SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
win-da.com.tw
SSL/TLS Certificate
SSL/TLS Certificate for win-da.com.tw
Valid- Issued by (CA)
- Google Trust Services
- Subject
- win-da.com.tw
- Valid from
- Jun 24, 2026
- Valid until
- Sep 22, 2026 (35 days remaining)
- Public key
- EC 256-bit
- Serial
- 02E31239F5C03AD70EC7F26DCFD4FDF8
- SHA-256 fingerprint
- 21:DE:32:CF:E8:A7:F2:74:A6:93:ED:6E:9A:10:8F:C1:FB:F9:D0:5D:8A:83:13:B1:40:AF:EF:B4:7A:44:51:B5
- Chain
- WE1 → GTS Root R4
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 Jul 26, 2026.
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Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
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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