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 active24.cz

Valid
Issued by (CA)
DigiCert Inc
Subject
*.active24.cz
Valid from
Jan 26, 2026
Valid until
Jan 26, 2027 (188 days remaining)
Public key
RSA 4096-bit
Serial
02A82B291DDDB12218005F67850F2508
SHA-256 fingerprint
40:9C:4B:0E:0D:A3:F5:92:78:48:AB:64:70:DD:82:4E:08:1F:B1:FA:E9:0F:45:3C:E0:34:DA:7A:4B:D4:A5:43
Chain
RapidSSL TLS RSA CA G1 → DigiCert Global Root G2
Subject Alternative Names (2)
*.active24.cz, active24.cz

Certificate Authority Authorization (CAA)

The serving CA (DigiCert Inc) is not among the authorities this domain's CAA records authorize (letsencrypt.org, sectigo.com, thawte.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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