SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kc-s.or.jp
SSL/TLS Certificate
SSL/TLS Certificate for kc-s.or.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- kc-s.or.jp
- Valid from
- Jun 3, 2026
- Valid until
- Sep 1, 2026 (39 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05916A0193D19BFC6534386C05ACFD04078F
- SHA-256 fingerprint
- AF:C5:20:DB:E2:59:68:5F:D0:EF:75:30:DF:2A:2D:7C:56:02:82:B0:63:69:10:BB:6D:56:6D:E5:5A:38:E4:3D
- 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.
Never get surprised by kc-s.or.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch kc-s.or.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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