SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
seimei-handan.net
SSL/TLS Certificate
SSL/TLS Certificate for seimei-handan.net
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- seimei-handan.net
- Valid from
- Oct 15, 2026
- Valid until
- Jan 13, 2027 (61 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06B6CBEE3314550C2DFE5620C5A114CD2BD0
- SHA-256 fingerprint
- E0:63:EA:05:8A:72:74:14:99:B3:7E:EB:8A:39:C8:61:CD:13:6E:22:69:0D:EB:F8:94:8F:02:74:92:86:FF:0F
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Oct 26, 2026.
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Uptime
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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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