What powers 
postcovidonderzoek.nl?
Last seen Sep 2026 · 14 technologies across 9 categories
Analytics
Piwik PRO Core
since Jul 2024
Development
Turbopack
since Apr 2026
JavaScript frameworks
Miscellaneous
Open Graph
since Jul 2024
Webpack
since Jul 2024
Performance
Priority Hints
since Jul 2024
Programming languages
Node.js
since Jul 2024
Security
HSTS
since Jul 2024
UI frameworks
Web servers
Nginx
since Jul 2024
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 73% phone
- 27% desktop
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.46 / 10 · ranked #936,799 of all domains
23 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Dutch
- Weight: 0.6 MB · 29 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on SURFNET-NL SURFnet, The Netherlands (131.224.245.36, IPv6)
- DNS: ssc-campus.nl
- Email: rivm.nl
- Email security: no SPF record, no DMARC record, DNSSEC signed
- SSL: HARICA, ECDSA P256, expires Feb 2027
- Common Crawl link graph: rank 7,079,809, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Turbopack Apr 2026