SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ohsawa-grp.com
SSL/TLS Certificate
SSL/TLS Certificate for ohsawa-grp.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.ohsawa-grp.com
- Valid from
- Aug 8, 2026
- Valid until
- Nov 6, 2026 (30 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06CA64E2DF0EB80DD7A97317AC0C9C0E0FB2
- SHA-256 fingerprint
- D9:C6:AF:C4:00:51:AD:41:20:47:2E:74:C2:D6:CB:AB:3F:86:FE:EF:3D:0A:A3:5E:2E:68:77:F0:09:FB:6A:C1
- 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 Sep 20, 2026.
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Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
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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