What powers 04.si?
Last seen Jun 2026 · 11 technologies across 7 categories
CDN
Cloudflare
since Jan 2023
JavaScript frameworks
Vue.js
since Jan 2023
JavaScript libraries
Message boards
Misskey
since Jan 2023
Miscellaneous
Security
Cloudflare Bot Management
since Jul 2025
HSTS
since Jan 2023
Video players
Plyr
since Mar 2023
Audience
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.10 / 10 · ranked #3,327,398 of all domains
11 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| INP | 75 ms |
| CLS | 0.05 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English (United States)
- Weight: 5.5 MB · 214 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| calc.04.si | 9 |
| misskey.04.si | 9 |