SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
yakushi-s.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for yakushi-s.co.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- yakushi-s.co.jp
- Valid from
- Oct 11, 2026
- Valid until
- Jan 9, 2027 (56 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 069C8240CDF1F65212DBA0D235305699FBBC
- SHA-256 fingerprint
- D4:05:9E:BD:F2:92:E8:04:12:04:6D:09:C9:94:19:44:14:AB:79:17:1E:76:83:E2:95:4F:07:70:9C:C5:A4:1E
- 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.
This certificate has been served since Oct 10, 2026.
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Uptime
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DNS changes
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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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