SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sys-ken.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for sys-ken.co.jp
Hostname mismatch- Issued by (CA)
- Microsoft Corporation
- Subject
- *.azurewebsites.net
- Valid from
- Jun 29, 2026
- Valid until
- Dec 26, 2026 (153 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 430070B00214399203CDEC2D6400000070B002
- SHA-256 fingerprint
- 5A:F5:72:1F:99:5B:E5:52:E2:7B:CE:F5:09:02:7B:5E:B5:80:38:88:C5:21:A3:E6:38:81:67:35:61:46:9B:2C
- Chain
- Microsoft TLS G2 RSA CA OCSP 04 → Microsoft TLS RSA Root G2 → DigiCert Global Root G2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by sys-ken.co.jp's certificate expiring
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Uptime
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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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