SSL/TLS Certificate Lookup

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

defgo.net

SSL/TLS Certificate

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SSL/TLS Certificate for defgo.net

Valid
Issued by (CA)
Asseco Data Systems S.A.
Subject
www.defgo.net
Valid from
Jul 10, 2026
Valid until
Jan 25, 2027 (187 days remaining)
Public key
RSA 2048-bit
Serial
5D1A92DE33F57B99343781128FE5B635
SHA-256 fingerprint
95:C7:50:9B:9D:E7:0B:86:2B:DA:ED:9A:9A:AD:0C:C0:93:C3:3A:8C:2A:44:43:22:D4:19:E3:0C:30:26:03:ED
Chain
Certum DV TLS G2 R39 CA → Certum Trusted Root CA → Certum Trusted Network CA
Subject Alternative Names (2)
defgo.net, www.defgo.net

Certificate Authority Authorization (CAA)

CAA restricts issuance to certum.pl; we couldn't map the serving CA (Asseco Data Systems S.A.) to one of these identifiers.