SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
opt-kupit.ru
SSL/TLS Certificate
SSL/TLS Certificate for opt-kupit.ru
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- opt-kupit.ru
- Valid from
- Jun 25, 2026
- Valid until
- Sep 23, 2026 (23 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05F91CE8DB49F38F61D421BDF3ABF01E107D
- SHA-256 fingerprint
- 2B:73:43:63:CE:FB:5A:FD:51:82:A8:6A:55:C9:40:58:EF:93:C4:FB:8F:B3:67:AB:10:54:28:F3:AB:CE:B1:6D
- 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.
This certificate has been served since Aug 20, 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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