What powers zsjesenice.cz?
Last seen Sep 2026 · 11 technologies across 7 categories
JavaScript frameworks
JavaScript libraries
Miscellaneous
HTTP/3
since Dec 2024
Open Graph
since Sep 2022
Programming languages
PHP
since Jan 2019
Security
HSTS
since Sep 2022
Web frameworks
Webmail
Apple iCloud Mail
since Jan 2023
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 68% phone
- 32% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.91 / 10 · ranked #3,834,192 of all domains
7 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1 s |
| INP | 75 ms |
| CLS | 0 |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- Weight: 12.4 MB · 68 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Hetzner (213.239.220.187, IPv6)
- DNS: web4u.cz
- Email: zsjesenice.cz
- Email security: SPF (hard fail), DMARC reject, DNSSEC signed
- SSL: Let's Encrypt, ECDSA P256, expires Nov 2026
- Common Crawl link graph: rank 33,323,516, 3 hosts
- Verified with: Apple Business, Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped Bootstrap Aug 2026
- dropped cdnjs Aug 2026
- dropped Cloudflare Aug 2026
- dropped Google Analytics Aug 2026
- dropped Google Tag Manager Aug 2026
- dropped Handlebars Aug 2026
- dropped jQuery CDN Aug 2026
- dropped Microsoft Word Aug 2026
- dropped OWL Carousel Aug 2026
- dropped PDF.js Aug 2026
- dropped Popper Aug 2026
- detected core-js Jul 2026
- detected Lightbox Jul 2026
- detected Swiper Jul 2026
- detected Vue.js Jul 2026
- dropped YouTube Apr 2026
- detected YouTube Feb 2026