What powers 
desy.de?
Last seen Oct 2026 · 99 technologies across 30 categories
Analytics
Authentication
Caching
CDN
CMS
Digital asset management
DMS
Documentation
Ecommerce
Font scripts
Issue trackers
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Marketing automation
Miscellaneous
Operating systems
Performance
Programming languages
Remote access
Reverse proxies
Rich text editors
Security
UI frameworks
Video players
Web frameworks
Web server extensions
Web servers
Widgets
Wikis
AI Crawlers
Blocks 32 of 33 AI crawlers we track by name in its robots.txt. Checked Nov 2026.
Training crawlers
- AI2Bot Blocked
- Applebot-Extended Blocked
- Bytespider Blocked
- CCBot Blocked
- ClaudeBot Blocked
- cohere-training-data-crawler Blocked
- Diffbot Blocked
- FacebookBot Blocked
- Google-CloudVertexBot Blocked
- Google-Extended Blocked
- GoogleOther Blocked
- GPTBot Blocked
- ImagesiftBot Blocked
- img2dataset Blocked
- meta-externalagent Blocked
- PanguBot Blocked
- SBIntuitionsBot Blocked
- Webzio-Extended Blocked
Search and AI assistants
- Amazonbot Blocked
- Applebot Blocked
- Claude-SearchBot Blocked
- DuckAssistBot Blocked
- OAI-SearchBot Blocked
- PerplexityBot Blocked
- PetalBot Blocked
- YouBot Blocked
User-request fetchers
- ChatGPT-User Blocked
- Claude-User Blocked
- GoogleAgent-Mariner Blocked
- meta-externalfetcher Blocked
- MistralAI-User Blocked
- Perplexity-User Blocked
The other 1 AI crawler we track is not mentioned and only inherits the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 claude-searchbot added to robots.txt
- Sep 2026 claude-user added to robots.txt
- Sep 2026 claude-web added to robots.txt
- Sep 2026 claudebot added to robots.txt
- Sep 2026 webzio-extended added to robots.txt
- Sep 2026 cohere-ai added to robots.txt
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| occam's razor | #7 | 4,200 |
| arkham razor | #7 | 3,200 |
| does light have mass | #2 | 580 |
| photon mass | #1 | 430 |
| why is | #7 | 420 |
| speed of light constant | #2 | 390 |
| do photons have mass | #3 | 350 |
| mass of photon | #2 | 310 |
| c constant speed of light | #2 | 290 |
| gods and titans | #3 | 280 |
| is glass a liquid | #5 | 250 |
| what is the sky blue | #10 | 250 |
| what is the speed of light | #11 | 250 |
| speed of light scientific notation | #3 | 230 |
| tyndall scattering | #7 | 210 |
| the casimir effect | #6 | 180 |
| greek mythology | #53 | 170 |
| who is zeus dad | #7 | 160 |
| zeus hades and poseidon | #2 | 150 |
| titans mythology | #6 | 120 |
| zeus dad | #10 | 110 |
| virtual particles | #4 | 110 |
| what causes gravity | #6 | 98 |
| derivative of position | #3 | 97 |
| who is hermes father | #4 | 86 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
32 of 33 AI crawlers blocked
Audience
- 63% desktop
- 36% phone
- 1% tablet
Germany
United States
India
United Kingdom
France
Italy
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
7.77 / 10 · ranked #11,483 of all domains
1,911 referring domains · OpenPageRank
Search traffic
21,200 est. monthly organic visits (US)
5,134 keywords in Google's top 30
Core Web Vitals
| LCP | 1.6 s |
| INP | 125 ms |
| CLS | 0 |
| TTFB | 1300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: German
- Weight: 2.3 MB · 41 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
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fz-juelich.de 7 shared
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getmonero.org 3 sharedcells.es 4 shared
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Closest technology stacks among the highest-authority sites we track; "shared" counts the distinctive technologies in common.
Organisation
- DESY
- Founded: 1959
- Sector: research
- Country: Germany
From Wikidata (CC0).
Infrastructure
- Hosted on DESY-HAMBURG (131.169.5.106)
- DNS: dfn.de
- Email: dfn.de
- Email security: SPF (neutral), DMARC monitor only, CAA
- SSL: Let's Encrypt, RSA 4096, expires Jan 2027
- Common Crawl link graph: rank 15,659, 500 hosts
- Verified with: Cisco, GlobalSign, Google, Jamf, Microsoft 365
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| desycloud.desy.de | 20 |
| sas.desy.de | 20 |
| syncandshare.desy.de | 17 |
| indico.desy.de | 16 |
| mpl.desy.de | 16 |
| training.desy.de | 16 |
| gitlab.desy.de | 14 |
| notes.desy.de | 13 |
| bib-pubdb1.desy.de | 11 |
| campus.desy.de | 11 |
| docs.desy.de | 11 |
| rt-system.desy.de | 11 |
| wiki.desy.de | 11 |
| wwwiexp.desy.de | 11 |
| confluence.desy.de | 10 |
| desy.de | 10 |
| hbond2025.desy.de | 10 |
| icd.desy.de | 10 |
| petra4.desy.de | 10 |
| sport.desy.de | 10 |
| mms.zeuthen.desy.de | 9 |
| video.desy.de | 9 |
| webcast.desy.de | 9 |
| axion-wimp2022.desy.de | 8 |
Full technology history →
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