SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
i-u.ac.jp
SSL/TLS Certificate
SSL/TLS Certificate for i-u.ac.jp
Valid- Issued by (CA)
- Amazon
- Subject
- i-u.ac.jp
- Valid from
- Mar 23, 2026
- Valid until
- Oct 6, 2026 (54 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0DAF22A3AF47D37B299B567FBF2920DF
- SHA-256 fingerprint
- ED:D4:C3:0F:82:95:C6:74:AD:CE:70:87:A0:92:0D:85:8E:D5:EF:72:CF:1F:A0:68:17:E0:D3:24:C9:E9:BA:A3
- Chain
- Amazon RSA 2048 M01 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by i-u.ac.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch i-u.ac.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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