What powers virtualnijazykovka.cz?
Last seen Oct 2026 · 23 technologies across 14 categories
Advertising
Analytics
CDN
CMS
Cookie compliance
Font scripts
JavaScript libraries
Miscellaneous
Performance
Programming languages
Security
Tag managers
UI frameworks
Web frameworks
AI Crawlers
Blocks 8 of 33 AI crawlers we track by name in its robots.txt. Checked Oct 2026. A recent check saw a policy file missing; awaiting confirmation.
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
The other 25 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
8 of 33 AI crawlers blocked
Standards: Content Signals
Audience
- 54% desktop
- 46% phone
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.48 / 10 · ranked #6,694,796 of all domains
4 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- CDN: Cloudflare
- Weight: 3.0 MB · 62 requests
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Cloudflare (104.21.51.118, IPv6)
- Email: Google Workspace
- Email security: no SPF record, DMARC monitor only
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 16,198,273
- Verified with: Brevo, Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Priority Hints Oct 2026
- dropped gunicorn Mar 2026
- detected Cloudflare Browser Insights Feb 2026
- dropped jQuery Feb 2026
- dropped jQuery CDN Feb 2026
- dropped Apache HTTP Server Jan 2026
- dropped Elementor Jan 2026
- dropped GeneratePress Jan 2026
- dropped jQuery Migrate Jan 2026
- dropped jQuery UI Jan 2026
- dropped MySQL Jan 2026
- dropped PHP Jan 2026
- dropped Priority Hints Jan 2026
- dropped RSS Jan 2026
- dropped Swiper Jan 2026
- dropped WooCommerce Jan 2026
- dropped WordPress Jan 2026
- dropped Yoast SEO Jan 2026
- detected Bootstrap Dec 2025
- detected cdnjs Dec 2025
- detected Django Dec 2025
- detected Font Awesome Dec 2025
- detected gunicorn Dec 2025
- detected HSTS Dec 2025
- detected HTTP/3 Dec 2025
- detected jQuery CDN Dec 2025
- detected jsDelivr Dec 2025
- detected Microsoft Clarity Dec 2025
- detected PWA Dec 2025
- detected Python Dec 2025
- detected reCAPTCHA Dec 2025
- detected Wagtail Dec 2025