SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dfk-gap.de
SSL/TLS Certificate
SSL/TLS Certificate for dfk-gap.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- dfk-gap.de
- Valid from
- Jul 13, 2026
- Valid until
- Oct 11, 2026 (62 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 057442F3F4D64B738C67717EBD13FED22A54
- SHA-256 fingerprint
- A0:54:6E:A1:3D:92:06:8F:73:96:48:D1:37:C1:30:04:DF:77:D1:F4:2F:AE:E2:2F:4C:B2:0A:66:7F:55:C2:D5
- 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.
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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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