SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
secit-heise.de
SSL/TLS Certificate
SSL/TLS Certificate for secit-heise.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- secit-heise.de
- Valid from
- Sep 1, 2026
- Valid until
- Nov 30, 2026 (88 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 064FC83733C33F7C59BB8015F07D9B0F340F
- SHA-256 fingerprint
- 00:64:72:A8:26:45:F4:F2:45:39:C3:2C:F3:F2:56:75:70:36:3B:DF:20:37:14:CC:A0:5D:69:66:9D:23:9F:28
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by secit-heise.de's certificate expiring
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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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