What powers 
debibliotheekopschool.nl?
Last seen Sep 2026 · 6 technologies across 6 categories
CMS
Miscellaneous
Programming languages
Security
Web servers
Webmail
AI Crawlers
Blocks 9 of 33 AI crawlers we track by name in its robots.txt. Checked Oct 2026.
Training crawlers
- Bytespider Blocked
- ClaudeBot Blocked
- GPTBot Blocked
- ImagesiftBot Blocked
- meta-externalagent Blocked
Search and AI assistants
- Amazonbot Blocked
- Claude-SearchBot Blocked
- OAI-SearchBot Blocked
User-request fetchers
- ChatGPT-User Blocked
The other 24 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
9 of 33 AI crawlers blocked
Audience
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.32 / 10 · ranked #189,438 of all domains
117 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.4 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 100 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Dutch (Netherlands)
- Weight: 0.6 MB · 21 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Microsoft (20.23.2.223)
- DNS: surfnet.nl
- Email: Google Workspace
- Email security: SPF, DMARC reject, DNSSEC signed, CAA, MTA-STS
- SSL: HARICA, ECDSA P256, expires Feb 2027
- Common Crawl link graph: rank 2,365,616, 6 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.debibliotheekopschool.nl | 6 |
| pro.debibliotheekopschool.nl | 5 |