What powers z-f-c.de?
Last seen Sep 2026 · 20 technologies across 12 categories
Analytics
CDN
JavaScript frameworks
JavaScript libraries
Miscellaneous
Performance
Programming languages
Security
Tag managers
UI frameworks
Video players
Web frameworks
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
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.78 / 10 · ranked #2,028,554 of all domains
25 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.4 s |
| INP | 50 ms |
| CLS | 0.1 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: German
- CDN: Cloudflare
- Weight: 2.0 MB · 81 requests
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Zentrum für Chemie
- Industry: Education (declares
EducationalOrganization)
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Cloudflare (104.21.70.198, IPv6)
- DNS: Cloudflare DNS
- Email: z-f-c.de
- Email security: SPF (hard fail), no DMARC record
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Nov 2026
- Common Crawl link graph: rank 9,981,853, 2 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
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Recent changes
- dropped Heroku Sep 2026