SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sankyo-kasei.co.th
SSL/TLS Certificate
SSL/TLS Certificate for sankyo-kasei.co.th
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- sankyo-kasei.co.th
- Valid from
- Oct 10, 2026
- Valid until
- Jan 8, 2027 (77 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 06CFE019AF085A80DD433B3EF3D928D1CA32
- SHA-256 fingerprint
- D6:0D:E9:7D:73:57:7F:6D:4D:B3:3C:61:66:8F:F8:9C:22:C4:E1:26:C9:70:7C:16:BE:F6:FC:A8:D4:1B:77:1E
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).
We've observed 1 previous certificate for this host. This certificate has been served since Oct 18, 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, 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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