21cn.com
Domduck has read 21cn.com on 6 days across 5 sources, since 2 August 2026. The domain was registered in 1999. 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- 17 August 2026 (2026-08-17)
- robots.txt started returning HTTP 304 between 3 August 2026 and 17 August 2026, from 200.
Popularity rank
74 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 dlife.cn · 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 21cn.com/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
- WoTrus CA Limited
- Valid
- Yes
- Expires
- 2026-11-27
- Protocol
- TLSv1.3
- Names covered
- 2
- A records
- 1
- AAAA records
- 1
- Mail exchangers
- 1
- Nameservers
- vip3.alidns.com, vip4.alidns.com
- DMARC policy
- none published
- Registered
- 1999-02-08
- Registrar
- Xiamen 35.com Information Co., Ltd.
- Registry status
- client transfer prohibited
How 21cn.com compares to other .com domains
Questions
- Does 21cn.com block GPTBot?
- No. 21cn.com's robots.txt does not disallow GPTBot, though it does not name the agent either.
- Does 21cn.com publish an llms.txt file?
- No. Domduck found no llms.txt at 21cn.com.
- When was 21cn.com registered?
- 8 February 1999, through Xiamen 35.com Information Co., Ltd..
- Who issues 21cn.com's certificate?
- WoTrus CA Limited.
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 21cn.com.