What powers 
herdt.com?
Last seen Oct 2026 · 32 technologies across 20 categories
Advertising
Analytics
CDN
CMS
Cookie compliance
Databases
Hosting
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Miscellaneous
Operating systems
Programming languages
SEO
UI frameworks
Video players
Web frameworks
Web servers
Webmail
WordPress plugins
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 Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 66% desktop
- 34% phone
Germany
Switzerland
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.74 / 10 · ranked #741,811 of all domains
58 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: German
- CDN: Cloudflare
- Weight: 1.1 MB · 65 requests
- WordPress theme: avada · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- HERDT-Verlag für Bildungsmedien GmbH (Herdt-Verlag on Wikidata)
- Founded: 1991
- Country: Germany
- Profiles: YouTube, LinkedIn
From the homepage's own structured data (Oct 2026) and Wikidata (CC0).
Infrastructure
- Hosted on Cloudflare (104.20.43.32, IPv6)
- DNS: Cloudflare DNS
- Email: Microsoft 365
- Email security: SPF (soft fail), DMARC monitor only, DNSSEC signed, CAA
- SSL: Certum, RSA 4096, wildcard, expires Mar 2027
- Common Crawl link graph: rank 8,805,495, 9 hosts
- Verified with: Google, Microsoft 365, Zoho
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| herdt.com | 18 |
| cms.herdt.com | 13 |
| shop.herdt.com | 10 |
| office-quiz.herdt.com | 3 |
Full technology history →
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Recent changes
- dropped Priority Hints Oct 2026
- dropped Twitter Emoji (Twemoji) Jul 2026
- detected GSAP Apr 2026
- detected Twitter Emoji (Twemoji) Apr 2026