SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kohnan-jc.or.jp
SSL/TLS Certificate
SSL/TLS Certificate for kohnan-jc.or.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.kohnan-jc.or.jp
- Valid from
- Sep 27, 2026
- Valid until
- Dec 26, 2026 (83 days remaining)
- Public key
- EC 256-bit
- Serial
- 057394B29946AA41C5C2FE32EF5DB8DEE047
- SHA-256 fingerprint
- BF:C1:AE:90:E6:AB:2C:DD:64:3C:6D:8E:60:0D:7D:E8:72:BA:10:68:67:EF:F9:5B:3D:80:51:DB:43:41:0A:03
- Chain
- YE1 → Root YE → ISRG Root X2 → 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 kohnan-jc.or.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch kohnan-jc.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.