SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
tesna-online.de
SSL/TLS Certificate
SSL/TLS Certificate for tesna-online.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- tesna-online.de
- Valid from
- Jun 16, 2026
- Valid until
- Sep 14, 2026 (48 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05DA5B9AE7978D0DC0C354A10E49412C805E
- SHA-256 fingerprint
- 8C:3A:14:34:4E:B1:BA:E9:81:7A:73:96:49:27:DE:05:FE:AD:2F:30:FF:03:F1:16:0C:E5:1A:FC:8B:07:95:89
- Chain
- YR2 → Root YR → ISRG Root X1
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 Jul 26, 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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