SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for zmag.de
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- healthpolicy-online.de
- Valid from
- Jun 3, 2026
- Valid until
- Sep 1, 2026 (22 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06624EAF8A0C132FFA9B3BC983E98E392B26
- SHA-256 fingerprint
- 9A:32:66:6A:72:1B:31:B5:51:C6:61:6E:47:28:DC:55:1B:60:1F:35:BA:95:58:F4:D2:77:4A:3B:7F:E4:50:C7
- 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.
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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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