SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
s-d-s.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for s-d-s.co.jp
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- s-d-s.co.jp
- Valid from
- Jan 15, 2026
- Valid until
- Feb 16, 2027 (186 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 1F9342A3BE4C1E07087082CD
- SHA-256 fingerprint
- 24:67:F8:D3:AB:B5:9A:CD:9F:8F:02:F9:FF:43:BF:BE:2A:38:BE:BE:84:7E:10:6F:2D:B1:06:52:A2:8D:6D:F4
- Chain
- GlobalSign GCC R3 DV TLS CA 2020 → GlobalSign
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by s-d-s.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch s-d-s.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, 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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