SSL/TLS Certificate Lookup

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

altcom.co.uk

SSL/TLS Certificate

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SSL/TLS Certificate for altcom.co.uk

Valid

Issued by (CA): Sectigo Limited
Subject: *.altcom.co.uk
Valid from: Oct 28, 2025
Valid until: Nov 27, 2026 (125 days remaining)
Public key: RSA 2048-bit
Serial: 328590243949110C71138268B91D919E
SHA-256 fingerprint: 73:55:B6:8E:65:31:42:D7:85:2E:1E:EE:7C:F3:20:47:3F:9A:34:DB:87:9A:F6:81:36:25:2A:67:9D:7F:32:6A
Chain: Sectigo Public Server Authentication CA OV R36 → Sectigo Public Server Authentication Root R46

Subject Alternative Names (2)

*.altcom.co.uk, altcom.co.uk

Certificate Authority Authorization (CAA)

The serving CA (Sectigo Limited) is not among the authorities this domain's CAA records authorize (amazon.com, comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com). This can indicate a misconfiguration or an unexpected issuance.

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Uptime

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DNS changes

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TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

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