SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
f-d-s.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for f-d-s.co.jp
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- www.f-d-s.co.jp
- Valid from
- Jan 13, 2026
- Valid until
- Feb 14, 2027 (204 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 6041209F009DA3DC2B24CD2E
- SHA-256 fingerprint
- C0:97:56:5B:13:63:FB:B6:69:2A:71:4A:AB:CD:2B:84:C9:D2:F3:23:7A:9E:E5:32:54:4C:4D:B7:2B:B4:84:50
- Chain
- GlobalSign GCC R6 AlphaSSL CA 2025 → GlobalSign → GlobalSign
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by f-d-s.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch f-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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.