SSL/TLS Certificate Lookup

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

alexu.dev

SSL/TLS Certificate

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SSL/TLS Certificate for alexu.dev

Valid
Issued by (CA)
Let's Encrypt
Subject
alexu.dev
Valid from
Jul 20, 2026
Valid until
Oct 18, 2026 (88 days remaining)
Public key
RSA 2048-bit
Serial
051681FEA364840ED6F406D374E77F48FD85
SHA-256 fingerprint
E1:2A:EB:4A:41:9A:40:E9:3B:82:91:73:FB:6E:CC:ED:AF:E1:48:16:6E:6F:D8:F5:FD:5D:A3:3C:DB:1D:2C:77
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
alexu.dev, www.alexu.dev

Certificate Authority Authorization (CAA)

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