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 dnb.de
Valid- Issued by (CA)
- D-Trust GmbH
- Subject
- www.dnb.de
- Valid from
- Aug 28, 2026
- Valid until
- Mar 14, 2027 (161 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 4F4446D90EA60E1C0A347A4904ACEA5A94FA6690
- SHA-256 fingerprint
- 04:70:4B:47:36:9B:AD:61:45:7B:19:D5:8B:2A:CA:A4:3B:00:CD:A4:78:C8:AE:22:44:42:28:9D:BB:5B:55:AA
- Chain
- D-TRUST BR CA 2-23-1 2023 → D-TRUST BR Root CA 2 2023 → D-TRUST Root Class 3 CA 2 2009
Certificate Authority Authorization (CAA)
CAA restricts issuance to d-trust.net, harica.gr, letsencrypt.org, pki.dfn.de, sectigo.com, telesec.de; we couldn't map the serving CA (D-Trust GmbH) to one of these identifiers.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 1, 2026.
Never get surprised by dnb.de's certificate expiring
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Uptime
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DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
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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