SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
c-square.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for c-square.co.jp
Valid- Issued by (CA)
- Amazon
- Subject
- c-square.co.jp
- Valid from
- Jul 3, 2026
- Valid until
- Jan 16, 2027 (133 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0B0AAF2FA58AF435E6F7CF25567B7882
- SHA-256 fingerprint
- 70:90:3E:7D:24:28:88:0B:B2:7F:9F:3D:12:EB:98:84:FD:24:30:1E:3B:27:0E:07:91:80:88:2E:95:3F:22:AC
- Chain
- Amazon RSA 2048 M01 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by c-square.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch c-square.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.