congress.gov
Domduck has read congress.gov on 6 days across 5 sources, since 2 August 2026. The domain was registered in 1997. Its robots.txt blocks 7 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 200 between 15 September 2026 and 29 September 2026, from 304.
- The certificate was renewed between 15 September 2026 and 29 September 2026 and is valid to 15 December 2026.
- 15 September 2026 (2026-09-15)
- robots.txt started returning HTTP 304 between 31 August 2026 and 15 September 2026, from 200.
- 31 August 2026 (2026-08-31)
- Mail routing changed between 17 August 2026 and 31 August 2026, from mx22.loc.gov, mx23.loc.gov, mx41.loc.gov, mx42.loc.gov to mx22.loc.gov, mx41.loc.gov, mx42.loc.gov.
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
Redirects to www.congress.gov · 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 congress.gov/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
- 2026-12-15
- Protocol
- TLSv1.3
- Names covered
- 2
- A records
- 2
- AAAA records
- 2
- Mail exchangers
- 3
- Nameservers
- alice.ns.cloudflare.com, kevin.ns.cloudflare.com
- DMARC policy
- reject
- Registered
- 1997-10-02
- Registrar
- get.gov
- Registry status
- server transfer prohibited
How congress.gov compares to other .gov domains
Questions
- Does congress.gov block GPTBot?
- Yes. congress.gov's robots.txt disallows GPTBot by name.
- Does congress.gov publish an llms.txt file?
- No. Domduck found no llms.txt at congress.gov.
- When was congress.gov registered?
- 2 October 1997, through get.gov.
- Who issues congress.gov'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 congress.gov.