What powers sfumato.cz?
Last seen Oct 2026 · 8 technologies across 7 categories
Comment systems
Disqus
since Mar 2022
Editors
DreamWeaver
since Jul 2020
SparkPost
since Jun 2024
JavaScript frameworks
JavaScript libraries
Lightbox
since Jul 2020
Video players
YouTube
since Jul 2020
Web servers
Nginx
since Jun 2024
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
AI Crawlers
No AI crawlers blocked
Audience
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.21 / 10 · ranked #3,079,440 of all domains
10 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| INP | 275 ms |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Weight: 5.6 MB · 140 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on MASTER-AS Czech Republic www.master.cz (77.93.196.12, IPv6)
- DNS: bfp.cz
- Email: bfp.cz
- Email security: SPF (hard fail), no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 30,004,512, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted