What powers h3o.nl?
Last seen Oct 2026 · 29 technologies across 18 categories
A/B Testing
Analytics
Google Analytics
since Mar 2020
CDN
Cloudflare
since Apr 2023
CMS
Databases
MySQL
since Apr 2023
Font scripts
Twitter Emoji (Twemoji)
since Apr 2023
Hosting
Kinsta
since Apr 2023
WordPress Multisite
since Jul 2023
JavaScript libraries
Miscellaneous
Page builders
WordPress Block Editor
since Jul 2024
Performance
Priority Hints
since Oct 2023
Programming languages
PHP
since Apr 2023
Security
Cloudflare Bot Management
since May 2023
HSTS
since Sep 2022
Tag managers
Google Tag Manager
since Dec 2024
Video players
Vimeo
since May 2023
Webmail
Apple iCloud Mail
since Jan 2023
WordPress plugins
Smash Balloon Instagram Feed
since Oct 2025
WordPress themes
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 found
- ai.txt not found
- Sep 2026 *: Allowed (was Restricted)
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Audience
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.35 / 10 · ranked #1,061,633 of all domains
13 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.2 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: Dutch (Netherlands)
- CDN: Cloudflare
- Weight: 2.0 MB · 70 requests
- WordPress theme: astra (child: astra-child) · all themes
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- H3o Dordrecht (H3O on Wikidata)
- Country: Netherlands
From the homepage's own structured data (Oct 2026) and Wikidata (CC0).
Infrastructure
- Hosted on Cloudflare (162.159.135.42)
- DNS: argewebhosting.eu
- Email: Barracuda
- Email security: SPF (hard fail), DMARC reject, DNSSEC signed
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Jan 2027
- Common Crawl link graph: rank 16,885,469, 21 hosts
- Verified with: Apple Business, Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.h3o.nl | 26 |
| desterrekijker.h3o.nl | 24 |
| hetkristal.h3o.nl | 24 |
| leonardoschool.h3o.nl | 24 |
| sbodetoekomst.h3o.nl | 23 |
| defontein.h3o.nl | 21 |
| deregenboogcentrum.h3o.nl | 21 |
| deregenboog.h3o.nl | 20 |
| drhbavinckschool.h3o.nl | 20 |