| Subdomain | First seen | Last seen | DNS | Certificate issuer | Report |
|---|
| www.jfrost.net | Apr 2021 | Aug 2026 | No DNS | ZeroSSL GmbH | Report → |
| m.jfrost.net | Jul 2025 | Jul 2026 | No DNS | ZeroSSL GmbH | Report → |
| wap.jfrost.net | Jul 2025 | Jul 2026 | No DNS | ZeroSSL GmbH | Report → |
| file.jfrost.net | May 2016 | May 2016 | No DNS |
Found in public certificate transparency logs, which record every publicly trusted certificate. Some subdomains may no longer exist.