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 rek39.ru
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- rek39.ru
- Valid from
- Feb 8, 2022
- Valid until
- May 9, 2022 (expired 1544 days ago)
- Public key
- RSA 2048-bit
- Serial
- 032DFDCC3B33D347A0E61AD7F1D38886EB92
- SHA-256 fingerprint
- ED:41:64:96:E4:21:48:8C:60:5F:1B:61:83:C4:A3:5B:64:6B:B9:BE:15:11:3E:FE:E7:78:A8:72:0B:1E:6A:53
- Chain
- R3 → 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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