SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
hatz-architektur.de
SSL/TLS Certificate
SSL/TLS Certificate for hatz-architektur.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- hatz-architektur.de
- Valid from
- Sep 1, 2026
- Valid until
- Nov 30, 2026 (25 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05FC2809E7D96CC2086AC6162286C554D077
- SHA-256 fingerprint
- 30:5F:E8:29:37:2B:66:85:3D:21:53:6E:40:9A:7D:DC:A4:15:FE:15:C2:02:76:F9:93:41:27:AE:33:A5:54:51
- Chain
- YR1 → Root YR → ISRG Root X1
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, CNAME, TXT 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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