What powers ifsr.de?
Last seen Oct 2026 · 21 technologies across 12 categories
Caching
CDN
JavaScript frameworks
JavaScript libraries
Miscellaneous
PaaS
Programming languages
Security
Static site generator
UI frameworks
Video players
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 Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 79% phone
- 21% desktop
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.31 / 10 · ranked #2,859,009 of all domains
14 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.5 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 100 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: German
- Weight: 0.3 MB · 15 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on DFN Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. (141.30.30.194, IPv6)
- DNS: inwx.de
- Email: ifsr.de
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 1,912,132, 17 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| stream.ifsr.de | 10 |
| www.ifsr.de | 6 |
| ifsr.de | 5 |
| ese.ifsr.de | 4 |
| kurse.ifsr.de | 4 |
| stoffkiste.ifsr.de | 3 |
| ftp.ifsr.de | 2 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped jsDelivr Jun 2026
- dropped Google Font API Apr 2026