SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
caina.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for caina.co.jp
Expiring soon- Issued by (CA)
- Let's Encrypt
- Subject
- *.caina.co.jp
- Valid from
- May 14, 2026
- Valid until
- Aug 12, 2026 (17 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0620A3459F292DBF7FD46792895D6F00CA59
- SHA-256 fingerprint
- 65:E2:73:97:D0:18:97:09:60:66:D6:05:AD:29:BD:C9:E5:AE:EB:8F:9C:5F:DF:B0:8A:F5:A1:F2:C8:B0:E5:F6
- Chain
- R12 → 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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