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 ai-c.ru
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- alfainform.ru
- Valid from
- Sep 25, 2026
- Valid until
- Dec 24, 2026 (52 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05590290613A67BD660FEF35826D7DA534EF
- SHA-256 fingerprint
- C3:AC:E7:41:EE:4B:02:4C:94:67:FD:BA:5B:15:08:8E:6B:A7:F1:CD:69:4E:DE:8E:E3:08:4F:65:9B:0C:4E:13
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Oct 10, 2026.
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Uptime
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DNS changes
We watch NS, MX, CAA, CNAME, TXT 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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