SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
u-works.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for u-works.co.jp
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- www.u-works.co.jp
- Valid from
- Jul 9, 2026
- Valid until
- Jan 24, 2027 (160 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 73D7EFBBA5E63C1DEE5E08BF
- SHA-256 fingerprint
- 6F:DC:2F:AD:96:66:79:54:5A:A7:59:EA:09:D4:99:E9:BD:2F:B9:CD:D1:C3:15:C0:91:C5:7B:51:67:D1:C3:DC
- Chain
- GlobalSign GCC R3 DV TLS CA 2020 → GlobalSign
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by u-works.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch u-works.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.