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 st-al.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- st-al.ch
- Valid from
- Aug 28, 2026
- Valid until
- Nov 26, 2026 (60 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 050B334D3B74B8E5B8932ABF323540E98A06
- SHA-256 fingerprint
- 98:3D:2C:04:45:09:6E:05:F0:72:B1:64:9A:BA:A9:F3:8C:43:22:B1:FE:36:84:6B:68:80:BB:A3:CC:C2:65:4B
- 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.
This certificate has been served since Jul 20, 2026.
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This is today's certificate. Turn on monitoring and we'll watch st-al.ch continuously, notifying you the moment anything moves across all three signals:
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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