SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
jonan-ex.jp
SSL/TLS Certificate
SSL/TLS Certificate for jonan-ex.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- jonan-ex.jp
- Valid from
- Jul 3, 2026
- Valid until
- Oct 1, 2026 (71 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 052DFD1EAAD6D33443B9315DFB0E8D3EDC62
- SHA-256 fingerprint
- FA:BB:18:CD:89:3D:58:B7:0E:B4:E0:EA:D4:04:F0:6D:F4:C4:34:B9:B3:C0:89:11:CD:D3:18:F7:B2:B9:58:56
- Chain
- YR1 → 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
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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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