quad9.net
Domduck has read quad9.net on 6 days across 5 sources, since 2 August 2026. The domain was registered in 2017. 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 readings- 29 September 2026 (2026-09-29)
- robots.txt started returning HTTP 304 between 15 September 2026 and 29 September 2026, from 200.
- 31 August 2026 (2026-08-31)
- Mail routing changed between 17 August 2026 and 31 August 2026, from mx1.quad9.net, mx2.quad9.net, mx4.quad9.net to mx4.quad9.net.
- 17 August 2026 (2026-08-17)
- The certificate was renewed between 3 August 2026 and 17 August 2026 and is valid to 4 November 2026.
Popularity rank
73 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
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 quad9.net/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
- Let's Encrypt
- Valid
- Yes
- Expires
- 2026-11-04
- Protocol
- TLSv1.3
- Names covered
- 1
- A records
- 1
- AAAA records
- 1
- Mail exchangers
- 1
- Nameservers
- anyns.pch.net, ns2.pch.net, ns3.pch.net
- DMARC policy
- quarantine
- Registered
- 2017-05-25
- Registrar
- Key-Systems GmbH
- Registry status
- client delete prohibited, client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
How quad9.net compares to other .net domains
Questions
- Does quad9.net block GPTBot?
- No. quad9.net's robots.txt does not disallow GPTBot, though it does not name the agent either.
- Does quad9.net publish an llms.txt file?
- No. Domduck found no llms.txt at quad9.net.
- When was quad9.net registered?
- 25 May 2017, through Key-Systems GmbH.
- Who issues quad9.net's certificate?
- Let's Encrypt.
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 quad9.net.