What powers 
gis4u.cz?
Last seen Jul 2026 · 3 technologies across 3 categories
Programming languages
PHP
since Oct 2022
Security
HSTS
since Sep 2024
Web servers
Nginx
since Oct 2022
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
5.51 / 10 · ranked #157,638 of all domains
113 referring domains · OpenPageRank
Infrastructure
- Hosted on COOLHOUSING-AS Vinohradska 190 (89.187.129.10, IPv6)
- DNS: fxdc.cz
- Email: tmapy.cz
- Email security: no SPF record, no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, wildcard, expires Nov 2026
- Common Crawl link graph: rank 9,997,224, 265 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| bolatice.gis4u.cz | 3 |
| dankovice.gis4u.cz | 3 |
| dobrovice.gis4u.cz | 3 |
| dub-nad-moravou.gis4u.cz | 3 |
| demo.gis4u.cz | 2 |