What powers izb.nl?
Last seen Aug 2026 · 21 technologies across 15 categories
Analytics
CMS
Databases
Font scripts
JavaScript frameworks
JavaScript libraries
Miscellaneous
Programming languages
Security
SEO
Tag managers
Video players
Web servers
Webmail
AI Crawlers
Blocks 1 of 33 AI crawlers we track by name in its robots.txt. Checked Sep 2026.
Search and AI assistants
- Amazonbot Blocked
The other 32 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
1 of 33 AI crawlers blocked
Audience
- 70% phone
- 30% desktop
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.02 / 10 · ranked #554,120 of all domains
40 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 2.6 MB · 76 requests
- Structured data: Microdata
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on TRUESERVER-AS TrueServer BV AS number (213.193.247.32)
- DNS: trueserver.nl
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 970,542, 10 hosts
- Verified with: Google, Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| handleidingen.izb.nl | 12 |
| www.izb.nl | 10 |
| podwalks.izb.nl | 5 |
| jongerenrapport.izb.nl | 3 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped core-js May 2026
- dropped Facebook Pixel May 2026
- dropped Google Analytics May 2026
- detected Sendgrid May 2026
- detected Matomo Analytics Apr 2026
- detected Stimulus Mar 2026