What powers 
zacler.cz?
Last seen Aug 2026 · 11 technologies across 7 categories
Microsoft 365
since Aug 2022
SparkPost
since Aug 2022
Font scripts
Google Font API
since Feb 2019
JavaScript libraries
Programming languages
PHP
since Feb 2019
UI frameworks
Web frameworks
Nette Framework
since Feb 2019
Web servers
Apache HTTP Server
since Feb 2019
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
- 84% phone
- 17% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.93 / 10 · ranked #628,465 of all domains
57 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.4 s |
| INP | 275 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 6.5 MB · 97 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Žacléř
- Country: Czech Republic
From Wikidata (CC0).
Infrastructure
- Hosted on IP4ISP (176.62.225.50, IPv6)
- DNS: wedos.com
- Email: Microsoft 365
- Email security: SPF (hard fail), no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, RSA 4096, expires Nov 2026
- Common Crawl link graph: rank 1,230,460, 5 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted