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 essma.fi
Self-signed- Issued by (CA)
- essma
- Subject
- dell-ubuntuserv.essma.local
- Valid from
- Aug 30, 2022
- Valid until
- Aug 30, 2023 (expired 1115 days ago)
- Public key
- RSA 4096-bit
- Serial
- 110282398626456E05A4A07DCDACD078BA40E46A
- SHA-256 fingerprint
- 26:DA:52:C4:F9:26:AF:F0:B9:4D:94:6E:D1:F6:67:7A:F1:07:D4:83:B8:97:A6:C3:62:14:9F:9F:A9:B2:7F:52
- Chain
- dell-ubuntuserv.essma.local
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 Sep 12, 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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