SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ddc-deutsch.de
SSL/TLS Certificate
SSL/TLS Certificate for ddc-deutsch.de
Valid- Issued by (CA)
- D-Trust GmbH
- Subject
- www.dnb.de
- Valid from
- Apr 4, 2026
- Valid until
- Oct 19, 2026 (77 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 544CEB237A1D399E13B53DD9F34098BDF31BA876
- SHA-256 fingerprint
- 13:7F:A1:E8:AF:AD:A1:4A:09:D0:38:E1:F1:15:D0:21:09:8A:BF:A7:9F:9B:FF:31:D3:5E:9B:FF:3C:9B:51:4F
- 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, pki.dfn.de, sectigo.com; we couldn't map the serving CA (D-Trust GmbH) to one of these identifiers.
Never get surprised by ddc-deutsch.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ddc-deutsch.de continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
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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