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 sem-act.ru

Valid
Issued by (CA)
Let's Encrypt
Subject
sem-act.ru
Valid from
Jul 3, 2026
Valid until
Oct 1, 2026 (62 days remaining)
Public key
EC 256-bit
Serial
0580E831D5A85071901BA96A5CBAF76CEEEF
SHA-256 fingerprint
1F:60:03:73:33:49:6B:00:AE:3B:F3:57:F2:E6:35:D8:D3:9C:17:0D:75:12:D5:1A:6D:53:6E:E0:4C:31:21:E6
Chain
YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (1)
sem-act.ru

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

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TLS certificate

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