SSL/TLS Certificate Lookup

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

SSL/TLS Certificate for i-zimbra.com

Hostname mismatch
Issued by (CA)
Let's Encrypt
Subject
cp05.hosting.zen.net.uk
Valid from
Sep 16, 2026
Valid until
Dec 15, 2026 (88 days remaining)
Public key
RSA 2048-bit
Serial
050FDC432D08D6E0D5C402DE4A36078FFA99
SHA-256 fingerprint
53:6F:03:0F:6F:D9:C2:20:DC:A7:37:C9:83:EC:07:10:BB:9E:37:1D:1B:04:CA:82:C2:9B:41:1C:C2:A1:07:0B
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (4)
cp05.hosting.zen.net.uk, ipv6.cp05.hosting.zen.net.uk, mail.cp05.hosting.zen.net.uk, www.cp05.hosting.zen.net.uk

Certificate Authority Authorization (CAA)

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

This certificate has been served since Aug 25, 2026.

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DNS changes

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TLS certificate

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