What powers 
prof-held.de?
Last seen Sep 2026 · 23 technologies across 17 categories
Analytics
Appointment scheduling
CMS
Cookie compliance
Hosting
JavaScript libraries
Live chat
Miscellaneous
Operating systems
Performance
Programming languages
Security
Tag managers
UI frameworks
Video players
Web servers
Webmail
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 Oct 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
- Oct 2026 *: Restricted (was Blocked)
- Sep 2026 *: Blocked (was Restricted)
- Sep 2026 *: Restricted (was Blocked)
- Aug 2026 *: Blocked (was Restricted)
- Aug 2026 *: Restricted (was Blocked)
AI Crawlers
No AI crawlers blocked
Audience
- 100% phone
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.47 / 10 · ranked #928,882 of all domains
60 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.6 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: German (Germany)
- Weight: 0.9 MB · 46 requests
- Structured data: JSON-LD, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Industry: Healthcare (declares
MedicalBusiness)
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on GD-EMEA-DC-SXB1 (178.77.74.113)
- DNS: STRATO
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC reject
- SSL: Let's Encrypt, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 17,399,782
- Verified with: Microsoft 365
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| lp.prof-held.de | 20 |
| www.prof-held.de | 17 |
Full technology history →
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Recent changes
- dropped Trustindex Feb 2026