What powers zwem4daagse.nl?
Last seen Sep 2026 · 14 technologies across 11 categories
CDN
Google Hosted Libraries
since May 2024
Font scripts
Google Font API
since May 2024
JavaScript libraries
Maps
Google Maps
since May 2024
Miscellaneous
Open Graph
since May 2024
Operating systems
Windows Server
since Feb 2019
Rich text editors
CKEditor
since May 2024
Security
HSTS
since Sep 2022
UI frameworks
Bootstrap
since May 2024
Web frameworks
Web servers
AI Crawlers
robots.txt could not be read at the last check (Sep 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not checked
- ai.txt not checked
AI Crawlers
Policy unknown
Audience
- 80% phone
- 20% desktop
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.40 / 10 · ranked #1,008,231 of all domains
27 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.2 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Dutch
- Weight: 2.4 MB · 85 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on INTERCONNECT Interconnect Services B.V. (213.206.248.219, IPv6)
- DNS: interconnect-dns.nl
- Email: interconnect.nl
- Email security: no SPF record, no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 7,660,029, 7 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected HSTS Apr 2026