SSL/TLS Certificate Lookup

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

opsy.science

SSL/TLS Certificate

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SSL/TLS Certificate for opsy.science

Valid
Issued by (CA)
Let's Encrypt
Subject
opsy.science
Valid from
Jul 12, 2026
Valid until
Oct 10, 2026 (80 days remaining)
Public key
RSA 2048-bit
Serial
05653CB01B5B84EEBAB28C1C9B2B50D6D32F
SHA-256 fingerprint
E9:A7:64:2B:42:E7:C9:FC:56:2E:E0:B9:73:4A:89:3B:D8:8B:CF:E8:D7:80:10:2E:C3:8F:A1:CC:1B:EA:46:20
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (1)
opsy.science

Certificate Authority Authorization (CAA)

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