SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
isao-clinic.jp
SSL/TLS Certificate
SSL/TLS Certificate for isao-clinic.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- isao-clinic.jp
- Valid from
- Sep 16, 2026
- Valid until
- Dec 15, 2026 (35 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 056ACA5C0CE49F741D4AFD8CF96140E0BC9D
- SHA-256 fingerprint
- 72:2B:D0:FC:F6:D3:47:5A:CB:FA:6F:43:83:72:F5:24:1A:FB:4F:9C:96:06:E4:DC:DD:31:A7:3F:34:C6:32:DC
- 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 Sep 23, 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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