| TTFB | 100 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 0.3 MB · 35 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on CSTNET-AS-AP Computer Network Information Center of Chinese Academy of Sciences CNIC-CAS (159.226.228.1)
- Email: cstnet.cn
- Email security: no SPF record, no DMARC record
- SSL: Beijing Xinchacha Credit Management Co., Ltd., RSA 2048, wildcard, expires Oct 2026
- Common Crawl link graph: rank 730,826, 19 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| oa.semi.ac.cn | 6 |
| lab.semi.ac.cn | 4 |
| wv.semi.ac.cn | 2 |
| www.semi.ac.cn | 2 |
Full technology history →
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Recent changes
- dropped DataTables Oct 2025
- dropped jQuery UI Oct 2025
- dropped Moment.js Oct 2025
- dropped Nginx Oct 2025
- dropped Ruby Oct 2025
- dropped Ruby on Rails Oct 2025