SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
takao-shinkyuin.com
SSL/TLS Certificate
SSL/TLS Certificate for takao-shinkyuin.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- takao-shinkyuin.com
- Valid from
- Oct 5, 2026
- Valid until
- Jan 3, 2027 (72 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 069E28D56DC14BF12B947826C45E3BA6DC63
- SHA-256 fingerprint
- 91:3D:5B:DC:88:4D:EF:B9:76:15:FD:F1:91:A6:5E:1D:43:53:1B:15:91:1B:79:59:F3:A5:31:9E:05:D7:A8:3D
- 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.
This certificate has been served since Sep 15, 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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