SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dukon.com
SSL/TLS Certificate
SSL/TLS Certificate for dukon.com
Untrusted chain- Issued by (CA)
- internal-DC-01-CA
- Subject
- mail.dukon.com
- Valid from
- Dec 23, 2024
- Valid until
- Dec 23, 2026 (110 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 2C00000029BEEA42B7D22B4B63000200000029
- SHA-256 fingerprint
- FB:1B:B3:B9:C7:60:C3:F7:EC:1C:77:92:DA:13:A1:AD:27:F6:A8:4D:6B:26:DE:27:E5:3C:92:39:FB:B3:97:34
- Chain
- —
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Aug 18, 2026.
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DNS changes
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TLS certificate
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