SSL/TLS Certificate Lookup

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

optik21.com

SSL/TLS Certificate

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SSL/TLS Certificate for optik21.com

Valid
Issued by (CA)
Let's Encrypt
Subject
optik21.com
Valid from
Jun 5, 2026
Valid until
Sep 3, 2026 (44 days remaining)
Public key
RSA 2048-bit
Serial
0622151C10B484EC4822911063BFB34DC102
SHA-256 fingerprint
D7:27:EA:08:51:2E:0B:73:1E:4D:48:47:09:60:6A:DE:79:8D:94:99:32:B2:CE:53:4B:AA:D8:21:A2:52:18:6B
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (2)
optik21.com, www.optik21.com

Certificate Authority Authorization (CAA)

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