SSL/TLS Certificate Lookup

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

gerst-it.com

SSL/TLS Certificate

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SSL/TLS Certificate for gerst-it.com

Valid
Issued by (CA)
Let's Encrypt
Subject
gerst-it.com
Valid from
Aug 14, 2026
Valid until
Nov 12, 2026 (66 days remaining)
Public key
RSA 4096-bit
Serial
068FA8AF9C8CAFE8F677C6C5D4DCCAE241DE
SHA-256 fingerprint
BB:D3:C6:B6:4F:90:61:64:CE:BA:A1:93:C8:14:1C:81:BD:60:0A:3F:6F:4D:E5:32:0B:AE:61:BA:93:11:6A:1B
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
gerst-it.com, www.gerst-it.com

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

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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