What powers isr.nl?
Last seen Aug 2026 · 9 technologies across 7 categories
Analytics
Google Analytics
since Jan 2021
CDN
Cloudflare
since Mar 2024
JavaScript libraries
Splide
since Mar 2024
Miscellaneous
Open Graph
since Sep 2022
PWA
since Mar 2024
Security
Cloudflare Bot Management
since Mar 2024
HSTS
since Sep 2022
Video players
Vimeo
since Mar 2024
Web servers
Apache HTTP Server
since Jan 2021
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 found
- ai.txt not found
AI Crawlers
Policy unknown
Audience
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.69 / 10 · ranked #351,575 of all domains
69 referring domains · OpenPageRank
Core Web Vitals
| LCP | 4.1 s |
| CLS | 0 |
| TTFB | 3600 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Dutch
- Weight: 1.5 MB · 27 requests
- Structured data: Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on CLARANET-AS ClaraNET LTD (212.61.68.206)
- DNS: provalue.nl
- Email: Cloudflare Email Security
- Email security: no SPF record, no DMARC record, DNSSEC signed, CAA
- SSL: DigiCert, RSA 4096, expires Dec 2026
- Common Crawl link graph: rank 7,441,113, 3 hosts
DNS records as swept Aug 2026, certificate as seen Sep 2026. How the web is hosted