SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kukan-henshu.jp
SSL/TLS Certificate
SSL/TLS Certificate for kukan-henshu.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- kukan-henshu.jp
- Valid from
- Nov 1, 2026
- Valid until
- Jan 30, 2027 (76 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 069A33F66DFAE14AB2E7F78F91950CE4CE42
- SHA-256 fingerprint
- FF:FC:43:BE:D6:A7:8A:3D:A6:09:24:21:97:67:01:ED:73:BE:BF:77:70:BE:EA:23:BE:F5:DD:98:E5:3B:09:0D
- 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 2 previous certificates for this host. This certificate has been served since Nov 9, 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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