SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dr-zach.at
SSL/TLS Certificate
SSL/TLS Certificate for dr-zach.at
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- dr-zach.at
- Valid from
- Oct 31, 2026
- Valid until
- Jan 29, 2027 (79 days remaining)
- Public key
- EC 256-bit
- Serial
- 05434A350846C00EBF962CFC1DBF25A6CA8B
- SHA-256 fingerprint
- 03:2E:74:7F:E4:5E:EE:ED:FB:02:D6:40:A4:F6:93:EC:E9:13:EB:14:1B:35:E4:99:80:27:66:5E:60:A5:39:81
- Chain
- YE2 → Root YE → ISRG Root X2 → 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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This is today's certificate. Turn on monitoring and we'll watch dr-zach.at continuously, notifying you the moment anything moves across all three signals:
Uptime
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DNS changes
We watch NS, MX, CAA, CNAME, TXT 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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