SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ze-tec.de
SSL/TLS Certificate
SSL/TLS Certificate for ze-tec.de
Untrusted chain- Issued by (CA)
- Let's Encrypt
- Subject
- ze-tec.de
- Valid from
- Jun 12, 2026
- Valid until
- Sep 10, 2026 (47 days remaining)
- Public key
- EC 256-bit
- Serial
- 0623183FCEBD9D993F803E498F35DA0C8787
- SHA-256 fingerprint
- 77:E2:D3:E5:41:AA:08:F6:0C:AE:8A:90:48:23:C0:4B:D4:1E:26:1B:DC:86:60:E4:3A:42:1F:1C:61:E4:E3:13
- Chain
- YE2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ze-tec.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ze-tec.de continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
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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