| Subdomain | First seen | Last seen | DNS | Certificate issuer | Report |
|---|
| autodiscover.54321yesyoucan.com | Apr 2022 | Mar 2023 | No DNS | Let's Encrypt | Report → |
| cpanel.54321yesyoucan.com | Apr 2022 | Mar 2023 | No DNS | Let's Encrypt | Report → |
| cpcalendars.54321yesyoucan.com | Apr 2022 | Mar 2023 | No DNS | Let's Encrypt | Report → |
| cpcontacts.54321yesyoucan.com | Apr 2022 |
Found in public certificate transparency logs, which record every publicly trusted certificate. Some subdomains may no longer exist.