What powers 
dejepis21.cz?
Last seen Sep 2026 · 34 technologies across 20 categories
A/B Testing
Analytics
Google Analytics
since Apr 2019
CDN
CMS
Comment systems
Livefyre
since Oct 2022
Databases
MySQL
since Nov 2022
Font scripts
JavaScript libraries
Maps
Google Maps
since Apr 2019
Leaflet
since Oct 2022
Miscellaneous
Operating systems
CentOS
since Apr 2019
Programming languages
PHP
since Apr 2019
Security
Cloudflare Bot Management
since Feb 2023
Tag managers
Google Tag Manager
since Apr 2019
UI frameworks
Video players
Web frameworks
Nette Framework
since Apr 2019
Web server extensions
Web servers
Apache HTTP Server
since Apr 2019
Webmail
Google Workspace
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
Open Page Rank
3.89 / 10 · ranked #661,555 of all domains
48 referring domains · OpenPageRank
Page
- Weight: 0.9 MB · 46 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on QUANTCOM-AS Quantcom a.s. (212.24.154.103)
- DNS: webcloud.cz
- Email: Google Workspace
- Email security: no SPF record, no DMARC record, MTA-STS, BIMI
- SSL: Let's Encrypt, RSA 4096, expires Dec 2026
- Common Crawl link graph: rank 787,390, 15 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| zdroje.dejepis21.cz | 16 |
| dejepis21.cz | 12 |
| obetiokupace.dejepis21.cz | 11 |
| www.dejepis21.cz | 11 |
| normalizace.dejepis21.cz | 9 |
| obrazyvalky.dejepis21.cz | 9 |
| letniskola.dejepis21.cz | 8 |
Full technology history →
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Recent changes
- detected Twitter Emoji (Twemoji) Dec 2025