SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
42-gmbh.de
SSL/TLS Certificate
SSL/TLS Certificate for 42-gmbh.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- 42-gmbh.de
- Valid from
- Sep 8, 2026
- Valid until
- Dec 7, 2026 (70 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06B62EB3A298D9DEA0970F43382E7117B540
- SHA-256 fingerprint
- 63:0B:2D:33:AC:FE:8A:F3:C5:C4:56:EE:53:EA:8F:F6:DC:93:50:65:6C:BF:CA:64:34:D3:4C:81:F0:24:A7:E2
- 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 42-gmbh.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch 42-gmbh.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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