SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
d-fine.de
SSL/TLS Certificate
SSL/TLS Certificate for d-fine.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- d-fine.de
- Valid from
- Jul 23, 2026
- Valid until
- Oct 21, 2026 (86 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05838430A1A160BD5B29E32ED94CA0F26739
- SHA-256 fingerprint
- A1:2A:03:BF:17:0C:F4:39:E7:61:BC:AB:04:38:AB:63:DC:B4:31:21:98:62:1A:A4:DE:39:18:51:E8:71:C8:D6
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by d-fine.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch d-fine.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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