SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
thorsten-gerber.com
SSL/TLS Certificate
SSL/TLS Certificate for thorsten-gerber.com
Untrusted chain- Issued by (CA)
- Sectigo Limited
- Subject
- thorsten-gerber.com
- Valid from
- Mar 9, 2026
- Valid until
- Apr 6, 2027 (191 days remaining)
- Public key
- RSA 2048-bit
- Serial
- A249569B45D38AA51BC3F24FAD1AE948
- SHA-256 fingerprint
- 46:3A:7B:A5:E0:9D:42:38:B1:1F:18:DB:E9:F8:3E:A9:89:7F:A1:EF:24:9A:6A:48:0A:BA:E7:ED:27:F4:6A:D0
- Chain
- —
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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