SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
check-in.com.tw
SSL/TLS Certificate
SSL/TLS Certificate for check-in.com.tw
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- check-in.com.tw
- Valid from
- Oct 15, 2026
- Valid until
- Jan 13, 2027 (82 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 059494B03C0DA17201FEC74EC9649523ACC4
- SHA-256 fingerprint
- 39:78:48:AA:DF:1D:91:8D:5E:0D:74:A1:4B:39:72:B0:B3:67:81:57:BD:39:83:B2:DC:4E:06:A3:22:7D:94:3A
- 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.
This certificate has been served since Sep 6, 2026.
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Uptime
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DNS changes
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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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