SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
web-ptt.org.tw
SSL/TLS Certificate
SSL/TLS Certificate for web-ptt.org.tw
Valid- Issued by (CA)
- Google Trust Services
- Subject
- web-ptt.org.tw
- Valid from
- Oct 18, 2026
- Valid until
- Jan 16, 2027 (88 days remaining)
- Public key
- EC 256-bit
- Serial
- 807B223DB70C13C4130488A42AAC2461
- SHA-256 fingerprint
- 20:8B:69:D6:09:E2:14:70:16:6D:99:7A:B6:7C:51:C3:6F:36:FB:F6:4C:D9:22:14:3B:38:D2:99:14:24:91:FB
- Chain
- WE1 → GTS Root R4
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, 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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