Found in public certificate transparency logs, which record every publicly trusted certificate. Some subdomains may no longer exist.
| Let's Encrypt |
| Report → |
| dev.20promises.net | Jul 2025 | Jul 2025 | No DNS | Let's Encrypt | Report → |
| members.20promises.net | Jul 2025 | Jul 2025 | No DNS | Let's Encrypt | Report → |
| test.20promises.net | Jul 2025 | Jul 2025 | No DNS | Let's Encrypt | Report → |
| www.20promises.net | Jul 2024 | Jul 2025 | No DNS | Let's Encrypt | Report → |