What powers 
nlk.cz?
Last seen Sep 2026 · 18 technologies across 14 categories
Analytics
Caching
CDN
CMS
Databases
Font scripts
Hosting
JavaScript libraries
Miscellaneous
Performance
Programming languages
UI frameworks
Web servers
WordPress themes
AI Crawlers
Blocks 9 of 33 AI crawlers we track by name in its robots.txt. Checked Oct 2026.
Training crawlers
- Applebot-Extended Blocked
- Bytespider Blocked
- CCBot Blocked
- ClaudeBot Blocked
- Google-Extended Blocked
- GPTBot Blocked
- meta-externalagent Blocked
Search and AI assistants
- Amazonbot Blocked
- PetalBot Blocked
The other 24 AI crawlers we track are not mentioned and stay allowed by default.
- robots.txt found
- llms.txt not found
- ai.txt not found
Content Signals:
search=yes ai-train=no declared in robots.txt
AI Crawlers
9 of 33 AI crawlers blocked
Standards: Content Signals
Audience
- 67% desktop
- 33% phone
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.67 / 10 · ranked #376,814 of all domains
82 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech
- Weight: 1.9 MB · 68 requests
- WordPress theme: franz-josef · all themes
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- National Medical Library
- Founded: 1992
- Country: Czech Republic
From Wikidata (CC0).
Infrastructure
- Hosted on CESNET2 (195.113.87.226)
- DNS: nlk.cz
- Email: nlk.cz
- Email security: SPF (hard fail), DMARC monitor only
- SSL: HARICA, RSA 2048, expires Feb 2027
- Common Crawl link graph: rank 614,604, 8 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| nlk.cz | 16 |
| muzeum.nlk.cz | 13 |
| casopis.nlk.cz | 11 |
| dev.nlk.cz | 1 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Twitter Emoji (Twemoji) Jan 2026