SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
seika-corp.jp
SSL/TLS Certificate
SSL/TLS Certificate for seika-corp.jp
Valid- Issued by (CA)
- Google Trust Services
- Subject
- seika-corp.jp
- Valid from
- Sep 6, 2026
- Valid until
- Dec 5, 2026 (79 days remaining)
- Public key
- EC 256-bit
- Serial
- 2FB79968798BB93C13F146A21C944E7D
- SHA-256 fingerprint
- 74:E5:47:E3:27:9D:CA:6E:7C:6F:8B:CA:3F:A4:67:A4:AC:61:A2:92:99:67:62:1A:E6:FA:CD:23:30:42:DB:95
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 12, 2026.
Never get surprised by seika-corp.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch seika-corp.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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