SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kato-sangyo.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for kato-sangyo.co.jp
Valid- Issued by (CA)
- Google Trust Services
- Subject
- kato-sangyo.co.jp
- Valid from
- Oct 30, 2026
- Valid until
- Jan 28, 2027 (79 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 853CF6031194178809CCD7B1EA6BE6BF
- SHA-256 fingerprint
- 3E:E2:B0:67:B1:66:15:51:5D:C5:18:A2:48:5F:9A:DA:E6:C8:5D:F8:5F:5A:99:32:E4:99:66:41:EB:10:4A:04
- Chain
- WR3 → GTS Root R1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Nov 1, 2026.
Never get surprised by kato-sangyo.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch kato-sangyo.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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.