SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

gerst-its.com

SSL/TLS Certificate

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SSL/TLS Certificate for gerst-its.com

Valid
Issued by (CA)
Let's Encrypt
Subject
gerst-its.com
Valid from
Aug 14, 2026
Valid until
Nov 12, 2026 (59 days remaining)
Public key
RSA 4096-bit
Serial
0597FD5DE6609DA51020396EB90F5546EE3C
SHA-256 fingerprint
DC:A7:4E:B1:49:34:5B:79:A2:35:CB:D0:85:35:5E:54:DF:D8:BD:9D:DB:34:74:BC:D2:88:BB:A8:0E:2F:75:FC
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (6)
gerst-it.de, gerst-its.com, gerst-its.de, www.gerst-it.de, www.gerst-its.com, www.gerst-its.de

Certificate Authority Authorization (CAA)

The serving CA (Let's Encrypt) is not among the authorities this domain's CAA records authorize (sectigo.com). This can indicate a misconfiguration or an unexpected issuance.

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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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