cas.cz
Domduck has read cas.cz on 6 days across 5 sources, since 2 August 2026. The domain was registered in 1996. Its robots.txt blocks none of the 8 AI crawlers Domduck tracks.
Last checked .
Charts appear once there are seven days of readings.
blocked
What changed
6 days of readingsNothing has changed since the first reading on 2 August 2026.
Popularity rank
75 days, lower is betterPosition in the Tranco list, a research ranking of the million most popular domains averaged over thirty days so a single day’s traffic spike cannot move it.
AI crawler policy
Redirects to www.avcr.cz · No llms.txtNo ChatGPT browsing or training
No ChatGPT search surface
No Claude retrieval
No Perplexity citation
Out of Gemini and AI Overviews grounding, Search ranking unaffected
Out of Apple Intelligence training
Out of most open training corpora
Out of TikTok and Doubao
Read from cas.cz/robots.txt. “Not named” means the file says nothing about that agent, which is not the same as allowing it: a catch-all rule added later blocks it without anyone deciding to.
What the domain itself says
read directly, not from a vendor- Issuer
- Hellenic Academic and Research Institutions CA
- Valid
- Yes
- Expires
- 2027-02-06
- Protocol
- TLSv1.3
- Names covered
- 4
- A records
- 1
- AAAA records
- 0
- Mail exchangers
- 1
- Nameservers
- academy.cas.cz, nsa.ces.net, visla.utia.cas.cz
- DMARC policy
- none published
- Registered
- 1996-10-06
- Registrar
- —
- Registry status
- active
How cas.cz compares to other .cz domains
Questions
- Does cas.cz block GPTBot?
- No. cas.cz's robots.txt does not disallow GPTBot, though it does not name the agent either.
- Does cas.cz publish an llms.txt file?
- No. Domduck found no llms.txt at cas.cz.
- When was cas.cz registered?
- 6 October 1996.
- Who issues cas.cz's certificate?
- Hellenic Academic and Research Institutions CA.
How this page is made
Every number on this page is a measurement Domduck took itself or read from a public source, on a stated date. Nothing here is written by a language model. Where a value has not changed, no sentence is generated about it.
First reading . 5 sources, 6 days with at least one reading. The popularity rank comes from the Tranco list; the registration record from RDAP, which ICANN requires registries to publish. The certificate, the DNS records and the crawler policy are read by Domduck directly from cas.cz.