What powers 
planetko.cz?
Last seen Oct 2026 · 12 technologies across 7 categories
Analytics
Google Analytics
since Oct 2023
Font scripts
Google Font API
since Oct 2023
Typekit
since Oct 2023
JavaScript libraries
Miscellaneous
HTTP/3
since Oct 2023
Open Graph
since Oct 2023
Security
HSTS
since Oct 2023
Video players
YouTube
since Oct 2023
Web servers
Nginx
since Oct 2023
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 87% phone
- 13% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.44 / 10 · ranked #960,623 of all domains
29 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.5 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 100 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: Czech
- Weight: 1.2 MB · 72 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Vysoká škola báňská - Technická univerzita Ostrava (Ostrava planetarium on Wikidata)
- Founded: 1980
- Industry: Professional services (declares
ProfessionalService) - Country: Czech Republic
From the homepage's own structured data (Oct 2026) and Wikidata (CC0).
Infrastructure
- Hosted on GIGASERVER Seonet Multimedia s.r.o. (185.66.36.4, IPv6)
- DNS: websupport.cz
- Email: no MX record returned
- Email security: DNSSEC signed
- SSL: Let's Encrypt, ECDSA P256, expires Jan 2027
- Common Crawl link graph: rank 11,991,364, 3 hosts
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted