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 nts-h.jp
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- www.nts-h.jp
- Valid from
- Dec 30, 2025
- Valid until
- Dec 30, 2026 (156 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0110B17B007F2EA79AFD9CE4FDDCFB08
- SHA-256 fingerprint
- 2A:12:8C:FE:64:7D:D8:49:B5:4B:AC:30:CE:96:AB:2D:EE:47:89:09:CA:EA:7B:A1:C2:DF:7C:C0:DB:21:9A:5B
- Chain
- GlobalSign Atlas R3 AlphaSSL CA 2025 Q4 → 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 nts-h.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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