SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
f-sta.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for f-sta.co.jp
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- www.f-sta.co.jp
- Valid from
- Oct 31, 2025
- Valid until
- Dec 2, 2026 (66 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 634C813BD823141F7D92670E
- SHA-256 fingerprint
- 2C:59:0D:0F:D9:FD:82:75:D2:7B:6D:78:4A:FB:22:97:50:01:74:FC:65:BC:DD:4A:4C:A3:6F:6E:C5:8A:70:70
- Chain
- GlobalSign GCC R6 AlphaSSL CA 2025 → 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-sta.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch f-sta.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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