What powers siis.net?
Last seen Aug 2026 · 34 technologies across 20 categories
Advertising
Analytics
CDN
CMS
Databases
Font scripts
Hosting panels
JavaScript libraries
Miscellaneous
Operating systems
Performance
Programming languages
Search engines
Security
Tag managers
UI frameworks
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Web servers
Webmail
Widgets
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 69% desktop
- 31% phone
Spain
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.37 / 10 · ranked #422,572 of all domains
196 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Spanish (Spain)
- Weight: 1.7 MB · 93 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- SIIS Research and Documentation Centre
- Founded: 1972
- Country: Spain
From Wikidata (CC0).
Infrastructure
- Hosted on ACENS_AS Spain Hosting, housing and VPN services (82.194.71.5)
- DNS: lotura.com
- Email: Microsoft 365
- Email security: no SPF record, no DMARC record
- SSL: DigiCert, RSA 2048, wildcard, expires Dec 2026
- Common Crawl link graph: rank 686,024, 20 hosts
DNS records as swept Aug 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.embed.siis.net | 14 |
| katalogoa.siis.net | 13 |
| embed.siis.net | 12 |
| blog.siis.net | 11 |
| covid19.siis.net | 10 |
| www.siis.net | 8 |
| covid19laguntzak.siis.net | 6 |
| mintegia.siis.net | 6 |
Full technology history →
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Recent changes
- detected OpenResty Nov 2025