What powers 
nienhuis.com?
Last seen Sep 2026 · 25 technologies across 16 categories
Advertising
Analytics
CDN
Cookie compliance
JavaScript frameworks
JavaScript libraries
Marketing automation
Miscellaneous
PaaS
Programming languages
RUM
Security
Tag managers
UI frameworks
Video players
Webmail
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
- 62% desktop
- 38% phone
United States
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.50 / 10 · ranked #890,324 of all domains
55 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.7 s |
| INP | 100 ms |
| CLS | 0.05 |
| TTFB | 1300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Weight: 6.3 MB · 218 requests
- Structured data: JSON-LD, Microdata
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Nienhuis (Nienhuis Montessori on Wikidata)
- Founded: 1929
- Sector: publishing
- Country: Netherlands
From the homepage's own structured data (Oct 2026) and Wikidata (CC0).
Infrastructure
- Hosted on Microsoft (51.136.127.75)
- DNS: Azure DNS
- Email: Microsoft 365
- Email security: no SPF record, DMARC monitor only, CAA
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 2,307,274, 3 hosts
- Verified with: Google, Microsoft 365
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
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Recent changes
- detected Cloudflare Sep 2026
- detected Cloudflare Bot Management Sep 2026
- detected Vimeo Sep 2026
- dropped Cart Functionality Aug 2026
- dropped Cloudflare Aug 2026
- dropped Cloudflare Bot Management Aug 2026
- detected core-js Aug 2026
- detected Facebook Pixel Aug 2026
- dropped Vimeo Aug 2026