cwi.nl

Domduck has read cwi.nl on 7 days across 5 sources, since 2 August 2026. The domain was registered in 1986. Its robots.txt blocks none of the 8 AI crawlers Domduck tracks.

Last checked .

AI crawler policycwi.nl
0/8AI crawlers
blocked
Blocked 0.0%Allowed by name 0.0%Not named 100.0%
Read from this domain’s own robots.txt, parsed to RFC 9309.
Popularity rank#4,278Tranco
Age40ySURF B.V.
Certificate117dHellenic Academic and Research Institutions CA
AI crawlers0/8none blocked
Record7dsince 2026-08-02

What changed

7 days of readings

Nothing has changed since the first reading on 2 August 2026.

Popularity rank

73 days, lower is better
cwi.nl popularity rank#4,278 today
2026-08-024,278 – 4,2782026-10-13
The axis is flipped, so a rise on this chart is a rise in the list.

Position 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.cwi.nl · No llms.txt
Blocked 0.0%Allowed by name 0.0%Not named 100.0%
GPTBotOpenAI
Not named

No ChatGPT browsing or training

OAI-SearchBotOpenAI
Not named

No ChatGPT search surface

ClaudeBotAnthropic
Not named

No Claude retrieval

PerplexityBotPerplexity
Not named

No Perplexity citation

Google-ExtendedGoogle
Not named

Out of Gemini and AI Overviews grounding, Search ranking unaffected

Applebot-ExtendedApple
Not named

Out of Apple Intelligence training

CCBotCommon Crawl
Not named

Out of most open training corpora

BytespiderByteDance
Not named

Out of TikTok and Doubao

Read from cwi.nl/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
Certificate117d left
Issuer
Hellenic Academic and Research Institutions CA
Valid
Yes
Expires
2027-02-07
Protocol
TLSv1.3
Names covered
2
DNSDNSSEC validated
A records
1
AAAA records
0
Mail exchangers
1
Nameservers
dwalin.nikhef.nl, ns1.cwi.nl, ns1.zurich.surf.net, ns2.cwi.nl
DMARC policy
quarantine
Registration40 years old
Registered
1986-04-30
Registrar
SURF B.V.
Registry status
active

How cwi.nl compares to other .nl domains

This domaincwi.nl
0of 8 crawlers blocked
Median .nl57 domains
0of 8 crawlers blocked

Questions

Does cwi.nl block GPTBot?
No. cwi.nl's robots.txt does not disallow GPTBot, though it does not name the agent either.
Does cwi.nl publish an llms.txt file?
No. Domduck found no llms.txt at cwi.nl.
When was cwi.nl registered?
30 April 1986, through SURF B.V..
Who issues cwi.nl'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.

What the collectors have read · Request removal

First reading . 5 sources, 7 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 cwi.nl.