SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
fukujukaigr.or.jp
SSL/TLS Certificate
SSL/TLS Certificate for fukujukaigr.or.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.fukujukaigr.or.jp
- Valid from
- Jul 18, 2026
- Valid until
- Oct 16, 2026 (64 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 052D0AC56559EA8D5AC2D02972EA890B0280
- SHA-256 fingerprint
- 61:0C:F6:FA:F5:36:F1:1D:95:18:B5:B8:37:88:B6:12:E4:FD:5F:A4:3A:B8:54:58:CD:1C:0E:AA:74:20:75:23
- 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.
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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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