Found in public certificate transparency logs, which record every publicly trusted certificate. Some subdomains may no longer exist.
| Let's Encrypt |
| Report → |
| www.sitemaps.tdd.dev | Apr 2024 | May 2025 | No DNS | Let's Encrypt | Report → |
| www.www.sitemap.tdd.dev | May 2025 | May 2025 | No DNS | Let's Encrypt | Report → |
| m.tdd.dev | May 2025 | May 2025 | No DNS | Let's Encrypt | Report → |
| ww12.tdd.dev | May 2025 | May 2025 | No DNS | Let's Encrypt | Report → |