SSL/TLS Certificate Lookup

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

calcs.org.uk

SSL/TLS Certificate

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SSL/TLS Certificate for calcs.org.uk

Valid
Issued by (CA)
Sectigo Limited
Subject
*.calcs.org.uk
Valid from
Apr 26, 2026
Valid until
Nov 6, 2026 (108 days remaining)
Public key
RSA 2048-bit
Serial
32609F4DFFCDA3516A02C200C0538074
SHA-256 fingerprint
66:4F:42:5F:F9:91:59:8E:DE:50:82:2C:65:F5:3B:0E:06:E9:AA:9B:2C:A7:20:DD:CA:F5:F8:8A:FB:65:69:F6
Chain
Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Subject Alternative Names (2)
*.calcs.org.uk, calcs.org.uk

Certificate Authority Authorization (CAA)

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