SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kyohou.jp
SSL/TLS Certificate
SSL/TLS Certificate for kyohou.jp
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- kyohou.jp
- Valid from
- Oct 28, 2025
- Valid until
- Jan 26, 2026 (expired 190 days ago)
- Public key
- RSA 2048-bit
- Serial
- 05FBD4AF93B57A0B123303829C7FF094E6E2
- SHA-256 fingerprint
- 32:5C:9E:B9:77:FC:EA:01:B2:07:1F:BD:06:1E:13:03:34:CB:EB:64:CF:67:B3:7B:69:B7:52:D9:B9:8A:7E:D3
- Chain
- R12 → 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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This is today's certificate. Turn on monitoring and we'll watch kyohou.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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