SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
act-gmbh.de
SSL/TLS Certificate
SSL/TLS Certificate for act-gmbh.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.act-gmbh.de
- Valid from
- Aug 19, 2026
- Valid until
- Nov 17, 2026 (45 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05B3D3A2025E91776087393B0D534E9A7D06
- SHA-256 fingerprint
- 8C:92:AF:E4:70:D0:3D:11:8E:C8:7B:C7:6B:24:F9:4C:94:BC:89:27:2E:92:87:FB:2F:9F:EC:07:A9:8D:0E:B7
- 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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