undefined443.dev
undefined443.dev is a live Chinese-language website hosted on Cloudflare, Inc. (AS13335) in the United States. cl0q first saw it on 2026-07-30 and last crawled it on 2026-08-05. It resolves to 104.21.55.223 and has mail (MX) records set up. Its favicon is fingerprinted by SHA-256, so you can find every other site that serves the same icon.
How the site describes itself:
undefined443 - 博客园
undefined443
| Status | 200 OK — live & indexed by cl0q |
|---|---|
| First seen | 2026-07-30 |
| Last crawled | 2026-08-05 |
| IPv4 | 104.21.55.223 |
| IPv6 | 2606:4700:3031::ac43:adc7 |
| Network | AS13335 Cloudflare, Inc. · California |
| Mail (MX) | mx01.mail.icloud.com,mx02.mail.icloud.com |
| Language | zh-cn |