SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
gov-online.go.jp
SSL/TLS Certificate
SSL/TLS Certificate for gov-online.go.jp
Valid- Issued by (CA)
- DigiCert Inc
- Subject
- gov-online.go.jp
- Valid from
- Sep 18, 2025
- Valid until
- Oct 13, 2026 (83 days remaining)
- Public key
- EC 256-bit
- Serial
- 0E8A31B2025846D538CE6717C7904264
- SHA-256 fingerprint
- 88:BD:8B:94:37:35:D5:38:FA:63:A0:9B:B6:95:03:AA:20:E2:A6:28:78:3C:DC:A9:3C:5A:3B:46:30:9B:53:0F
- Chain
- DigiCert Global G3 TLS ECC SHA384 2020 CA1 → DigiCert Global Root G3
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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