letsencrypt.org
Domduck has read letsencrypt.org on 7 days across 5 sources, since 2 August 2026. The domain was registered in 2014. Its robots.txt blocks none of the 8 AI crawlers Domduck tracks.
Last checked .
blocked
What changed
7 days of readings- 29 September 2026 (2026-09-29)
- robots.txt started returning HTTP 200 between 15 September 2026 and 29 September 2026, from 304.
- 15 September 2026 (2026-09-15)
- robots.txt started returning HTTP 304 between 31 August 2026 and 15 September 2026, from 200.
- 14 September 2026 (2026-09-14)
- The certificate was renewed between 31 August 2026 and 14 September 2026 and is valid to 3 December 2026.
- 31 August 2026 (2026-08-31)
- robots.txt started returning HTTP 200 between 17 August 2026 and 31 August 2026, from 304.
- 17 August 2026 (2026-08-17)
- robots.txt started returning HTTP 304 between 3 August 2026 and 17 August 2026, from 200.
Popularity rank
72 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 letsencrypt.org/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
- 2026-12-03
- Protocol
- TLSv1.3
- Names covered
- 10
- A records
- 2
- AAAA records
- 2
- Mail exchangers
- 5
- Nameservers
- owen.ns.cloudflare.com, vera.ns.cloudflare.com
- DMARC policy
- reject
- Registered
- 2014-07-07
- Registrar
- Cloudflare, Inc.
- Registry status
- client delete prohibited, client transfer prohibited, client update prohibited
How letsencrypt.org compares to other .org domains
Questions
- Does letsencrypt.org block GPTBot?
- No. letsencrypt.org's robots.txt does not disallow GPTBot, though it does not name the agent either.
- Does letsencrypt.org publish an llms.txt file?
- No. Domduck found no llms.txt at letsencrypt.org.
- When was letsencrypt.org registered?
- 7 July 2014, through Cloudflare, Inc..
- Who issues letsencrypt.org'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, 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 letsencrypt.org.