What powers 
vhs-duisburg.de?
Last seen Aug 2026 · 11 technologies across 8 categories
Analytics
CMS
Cookie compliance
JavaScript libraries
Miscellaneous
Programming languages
Security
UI frameworks
AI Crawlers
Blocks 7 of 33 AI crawlers we track by name in its robots.txt, restricts 16 more. Checked Sep 2026.
Training crawlers
- AI2Bot Blocked
- Bytespider Blocked
- CCBot Blocked
- Diffbot Blocked
- PanguBot Blocked
- Webzio-Extended Blocked
- Applebot-Extended Restricted
- ClaudeBot Restricted
- cohere-training-data-crawler Restricted
- Google-CloudVertexBot Restricted
- Google-Extended Restricted
- GoogleOther Restricted
- GPTBot Restricted
- meta-externalagent Restricted
Search and AI assistants
- PetalBot Blocked
- Amazonbot Restricted
- Applebot Restricted
- DuckAssistBot Restricted
- OAI-SearchBot Restricted
- PerplexityBot Restricted
- YouBot Restricted
User-request fetchers
- ChatGPT-User Restricted
- meta-externalfetcher Restricted
The other 10 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
7 of 33 AI crawlers blocked
Audience
- 80% phone
- 15% desktop
- 6% tablet
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.70 / 10 · ranked #763,577 of all domains
55 referring domains · OpenPageRank
Core Web Vitals
| LCP | 5.5 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 5200 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: German
- Weight: 7.5 MB · 42 requests
- Structured data: Microdata, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on DVV-GMBH-AS (147.28.52.171)
- DNS: duit.de
- Email: duit.de
- Email security: no SPF record, no DMARC record, CAA
- SSL: Sectigo, RSA 4096, expires Jan 2027
- Common Crawl link graph: rank 3,088,531, 3 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| vhs-duisburg.de | 11 |
| www.vhs-duisburg.de | 11 |