What powers vcatraint.nu?

Last seen Oct 2026 · 31 technologies across 16 categories

Analytics

Google Analytics
since Oct 2022

Caching

Redis Object Cache
since Dec 2025
WP Rocket
since Jun 2023

CDN

Cloudflare
since Jan 2023

CMS

WordPress
since Oct 2022

Databases

MySQL
since Oct 2022
Redis
since Dec 2025

Font scripts

Font Awesome
since May 2023
Google Font API
since Oct 2022
Twitter Emoji (Twemoji)
since Oct 2022

Hosting panels

Plesk
since Aug 2024

JavaScript libraries

core-js v3.32.0
since Oct 2022
Isotope
since Oct 2022
jQuery v3.7.1
since Oct 2022
jQuery Migrate v3.4.1
since Oct 2022
jQuery UI v1.14.2
since Oct 2022
Slick
since Oct 2022

Miscellaneous

Gravatar
since Oct 2022
Open Graph
since Oct 2022
RSS
since Dec 2022

Performance

Priority Hints
since Jan 2024

Programming languages

PHP
since Oct 2022

Security

HSTS
since Jun 2023

Web servers

Nginx
since Oct 2022

Webmail

Microsoft 365
since Oct 2022

WordPress plugins

Elementor v3.21.8
since Oct 2022
LearnDash v4.11.0
since Oct 2023
Perfmatters
since May 2024
Site Kit v1.116.0
since Oct 2022
Ultimate Addons for Elementor v1.36.36
since Apr 2023

WordPress themes

Astra v3.6.9
since Oct 2022

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 Oct 2026.

  • robots.txt found
  • llms.txt not found
  • ai.txt not found

See who blocks each AI crawler across the web

AI Crawlers

No AI crawlers blocked

Full breakdown

Audience

  • 52% desktop
  • 48% phone
  • Netherlands

Where the site's Chrome visitors come from, largest estimated audience first.

Open Page Rank

1.77 / 10 · ranked #4,534,981 of all domains

13 referring domains · OpenPageRank

Page

  • Language: Dutch (Netherlands)
  • Weight: 1.9 MB · 97 requests
  • WordPress theme: astra · all themes
  • Structured data: JSON-LD, Microdata, OpenGraph

Homepage as crawled by the HTTP Archive, Oct 2026.

Organisation

  • Vrijwilligers Centrale Amsterdam

From the homepage's own structured data (Oct 2026).

Infrastructure

DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted

Full technology history →
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