What powers kasteelvalkenburg.nl?
Last seen Aug 2026 · 47 technologies across 22 categories
Analytics
Caching
CDN
CMS
Cookie compliance
Databases
Font scripts
Issue trackers
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Miscellaneous
Performance
Programming languages
Security
Tag managers
UI frameworks
Video players
Web servers
Webmail
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
- 87% phone
- 10% desktop
- 3% tablet
Netherlands
Germany
Belgium
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.09 / 10 · ranked #513,574 of all domains
70 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.6 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Dutch (Netherlands)
- Weight: 2.7 MB · 166 requests
- WordPress theme: hello-elementor · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Kasteelruïne en Fluweelengrot Valkenburg (Fluweelengrot on Wikidata)
- Country: Netherlands
- Profiles: Facebook, Instagram, YouTube
From the homepage's own structured data (Sep 2026) and Wikidata (CC0).
Infrastructure
- Hosted on HOASTED (212.125.139.5)
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC quarantine
- SSL: Google Trust Services, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 783,458, 3 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.kasteelvalkenburg.nl | 28 |
| tickets.kasteelvalkenburg.nl | 25 |
Full technology history →
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Recent changes
- dropped Preact Aug 2026
- dropped Weglot Aug 2026
- detected Twitter Emoji (Twemoji) Jan 2026