What powers jcus.cz?
Last seen Sep 2026 · 20 technologies across 10 categories
CMS
Databases
MySQL
since Sep 2021
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
RSS
since Dec 2022
Performance
Priority Hints
since Oct 2023
Programming languages
PHP
since Sep 2021
Security
Really Simple SSL & Security
since Apr 2024
reCAPTCHA
since Sep 2021
Web servers
Apache HTTP Server
since Sep 2021
Webmail
Microsoft 365
since Aug 2022
WordPress plugins
Contact Form 7
since Feb 2022
Cookie Notice
since Jan 2025
Ivory Search
since Feb 2023
TablePress
since Feb 2022
Translate WordPress
since Feb 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
- 87% phone
- 13% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.82 / 10 · ranked #1,933,922 of all domains
12 referring domains · OpenPageRank
Core Web Vitals
| LCP | 4.9 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 4100 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech
- Weight: 3.2 MB · 56 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on INTERNET-CZ Ktis 2, 384 03 Ktis (185.129.138.60)
- DNS: forpsi.cz
- Email: no MX record returned, SPF names Microsoft 365
- Email security: SPF (hard fail), DMARC monitor only, DNSSEC signed
- Common Crawl link graph: rank 16,334,408
DNS records as swept Sep 2026. How the web is hosted