SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
nas.ac.jp
SSL/TLS Certificate
SSL/TLS Certificate for nas.ac.jp
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- www.nas.ac.jp
- Valid from
- Aug 30, 2025
- Valid until
- Aug 30, 2026 (38 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0196088FD41F19AF9A62CA5AA4372DBB
- SHA-256 fingerprint
- 67:7B:E7:4E:DB:43:8B:24:5E:8B:3F:AD:2E:9A:11:A0:A7:4A:7D:5E:62:D2:A0:84:2E:26:84:40:D4:A9:99:E5
- Chain
- GlobalSign Atlas R3 AlphaSSL CA 2025 Q3 → GlobalSign
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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This is today's certificate. Turn on monitoring and we'll watch nas.ac.jp continuously, notifying you the moment anything moves across all three signals:
Uptime
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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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