What powers builder.cz?
Last seen Jun 2025 · 9 technologies across 9 categories
Advertising
Google AdSense
since May 2022
Analytics
Google Analytics
since Jan 2019
JavaScript libraries
Miscellaneous
RSS
since Dec 2022
Operating systems
Debian
since Jan 2019
Programming languages
Security
reCAPTCHA
since May 2022
Web servers
Apache HTTP Server
since Jan 2019
Widgets
AddThis
since Jan 2019
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Sep 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Open Page Rank
3.92 / 10 · ranked #634,105 of all domains
38 referring domains · OpenPageRank
Infrastructure
- Hosted on WEB4U (81.91.84.189)
- DNS: web4u.cz
- Email: builder.cz
- Email security: no SPF record, no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, RSA 4096, expires Nov 2026
- Common Crawl link graph: rank 1,948,970, 3 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted