What powers 
isbg.nl?
Last seen Sep 2026 · 22 technologies across 14 categories
Analytics
CDN
CMS
Databases
Font scripts
JavaScript libraries
Marketing automation
Miscellaneous
Programming languages
Security
SEO
Tag managers
WordPress plugins
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
- 100% phone
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.96 / 10 · ranked #600,928 of all domains
38 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| CLS | 0 |
| TTFB | 1500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Dutch (Netherlands)
- CDN: Cloudflare
- Weight: 1.0 MB · 30 requests
- WordPress theme: isbg · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- ISBG - Instituut Slachtoffers Beroepsziekten door Gevaarlijke stoffen
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Cloudflare (104.21.96.27, IPv6)
- DNS: Cloudflare DNS
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC quarantine, DNSSEC signed
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 7,503,655, 3 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
- dropped Font Awesome Sep 2026
- detected Twitter Emoji (Twemoji) Aug 2026
- detected Cloudflare Browser Insights Nov 2025