SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
koenig-datentechnik.de
SSL/TLS Certificate
SSL/TLS Certificate for koenig-datentechnik.de
Self-signed- Issued by (CA)
- mail.namast3.de
- Subject
- mail.namast3.de
- Valid from
- Jun 23, 2023
- Valid until
- Jun 20, 2033 (2455 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 30825184876134B32513C1163E128496FB32B79D
- SHA-256 fingerprint
- 16:71:C5:82:37:E8:52:A4:26:EE:5B:AF:03:F9:DA:BF:08:4A:71:7B:26:79:3C:22:74:2A:96:35:1A:74:D2:D7
- Chain
- mail.namast3.de
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 Sep 29, 2026.
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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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