SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sema-ag.de
SSL/TLS Certificate
SSL/TLS Certificate for sema-ag.de
Valid- Issued by (CA)
- Google Trust Services
- Subject
- sema-ag.de
- Valid from
- Jul 23, 2026
- Valid until
- Oct 21, 2026 (89 days remaining)
- Public key
- EC 256-bit
- Serial
- C94AF839FFF5EB0F0E0BF4E1DB8E61CE
- SHA-256 fingerprint
- 7A:5D:3B:B3:2B:0C:7B:DB:D2:39:AC:FD:E3:CF:2E:C2:44:D6:5E:70:01:79:F9:20:F7:0C:1C:48:C0:4E:54:33
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by sema-ag.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sema-ag.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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