SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for to-ki.jp
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- www.to-ki.jp
- Valid from
- Aug 17, 2026
- Valid until
- Mar 4, 2027 (111 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 35D679D6AD7270ED3520872C
- SHA-256 fingerprint
- 54:15:99:D0:02:79:8F:E7:1F:1A:6D:63:D5:CC:CA:15:89:85:92:0A:04:2A:A1:BD:29:1B:12:5E:A4:A9:15:4D
- Chain
- GlobalSign GCC R46 DV TLS CA 2025 → GlobalSign 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 to-ki.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch to-ki.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.