SSL/TLS Certificate Lookup

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

slack-web-chat.com

SSL/TLS Certificate

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SSL/TLS Certificate for slack-web-chat.com

Valid
Issued by (CA)
Let's Encrypt
Subject
slack-web-chat.com
Valid from
Jun 12, 2026
Valid until
Sep 10, 2026 (50 days remaining)
Public key
EC 384-bit
Serial
06DB4F177C824F03F421DED35B93B7FC0F75
SHA-256 fingerprint
35:1C:0E:40:89:F2:12:F1:68:24:91:AA:96:6F:43:2F:7F:F8:83:C6:A5:43:06:47:A1:D2:01:31:8A:A9:40:15
Chain
YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (3)
app.slack-web-chat.com, slack-web-chat.com, www.slack-web-chat.com

Certificate Authority Authorization (CAA)

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