SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ja-itoshima.or.jp
SSL/TLS Certificate
SSL/TLS Certificate for ja-itoshima.or.jp
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- www.ja-itoshima.or.jp
- Valid from
- Jul 21, 2026
- Valid until
- Feb 5, 2027 (91 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 6618D1140BD7DCC99A901658
- SHA-256 fingerprint
- D9:E7:EE:32:46:16:F0:5D:52:99:7B:5D:29:DE:04:D1:1F:DD:0B:4C:92:DB:F7:46:48:3B:87:6B:C5:DE:37:46
- 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.
This certificate has been served since Oct 8, 2026.
Never get surprised by ja-itoshima.or.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ja-itoshima.or.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.