SSL/TLS Certificate Lookup

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

upenn.edu

SSL/TLS Certificate

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SSL/TLS Certificate for upenn.edu

Valid
Issued by (CA)
Let's Encrypt
Subject
upenn.edu
Valid from
Jun 9, 2026
Valid until
Sep 7, 2026 (48 days remaining)
Public key
RSA 2048-bit
Serial
064503471F099CD3B915DF8730AE17EB7E6A
SHA-256 fingerprint
6B:DE:BD:88:6B:41:AA:28:5D:61:8D:77:74:DE:E7:E7:BF:92:30:5A:86:C8:24:5E:CC:7C:3E:30:D8:02:DC:71
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (6)
home.www.upenn.edu, pantheontest.www.upenn.edu, transformation.evp.upenn.edu, upenn.edu, www.transformation.evp.upenn.edu, www.upenn.edu

Certificate Authority Authorization (CAA)

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