SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for h-s-m.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- h-s-m.de
- Valid from
- Aug 6, 2026
- Valid until
- Nov 4, 2026 (43 days remaining)
- Public key
- EC 256-bit
- Serial
- 0550DF6627B433C9ABDDB7847517FD82B480
- SHA-256 fingerprint
- 8F:55:2D:5C:C6:0E:05:91:AA:26:9E:26:8E:A6:1D:AE:7F:C0:3E:B9:C5:91:C9:BD:78:83:FB:78:75:D2:CA:76
- Chain
- YE1 → Root YE → ISRG Root X2
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
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
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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