What powers optika-simunkova.cz?
Last seen Sep 2026 · 7 technologies across 7 categories
Analytics
Google Analytics
since Jun 2020
CDN
jsDelivr
since Mar 2023
JavaScript libraries
Lightbox
since Mar 2023
Programming languages
Python
since Mar 2023
Security
HSTS
since Sep 2022
UI frameworks
Web servers
gunicorn
since Oct 2025
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 checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
- 100% phone
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.62 / 10 · ranked #5,552,997 of all domains
6 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| CLS | 0 |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- Weight: 5.7 MB · 46 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on INTERNET-CZ Ktis 2, 384 03 Ktis (81.2.235.36)
- DNS: savana.cz
- Email: savana.cz
- Email security: no SPF record, no DMARC record
- SSL: Certum, RSA 2048, expires Oct 2026
- Common Crawl link graph: rank 25,752,044
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
- detected Google Analytics Dec 2025
- dropped Apache HTTP Server Nov 2025
- dropped CentOS Nov 2025
- dropped mod_wsgi Nov 2025
- dropped OpenSSL Nov 2025
- dropped PHP Nov 2025