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 rpk56.ac.th

Valid
Issued by (CA)
Let's Encrypt
Subject
*.rpk56.ac.th
Valid from
Jun 18, 2026
Valid until
Sep 16, 2026 (58 days remaining)
Public key
EC 384-bit
Serial
0521628A8627731813F1A5243E6BE9F0F455
SHA-256 fingerprint
38:01:57:D7:C1:A2:00:42:45:F2:B3:DB:F9:8D:8F:E7:D0:7B:1A:23:5D:73:97:2D:69:D4:BF:2F:67:4F:6A:06
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
*.rpk56.ac.th, rpk56.ac.th

Certificate Authority Authorization (CAA)

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