SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
katei-igaku.jp
SSL/TLS Certificate
SSL/TLS Certificate for katei-igaku.jp
Valid- Issued by (CA)
- Amazon
- Subject
- katei-igaku.jp
- Valid from
- Jul 22, 2026
- Valid until
- Feb 4, 2027 (90 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0E2B45DF91B79B1C166560D06731FBD3
- SHA-256 fingerprint
- 98:A7:B1:54:C6:71:3D:46:87:73:9E:BF:F6:33:1A:6C:71:0D:C1:AE:BE:40:45:CC:22:E1:30:96:40:CC:1D:6E
- 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.
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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, 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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