What powers 
rockopera.cz?
Last seen Sep 2026 · 18 technologies across 12 categories
Analytics
CDN
CMS
Font scripts
JavaScript libraries
Live chat
Miscellaneous
Performance
Programming languages
Security
Tag managers
Web servers
AI Crawlers
Blocks 13 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
- cohere-training-data-crawler Blocked
- Diffbot Blocked
- Google-CloudVertexBot Blocked
- Google-Extended Blocked
- GoogleOther Blocked
- GPTBot Blocked
- meta-externalagent Blocked
Search and AI assistants
- Amazonbot Blocked
- PetalBot Blocked
The other 20 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
Content Signals:
search=yes ai-train=no declared in robots.txt
- Sep 2026 claude-web added to robots.txt
- Sep 2026 petalbot added to robots.txt
- Sep 2026 googleother added to robots.txt
- Sep 2026 diffbot added to robots.txt
- Sep 2026 cohere-ai added to robots.txt
- Sep 2026 google-cloudvertexbot added to robots.txt
AI Crawlers
13 of 33 AI crawlers blocked
Standards: Content Signals
Audience
- 72% phone
- 26% desktop
- 2% tablet
Czechia
Türkiye
Argentina
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.95 / 10 · ranked #611,165 of all domains
52 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.8 s |
| INP | 150 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 6.4 MB · 242 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Cloudflare (104.21.55.132, IPv6)
- DNS: Cloudflare DNS
- Email: webnode.com
- Email security: SPF (hard fail), DMARC monitor only
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 10,087,943, 2 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.rockopera.cz | 13 |
| shop.rockopera.cz | 9 |
| rockopera.cz | 4 |
Full technology history →
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Recent changes
- dropped OpenResty Dec 2025