What powers sibleiden.nl?
Last seen Oct 2026 · 28 technologies across 16 categories
Analytics
Google Analytics
since Oct 2020
CDN
Bunny
since Oct 2025
CMS
Cookie compliance
Databases
MySQL
since Oct 2020
Font scripts
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
RSS
since Dec 2022
Page builders
wpBakery
since Oct 2021
Performance
Priority Hints
since May 2024
Programming languages
PHP
since Oct 2020
Security
reCAPTCHA
since Oct 2020
Translation
Weglot
since Oct 2025
UI frameworks
Bootstrap
since Oct 2020
Video players
YouTube
since Oct 2020
WordPress plugins
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.69 / 10 · ranked #5,054,119 of all domains
6 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Dutch (Netherlands)
- Weight: 13.9 MB · 173 requests
- WordPress theme: stack (child: stack-child) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- SIB-Leiden
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on CLDIN-NL Your Hosting B.V. part of Your.Online (77.94.250.180, IPv6)
- DNS: vevida.net
- Email: vevida.com
- Email security: SPF (soft fail), no DMARC record, DNSSEC signed, CAA
- SSL: Let's Encrypt, RSA 2048, wildcard, expires Oct 2026
- Common Crawl link graph: rank 12,359,275, 3 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Sep 2026. How the web is hosted