SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
wfg-krefeld.de
SSL/TLS Certificate
SSL/TLS Certificate for wfg-krefeld.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- krefeld-business.de
- Valid from
- Jun 12, 2026
- Valid until
- Sep 10, 2026 (40 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 056F63AACA971DD1AFF6AA1FA23D42D44ECF
- SHA-256 fingerprint
- 30:C4:3E:96:D1:D6:45:6E:0C:EC:35:3C:5A:AD:1F:50:1B:CE:0A:E6:D8:F2:F3:16:70:6A:CB:E5:19:87:77:53
- 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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