What powers sfera.sk?
Last seen Aug 2026 · 31 technologies across 14 categories
Analytics
CDN
Cookie compliance
JavaScript frameworks
JavaScript libraries
Maps
Marketing automation
Miscellaneous
Programming languages
Security
Tag managers
UI frameworks
Video players
Webmail
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
Slovakia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.26 / 10 · ranked #1,177,980 of all domains
35 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 3.5 MB · 44 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Sféra (Slovakia)
- Founded: 1988
- Country: Slovakia
From Wikidata (CC0).
Infrastructure
- Hosted on Cloudflare (104.21.61.130, IPv6)
- Email: Microsoft 365
- Email security: no SPF record, no DMARC record, DNSSEC signed, CAA
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 2,652,994, 13 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| seminare.sfera.sk | 25 |
| www.sfera.sk | 22 |
| odpadove-teplo-mapa.sfera.sk | 5 |
Full technology history →
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Recent changes
- detected Microsoft 365 Jun 2026
- dropped Cart Functionality Nov 2025
- detected Cloudflare Browser Insights Nov 2025
- dropped Google AdSense Nov 2025
- dropped Google Hosted Libraries Nov 2025
- dropped RSS Nov 2025
- dropped SWFObject Nov 2025