SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
k-precision.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for k-precision.co.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- k-precision.co.jp
- Valid from
- Aug 9, 2026
- Valid until
- Nov 7, 2026 (34 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 053ED3E7A51D72D4F3BC577E2CF8E646CD9B
- SHA-256 fingerprint
- BB:68:31:F4:A9:0C:B8:42:D9:49:BA:1D:36:61:71:21:17:4E:99:CD:A2:74:C3:E0:29:9C:EC:D9:BF:90:CF:28
- 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 k-precision.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch k-precision.co.jp 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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