What powers rkcs.org?
Last seen Jun 2026 · 36 technologies across 17 categories
Analytics
Google Analytics
since May 2020
CDN
jQuery CDN
since Feb 2022
jsDelivr
since Sep 2020
CMS
WordPress
since Jan 2019
Databases
MySQL
since Jan 2019
MailChimp
since Jan 2019
Font scripts
Google Font API
since Jan 2019
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
RSS
since May 2023
Operating systems
Windows Server
since Jan 2019
Programming languages
Security
UI frameworks
Semantic UI
since May 2020
Video players
YouTube
since Apr 2020
Web Server Extensions
Web servers
Nginx
since May 2023
Webmail
Apple iCloud Mail
since Dec 2023
Microsoft 365
since Aug 2022
WordPress plugins
Smart Slider 3
since Sep 2022
Smash Balloon Instagram Feed
since May 2023
WordPress Super Cache
since May 2023
Audience
- 78% phone
- 22% desktop
Curaçao
Netherlands
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.20 / 10 · ranked #9,839,171 of all domains
3 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.2 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Dutch (Netherlands)
- CDN: Google
- Weight: 2.8 MB · 65 requests
- WordPress theme: flatsome (child: flatsome-child) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.rkcs.org | 28 |
| rkcs.org | 19 |
| aanmeldingfo.rkcs.org | 13 |
| aanmeldingvsbopap.rkcs.org | 13 |
| ouderportaal.rkcs.org | 13 |
| profectusfo.rkcs.org | 13 |
| profectusvsbo.rkcs.org | 11 |
| aanmeldingsbo.rkcs.org | 10 |
| ouderportaalfo.rkcs.org | 7 |
Full technology history →
Report an incorrect detection