What powers yubikey.cz?
Last seen Sep 2026 · 10 technologies across 9 categories
CDN
jQuery CDN
since Feb 2022
Ecommerce
Cart Functionality
since Feb 2022
Font scripts
Google Font API
since Jan 2021
JavaScript libraries
OWL Carousel
since Jan 2021
Miscellaneous
HTTP/3
since Apr 2026
Programming languages
PHP
since Jan 2021
UI frameworks
Web frameworks
Nette Framework
since Jan 2021
Webmail
Microsoft 365
since Aug 2022
AI Crawlers
robots.txt could not be read at the last check (Sep 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not checked
- ai.txt not checked
AI Crawlers
Policy unknown
Audience
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.72 / 10 · ranked #2,129,515 of all domains
9 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech
- Weight: 0.9 MB · 32 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on INTERNET-CZ Ktis 2, 384 03 Ktis (81.2.194.241)
- DNS: forpsi.cz
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC quarantine
- Common Crawl link graph: rank 12,229,028, 2 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped Apache HTTP Server May 2026
- detected HTTP/3 Apr 2026