SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
12340.one
SSL/TLS Certificate
SSL/TLS Certificate for 12340.one
Valid- Issued by (CA)
- Asseco Data Systems S.A.
- Subject
- 3400.cc
- Valid from
- Sep 18, 2025
- Valid until
- Sep 18, 2026 (57 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 6D9DFD956B1A5A71ADD648BDBFE054D2
- SHA-256 fingerprint
- 12:A7:89:92:D3:AE:27:05:47:3C:47:AE:AA:F8:32:36:FB:2D:BD:85:41:F7:85:D3:C2:60:EB:6A:F6:3E:C0:12
- Chain
- Certum DV TLS G2 R39 CA → Certum Trusted Root CA → Certum Trusted Network CA
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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Uptime
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DNS changes
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TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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