What powers kostnidren.cz?
Last seen Aug 2026 · 31 technologies across 17 categories
Analytics
CMS
Databases
Font scripts
JavaScript libraries
Miscellaneous
Operating systems
Performance
Programming languages
Security
SEO
Tag managers
UI frameworks
Video players
Web frameworks
Web servers
WordPress plugins
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
- Sep 2026 * removed from robots.txt
- Aug 2026 robots.txt removed
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 73% phone
- 27% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.31 / 10 · ranked #196,552 of all domains
154 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 1.5 MB · 49 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Český národní registr dárců dřeně, o.p.s (Český národní registr dárců dřeně, o.p.s. on Wikidata)
- Founded: 1992
- Country: Czech Republic
- Profiles: Facebook, Instagram, YouTube
From the homepage's own structured data (Sep 2026) and Wikidata (CC0).
Infrastructure
- Hosted on CDT-AS The Czech Republic (212.11.104.13)
- DNS: softech.cz
- Email: Active 24
- Email security: SPF (hard fail), no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, RSA 4096, expires Nov 2026
- Common Crawl link graph: rank 3,004,695, 6 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| registr.kostnidren.cz | 21 |
| kostnidren.cz | 11 |
| www.kostnidren.cz | 11 |
| nadace.kostnidren.cz | 9 |
Full technology history →
Report an incorrect detection
Recent changes
- detected HTTP/3 May 2026
- detected LazySizes May 2026
- detected core-js Apr 2026
- detected Google Call Conversion Tracking Apr 2026
- dropped LazySizes Mar 2026
- detected Google Tag Manager Feb 2026