What powers henn.com?
Last seen Aug 2026 · 16 technologies across 10 categories
Analytics
CMS
JavaScript frameworks
JavaScript libraries
Miscellaneous
Programming languages
Security
UI frameworks
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
- 64% desktop
- 36% phone
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.16 / 10 · ranked #474,732 of all domains
165 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| INP | 25 ms |
| CLS | 0.05 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 4.1 MB · 30 requests
- Structured data: JSON-LD
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Henn GmbH
- Founded: 1979
- Sector: architecture
- Country: Germany
From Wikidata (CC0).
Infrastructure
- Hosted on DE-FIRSTCOLO firstcolo.net (212.224.92.149)
- DNS: m-online.net
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC reject
- SSL: Let's Encrypt, ECDSA P256, expires Nov 2026
- Common Crawl link graph: rank 583,612, 7 hosts
- Verified with: Adobe, Apple Business, Atlassian, Autodesk, DocuSign, GlobalSign, Microsoft 365, Miro and 1 more
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Microsoft 365 Jun 2026
- dropped Apache HTTP Server Jan 2026
- detected Nginx Dec 2025