SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ts-co.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for ts-co.co.jp
Valid- Issued by (CA)
- Nijimo, Inc.
- Subject
- www.ts-co.co.jp
- Valid from
- Aug 5, 2026
- Valid until
- Feb 19, 2027 (188 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 21D318064F0277D5A961F678A3651B12
- SHA-256 fingerprint
- AD:F4:D0:A3:0E:D0:85:AA:22:60:56:AF:BD:61:6E:B8:D3:98:E8:E9:4E:12:F9:6C:21:59:46:53:41:05:48:9A
- Chain
- FujiSSL RSA Domain Validation Secure Server CA 2 → Sectigo Public Server Authentication Root R46
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ts-co.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ts-co.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.
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