SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
goken-co.jp
SSL/TLS Certificate
SSL/TLS Certificate for goken-co.jp
Valid- Issued by (CA)
- Nijimo K.K.
- Subject
- www.goken-co.jp
- Valid from
- Sep 2, 2025
- Valid until
- Oct 2, 2026 (49 days remaining)
- Public key
- RSA 2048-bit
- Serial
- E00863C04FD1C0C5E03B0C450C6BE878
- SHA-256 fingerprint
- 47:7F:5B:AA:7A:15:F3:0F:7B:59:B5:87:F5:7B:AC:F3:47:A0:EE:54:F8:0A:EB:A0:A0:BC:37:9F:AC:3B:07:B7
- Chain
- FujiSSL SHA2 Domain Secure Site CA → USERTrust RSA Certification Authority → AAA Certificate Services
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by goken-co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch goken-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.