SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zen-star.com.tw
SSL/TLS Certificate
SSL/TLS Certificate for zen-star.com.tw
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.xn--m1x9u.tw
- Valid from
- Oct 9, 2026
- Valid until
- Jan 7, 2027 (76 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 057FF10C80BCD05D2D10E7AB8B778E07750D
- SHA-256 fingerprint
- D7:DE:37:62:21:92:FE:B8:7B:C6:58:AA:0D:A4:E5:3A:8D:A9:23:0E:17:36:3E:E2:4B:F6:1A:D6:45:35:E1:C6
- 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 19, 2026.
Never get surprised by zen-star.com.tw's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch zen-star.com.tw continuously, notifying you the moment anything moves across all three signals:
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, 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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