signal.org
Domduck has read signal.org on 6 days across 5 sources, since 2 August 2026. The domain was registered in 2001. 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- 15 September 2026 (2026-09-15)
- The certificate was renewed between 31 August 2026 and 15 September 2026 and is valid to 3 December 2026.
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 robots.txt served · 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 signal.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
- Google Trust Services
- Valid
- Yes
- Expires
- 2026-12-03
- Protocol
- TLSv1.3
- Names covered
- 1
- A records
- 2
- AAAA records
- 2
- Mail exchangers
- 5
- Nameservers
- casey.ns.cloudflare.com, zita.ns.cloudflare.com
- DMARC policy
- quarantine
- Registered
- 2001-04-15
- Registrar
- MarkMonitor Inc.
- Registry status
- client delete prohibited, server delete prohibited, client transfer prohibited, server transfer prohibited, client update prohibited, server update prohibited
How signal.org compares to other .org domains
Questions
- Does signal.org block GPTBot?
- No. signal.org's robots.txt does not disallow GPTBot, though it does not name the agent either.
- Does signal.org publish an llms.txt file?
- No. Domduck found no llms.txt at signal.org.
- When was signal.org registered?
- 15 April 2001, through MarkMonitor Inc..
- Who issues signal.org's certificate?
- Google Trust Services.
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 signal.org.