SSL/TLS Certificate Lookup

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

psi.com

SSL/TLS Certificate

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SSL/TLS Certificate for psi.com

Hostname mismatch

Issued by (CA): Let's Encrypt
Subject: cogentco.com
Valid from: Jun 10, 2026
Valid until: Sep 8, 2026 (49 days remaining)
Public key: RSA 2048-bit
Serial: 06C432ACD66E0CC84823558243A6C36BA20B
SHA-256 fingerprint: 66:24:82:01:78:D0:21:C6:C7:68:61:86:59:FF:78:21:F4:F4:C8:AC:15:4C:8E:4B:EF:FA:1A:9B:92:32:CA:D6
Chain: YR1 → Root YR → ISRG Root X1

Subject Alternative Names (16)

*.cnms.cogentco.com, *.cogentco.com, *.dev.cogentco.com, *.dns.cogentco.com, *.elk.cogentco.com, *.globalpeerconnect.com, *.globalpeerexchange.com, *.lb.cogentco.com, *.ms.cogentco.com, *.prod.cogentco.com, *.rmq.cogentco.com, *.stg.cogentco.com, *.sys.cogentco.com, cogentco.com, globalpeerconnect.com, globalpeerexchange.com

Certificate Authority Authorization (CAA)

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