What powers 
dahlem.de?
Last seen Aug 2026 · 11 technologies across 9 categories
JavaScript libraries
Miscellaneous
Operating systems
Photo galleries
Programming languages
Reverse proxies
Rich text editors
Security
Web servers
AI Crawlers
Blocks 17 of 33 AI crawlers we track by name in its robots.txt. Checked Sep 2026.
Training crawlers
- AI2Bot Blocked
- Applebot-Extended Blocked
- Bytespider Blocked
- CCBot Blocked
- ClaudeBot Blocked
- cohere-training-data-crawler Blocked
- Diffbot Blocked
- FacebookBot Blocked
- Google-Extended Blocked
- GPTBot Blocked
- ImagesiftBot Blocked
- img2dataset Blocked
- meta-externalagent Blocked
- PanguBot Blocked
- Webzio-Extended Blocked
Search and AI assistants
- Amazonbot Blocked
- PetalBot Blocked
The other 16 AI crawlers we track are not mentioned and stay allowed by default.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 google-extended added to robots.txt
- Sep 2026 cohere-training-data-crawler added to robots.txt
- Sep 2026 duckassistbot removed from robots.txt
- Sep 2026 youbot removed from robots.txt
- Sep 2026 gptbot added to robots.txt
- Sep 2026 meta-externalfetcher removed from robots.txt
AI Crawlers
17 of 33 AI crawlers blocked
Audience
- 83% phone
- 17% desktop
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.44 / 10 · ranked #960,908 of all domains
47 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: German (Germany)
- Weight: 3.0 MB · 45 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Dahlem
- Country: Germany
From Wikidata (CC0).
Infrastructure
- Hosted on KDVZ-FRECHEN (185.155.109.135)
- Email: kdvz-frechen.de
- Email security: SPF (hard fail), DMARC quarantine
- SSL: Let's Encrypt, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 1,081,798, 3 hosts
- Verified with: Microsoft 365, SwissSign
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.dahlem.de | 7 |
| dahlem.de | 6 |
Full technology history →
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