SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ja-kinosato.or.jp
SSL/TLS Certificate
SSL/TLS Certificate for ja-kinosato.or.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ja-kinosato.or.jp
- Valid from
- Nov 2, 2026
- Valid until
- Jan 31, 2027 (86 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05D9E691A4A8EA813314E8C90AEB6DF03472
- SHA-256 fingerprint
- FA:16:1D:A6:22:CD:16:F7:DE:60:9C:5B:26:4C:C3:AA:60:0F:93:B9:B5:A1:B0:75:4F:95:2E:8F:6A:EE:FD:73
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 28, 2026.
Never get surprised by ja-kinosato.or.jp's certificate expiring
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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
We watch NS, MX, CAA, CNAME, TXT 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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