| Subdomain | First seen | Last seen | DNS | Certificate issuer | Report |
|---|
| www.dcskill.com | May 2021 | Dec 2025 | Resolves | TrustAsia Technologies, Inc. | Report → |
| api.dcskill.com | Mar 2025 | Mar 2025 | Resolves | Let's Encrypt | Report → |
| bj.dcskill.com | Feb 2025 | Feb 2025 | Resolves | TrustAsia Technologies, Inc. | Report → |
| web.dcskill.com | Mar 2024 | Mar 2024 | No DNS |
Found in public certificate transparency logs, which record every publicly trusted certificate. Some subdomains may no longer exist.