What powers 
natuurkunde.nl?
Last seen Sep 2026 · 15 technologies across 14 categories
Analytics
CDN
jsDelivr
since Dec 2020
JavaScript frameworks
React
since Dec 2020
JavaScript graphics
JavaScript libraries
Marketing automation
MailChimp
since Dec 2020
Miscellaneous
Open Graph
since Sep 2022
SWFObject
since Aug 2018
Operating systems
Ubuntu
since Aug 2018
Programming languages
Ruby
since Aug 2018
Rich text editors
Security
HSTS
since Sep 2022
UI frameworks
Web frameworks
Ruby on Rails
since Aug 2018
Web servers
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 53% desktop
- 44% phone
- 3% tablet
Netherlands
Belgium
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.20 / 10 · ranked #456,849 of all domains
72 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Dutch
- Weight: 2.1 MB · 25 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on DigitalOcean (188.166.128.167)
- DNS: nikhef.nl
- Email: soverin.net
- Email security: SPF (neutral), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 712,951, 4 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted