SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for ndk-asia.co.th

Valid
Issued by (CA)
Let's Encrypt
Subject
ftp.ndk-asia.co.th
Valid from
Jun 23, 2026
Valid until
Sep 21, 2026 (57 days remaining)
Public key
EC 384-bit
Serial
05938D9876F6582372AD28CE58DCBBA36FF8
SHA-256 fingerprint
D6:E1:D1:6D:90:A3:3D:A8:FF:CA:49:07:F7:D7:60:50:DF:14:39:DF:FA:13:59:DA:8A:08:EF:E9:42:73:13:95
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
ftp.ndk-asia.co.th, ndk-asia.co.th

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by ndk-asia.co.th's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ndk-asia.co.th 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, 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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.