SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
a-design.si
SSL/TLS Certificate
SSL/TLS Certificate for a-design.si
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- cpcalendars.a-design.si
- Valid from
- Aug 17, 2026
- Valid until
- Nov 15, 2026 (73 days remaining)
- Public key
- EC 384-bit
- Serial
- 067251815B653E6A773E610809316851C829
- SHA-256 fingerprint
- 16:1F:C7:66:16:08:44:AE:AC:CF:FC:4A:02:8A:61:9B:52:C6:A2:8B:1E:02:BF:B6:64:89:F4:4C:C5:E6:10:CE
- Chain
- YE1 → 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.
This certificate has been served since Aug 29, 2026.
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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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