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
- Oct 7, 2026
- Valid until
- Jan 5, 2027 (83 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05C5EA1578A6304F72DE3AC8578CB7BECDEA
- SHA-256 fingerprint
- 65:4D:0C:70:58:D7:6B:84:40:0E:8A:C6:D9:62:FD:04:81:B4:BC:06:A1:99:44:FF:21:0D:97:57:35:92:57:D0
- Chain
- YR1 → 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.
Never get surprised by ohsawa-grp.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ohsawa-grp.com continuously, notifying you the moment anything moves across all three signals:
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
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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