SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
k-keikaku.jp
SSL/TLS Certificate
SSL/TLS Certificate for k-keikaku.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- k-keikaku.jp
- Valid from
- Jun 13, 2026
- Valid until
- Sep 11, 2026 (28 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0542FC1F9EF116E1D1154AEE6FFBE2B769CF
- SHA-256 fingerprint
- 34:9E:CE:5A:0A:33:3B:99:87:93:CE:DD:EF:F5:09:0A:7A:59:EA:C8:D4:80:FF:46:F7:92:B1:BE:97:BE:F7:4F
- 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 k-keikaku.jp's certificate expiring
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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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