SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
seseragi-foundation.jp
SSL/TLS Certificate
SSL/TLS Certificate for seseragi-foundation.jp
Valid- Issued by (CA)
- Google Trust Services
- Subject
- seseragi-foundation.jp
- Valid from
- Oct 20, 2026
- Valid until
- Jan 18, 2027 (67 days remaining)
- Public key
- EC 256-bit
- Serial
- 4FB41968C7786B4D0E59224CE7004985
- SHA-256 fingerprint
- F9:9B:18:8F:DF:C4:A4:52:EB:6B:09:40:61:12:00:CD:9D:8C:5B:E3:8F:FE:CF:10:10:3E:A1:19:1C:F0:CC:EE
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by seseragi-foundation.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch seseragi-foundation.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, 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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