SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
k-ai.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for k-ai.co.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- k-ai.co.jp
- Valid from
- Oct 28, 2026
- Valid until
- Jan 26, 2027 (81 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 053A378C2907A0610E94C25FE58417278EE6
- SHA-256 fingerprint
- 80:6E:58:73:98:9D:68:95:FA:EC:C0:48:05:DE:2A:07:A9:B2:BE:57:21:C5:65:59:8D:0D:C1:5C:B8:8D:B1:C4
- Chain
- YR2 → 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-ai.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch k-ai.co.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, CNAME, TXT 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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