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 d-t-c.de
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- d-t-c.de
- Valid from
- Dec 28, 2025
- Valid until
- Dec 28, 2026 (80 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 7CEE58E4A3FA82A783B7AD2B12EF550C
- SHA-256 fingerprint
- CF:24:07:EF:47:32:EB:1B:F6:87:92:2B:DE:BD:53:6E:0D:16:7F:50:65:53:81:A0:87:B7:34:AB:AE:0A:D3:95
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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This is today's certificate. Turn on monitoring and we'll watch d-t-c.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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