What powers 
stbib-koeln.de?
Last seen Aug 2026 · 8 technologies across 5 categories
Analytics
INFOnline
since Jun 2018
Matomo Analytics
since May 2017
JavaScript Frameworks
Security
HSTS
since Sep 2022
Web Frameworks
Web Servers
Apache HTTP Server
since Jun 2018
AI Crawlers
Blocks all crawlers by default in robots.txt (User-agent: *). Checked Sep 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
All crawlers blocked
Audience
- 81% phone
- 12% desktop
- 7% tablet
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.92 / 10 · ranked #635,727 of all domains
73 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 275 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 0.3 MB · 31 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on NETCOLOGNE (194.8.216.2)
- DNS: netcologne.de
- Email: ensec.koeln
- Email security: SPF (hard fail), DMARC quarantine
- SSL: Certum, RSA 2048, wildcard, expires Nov 2026
- Common Crawl link graph: rank 720,058, 4 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.stbib-koeln.de | 6 |
| katalog.stbib-koeln.de | 2 |