SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
die-aufbau-kur.info
SSL/TLS Certificate
SSL/TLS Certificate for die-aufbau-kur.info
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- aufbau-kur.de
- Valid from
- Oct 1, 2026
- Valid until
- Dec 30, 2026 (71 days remaining)
- Public key
- EC 256-bit
- Serial
- 059ACDA8F78D1B2D56D886D933F5B62678F2
- SHA-256 fingerprint
- 91:13:DE:22:45:56:53:FC:7B:56:11:AE:71:02:33:98:D7:9E:BC:EE:F1:DE:9A:E1:DE:28:64:5B:BE:79:06:07
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).
We've observed 1 previous certificate for this host. This certificate has been served since Oct 2, 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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