SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
jan-sheng.com.tw
SSL/TLS Certificate
SSL/TLS Certificate for jan-sheng.com.tw
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- jan-sheng.com.tw
- Valid from
- Sep 1, 2026
- Valid until
- Nov 30, 2026 (40 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05FCD1FADE67B0B08055A6D2C16A21D9B225
- SHA-256 fingerprint
- FA:4E:BB:18:A6:EA:D4:0F:9B:1F:6B:C9:42:7E:DC:13:4A:E6:57:C8:18:DB:DC:F9:F6:4B:F5:02:0D:68:DF:C7
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 20, 2026.
Never get surprised by jan-sheng.com.tw's certificate expiring
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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, 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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