What powers klubcentrum.cz?
Last seen Aug 2026 · 12 technologies across 10 categories
Analytics
Google Analytics
since Feb 2019
Caching
WordPress Super Cache
since Jan 2019
CMS
WordPress
since Jan 2019
Cookie compliance
Databases
MySQL
since Jan 2019
Font scripts
Google Font API
since Jan 2019
Twitter Emoji (Twemoji)
since Feb 2022
JavaScript libraries
Programming languages
PHP
since Jan 2019
Security
HSTS
since Sep 2024
Really Simple SSL & Security
since Apr 2024
Web servers
Nginx
since Mar 2023
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 found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 92% phone
- 8% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.19 / 10 · ranked #1,285,776 of all domains
30 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 2000 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech
- Weight: 1.3 MB · 31 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on RESAL-AS (91.227.7.76)
- DNS: web4u.cz
- Email: serverbox.cz
- Email security: no SPF record, no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 9,436,445, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected Twitter Emoji (Twemoji) Feb 2026