SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kyoei-kai.com
SSL/TLS Certificate
SSL/TLS Certificate for kyoei-kai.com
Valid- Issued by (CA)
- Nijimo, Inc.
- Subject
- www.kyoei-kai.com
- Valid from
- Nov 6, 2025
- Valid until
- Dec 6, 2026 (83 days remaining)
- Public key
- RSA 2048-bit
- Serial
- B7822514D8847A921A7BA84C0DFF1B6E
- SHA-256 fingerprint
- 9B:D6:B9:4A:DB:E7:7E:9F:00:39:59:72:25:4C:CD:FD:9D:17:1F:7C:F2:F5:49:66:AE:A0:96:8E:72:0C:D6:75
- Chain
- FujiSSL RSA Domain Validation Secure Server CA 2 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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, 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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