What powers sferia.cz?
Last seen Oct 2026 · 22 technologies across 14 categories
Analytics
CMS
Databases
Font scripts
Hosting panels
JavaScript libraries
Miscellaneous
Programming languages
Security
Tag managers
UI frameworks
Web servers
Webmail
WordPress plugins
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 checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.52 / 10 · ranked #2,459,281 of all domains
11 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- Weight: 1.0 MB · 58 requests
- WordPress theme: betheme (child: betheme-child) · all themes
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- sferia.cz
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Amazon Web Services (3.120.81.58)
- DNS: sferia.cz
- Email: Google Workspace
- Email security: SPF (hard fail), DMARC reject
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 19,700,911, 5 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.sferia.cz | 16 |
| sferia.cz | 8 |
| cfc.sferia.cz | 6 |
Full technology history →
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Recent changes
- detected OpenResty Sep 2026
- dropped Font Awesome Mar 2026
- dropped Google Font API Mar 2026
- dropped GSAP Mar 2026
- dropped HTTP/3 Mar 2026
- dropped Joomla Mar 2026
- dropped jQuery Migrate Mar 2026
- dropped LazySizes Mar 2026
- dropped reCAPTCHA Mar 2026
- detected Complianz Feb 2026
- detected Google Tag Manager Feb 2026
- detected MySQL Feb 2026
- detected Plesk Feb 2026
- detected RankMath SEO Feb 2026
- detected WordPress Feb 2026
- detected WordPress Super Cache Feb 2026
- detected WPForms Feb 2026