SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sgi-kuppenheim.de
SSL/TLS Certificate
SSL/TLS Certificate for sgi-kuppenheim.de
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- server121.serverconfig.center
- Valid from
- Jun 28, 2026
- Valid until
- Sep 26, 2026 (50 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05DB49A6EF85271A0EC94D59C9E14962ECCD
- SHA-256 fingerprint
- CF:EE:CB:1F:25:39:F3:B6:A7:4F:77:61:B6:6F:B7:1A:70:AF:B4:6A:D7:BC:C6:71:C2:59:36:32:3A:4F:85:A3
- 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, 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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