What powers 
onderwatersport.org?
Last seen Aug 2026 · 29 technologies across 16 categories
Analytics
CDN
CMS
Databases
Font scripts
JavaScript libraries
Miscellaneous
PaaS
Programming languages
Security
Tag managers
UI frameworks
Web servers
Webmail
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 67% phone
- 33% desktop
Netherlands
Belgium
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.21 / 10 · ranked #449,649 of all domains
62 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.8 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 1400 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Dutch (Netherlands)
- Weight: 4.8 MB · 84 requests
- WordPress theme: _tk-master (child: nob) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Nederlandse Onderwatersport Bond
- Founded: 1962
- Country: Netherlands
From Wikidata (CC0).
Infrastructure
- Hosted on SNEL (193.34.167.146, IPv6)
- DNS: microsoftonline.com
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 3,421,181, 3 hosts
- Verified with: Microsoft Dynamics 365, Google, Meta Business, Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
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Recent changes
- detected Twitter Emoji (Twemoji) Jan 2026