SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
o-kimura.com
SSL/TLS Certificate
SSL/TLS Certificate for o-kimura.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.el-taisho.myserver.mixh.jp
- Valid from
- Aug 9, 2026
- Valid until
- Nov 7, 2026 (61 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 068557751C87210B8F0D4603A79889CCD403
- SHA-256 fingerprint
- 6A:2C:D4:0E:E8:BD:61:39:BA:6E:34:E5:B3:D7:8E:35:82:B2:D9:C3:AF:DF:6C:2E:DF:4D:E7:B6:33:F3:FD:9C
- 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.
Never get surprised by o-kimura.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch o-kimura.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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