SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
asp-secretarias.pt
SSL/TLS Certificate
SSL/TLS Certificate for asp-secretarias.pt
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.asp-secretarias.pt
- Valid from
- Jun 6, 2026
- Valid until
- Sep 4, 2026 (32 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 06D3B79BD5D85CB926C046E393DF92D8E440
- SHA-256 fingerprint
- 23:C3:53:29:A4:C1:EA:8B:A5:A5:97:15:C9:09:89:DA:F2:21:E3:7C:E8:C3:6E:4F:38:DA:B5:07:35:66:F0:59
- Chain
- YR1 → 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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