What powers willemjacob.nl?
Last seen Sep 2026 · 7 technologies across 6 categories
Analytics
Hosting
JavaScript frameworks
JavaScript libraries
Miscellaneous
Web servers
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.00 / 10 · ranked #1,593,775 of all domains
20 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Dutch (Netherlands)
- Weight: 6.8 MB · 16 requests
- Structured data: JSON-LD
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Willem Jacob
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Hetzner (91.98.98.139)
- DNS: Hetzner
- Email: groningenserver.nl
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 15,908,629, 2 hosts
DNS records as swept Sep 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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