SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
hagisagi-vineyard.jp
SSL/TLS Certificate
SSL/TLS Certificate for hagisagi-vineyard.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- hagisagi-vineyard.jp
- Valid from
- Oct 1, 2026
- Valid until
- Dec 30, 2026 (48 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06C73D1D0248F2FBAB6965B4D0E1EDEB265C
- SHA-256 fingerprint
- 86:6A:3A:68:83:C7:13:F9:A0:21:DA:09:7C:25:D0:B4:B0:23:A5:7E:59:B4:DD:EB:C9:C9:D6:61:ED:DC:EA:FC
- Chain
- YR2 → Root YR → ISRG Root X1
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, 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.
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