What powers nv-optics.cz?
Last seen Oct 2026 · 11 technologies across 9 categories
Analytics
Google Analytics
since Oct 2019
Ecommerce
Cart Functionality
since Aug 2020
Font scripts
Font Awesome
since Oct 2019
Google Font API
since Oct 2019
JavaScript libraries
Live chat
Operating systems
Debian
since Oct 2019
Programming languages
PHP
since Feb 2019
UI frameworks
Web servers
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 Oct 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
- 72% phone
- 28% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.66 / 10 · ranked #5,266,834 of all domains
7 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.8 s |
| INP | 50 ms |
| CLS | 0 |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: Czech
- Weight: 1.6 MB · 62 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Hetzner (136.243.31.77)
- DNS: relaxhosting.cz
- Email: relaxhosting.cz
- Email security: SPF (hard fail), DMARC quarantine
- SSL: Let's Encrypt, RSA 4096, expires Dec 2026
- Common Crawl link graph: rank 10,880,181
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted