What powers 
nnv.nl?
Last seen Aug 2026 · 2 technologies across 2 categories
AI Crawlers
Blocks 1 of 33 AI crawlers we track by name in its robots.txt. Checked Sep 2026.
Search and AI assistants
- Amazonbot Blocked
The other 32 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 checked
- ai.txt not checked
AI Crawlers
1 of 33 AI crawlers blocked
Audience
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.90 / 10 · ranked #653,273 of all domains
45 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Dutch
- Weight: 0.2 MB · 49 requests
- Structured data: Microdata
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Nederlandse Natuurkundige Vereniging
- Country: Netherlands
From Wikidata (CC0).
Infrastructure
- Hosted on TRUESERVER-AS TrueServer BV AS number (213.193.247.32)
- DNS: nikhef.nl
- Email: soverin.net
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 811,324, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped Django Aug 2026
- dropped Google Analytics Aug 2026
- dropped Google Hosted Libraries Aug 2026
- dropped jQuery Aug 2026
- dropped Modernizr Aug 2026
- dropped Nginx Aug 2026
- dropped Python Aug 2026
- dropped Ubuntu Aug 2026
- dropped Underscore.js Aug 2026
- dropped VideoJS Aug 2026