| Subdomain | First seen | Last seen | DNS | Certificate issuer | Report |
|---|
| gs.admin.fail | Dec 2021 | May 2022 | No DNS | Let's Encrypt | Report → |
| www.admin.fail | Jan 2019 | Feb 2019 | Resolves | Let's Encrypt | Report → |
| panel.admin.fail | Feb 2019 | Feb 2019 | No DNS | Let's Encrypt | Report → |
| b.admin.fail | Oct 2018 | Oct 2018 | No DNS |
Found in public certificate transparency logs, which record every publicly trusted certificate. Some subdomains may no longer exist.