SSL/TLS Certificate Lookup

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

massspec.com

SSL/TLS Certificate

WhoisRDAPDNS RecordsCertificateUptimeDiagnosticsHistoryHide Contact Info

SSL/TLS Certificate for massspec.com

Valid
Issued by (CA)
Let's Encrypt
Subject
massspec.com
Valid from
Jun 25, 2026
Valid until
Sep 23, 2026 (64 days remaining)
Public key
RSA 2048-bit
Serial
05FCF6F1D3F3ACD6E02CFD51EF1C0D950D04
SHA-256 fingerprint
13:8B:0F:D2:EE:F4:ED:B9:AF:21:DE:C8:3C:66:5B:7D:F4:C9:64:C8:B5:46:DE:AF:D8:D6:B9:F1:4F:0A:DB:FC
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
massspec.com, www.massspec.com

Certificate Authority Authorization (CAA)

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