What powers kempler-instituut.nl?
Last seen Sep 2026 · 28 technologies across 13 categories
Analytics
Caching
CMS
Databases
Ecommerce
Font scripts
JavaScript libraries
Miscellaneous
Performance
Programming languages
Web servers
WordPress plugins
WordPress themes
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 Sep 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
3.26 / 10 · ranked #1,179,526 of all domains
17 referring domains · OpenPageRank
Core Web Vitals
| LCP | 4.2 s |
| INP | 75 ms |
| CLS | 0.05 |
| TTFB | 3400 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Dutch (Netherlands)
- Weight: 2.9 MB · 113 requests
- WordPress theme: oceanwp (child: oceanwp-child-theme-master) · all themes
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on PREVIDER-AS (141.138.169.224)
- Email: no MX record returned
- Email security: SPF (soft fail), DMARC monitor only, DNSSEC signed
- SSL: Let's Encrypt, RSA 4096, expires Nov 2026
- Common Crawl link graph: rank 17,766,926
- Verified with: Microsoft 365
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 Font Awesome Aug 2026
- dropped Moment.js Aug 2026
- dropped React Aug 2026
- dropped React Router Aug 2026
- dropped ActiveCampaign Jul 2026
- dropped Bootstrap Jul 2026
- dropped cdnjs Jul 2026
- dropped Cloudflare Jul 2026
- dropped Popper Jul 2026
- detected Preact Jul 2026
- dropped Yoast SEO Jul 2026
- detected Google Analytics Jun 2026
- detected Isotope Jun 2026
- detected Moment.js Jun 2026
- detected RankMath SEO Jun 2026
- detected React Jun 2026
- detected React Router Jun 2026
- detected Site Kit Jun 2026
- detected Twitter Emoji (Twemoji) Feb 2026
- dropped Google Analytics Jan 2026
- dropped Google Tag Manager Jan 2026
- dropped Performance Lab Jan 2026
- dropped Site Kit Jan 2026