SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
opus1-ag.de
SSL/TLS Certificate
SSL/TLS Certificate for opus1-ag.de
Valid- Issued by (CA)
- Google Trust Services
- Subject
- opus1-ag.de
- Valid from
- Jul 12, 2026
- Valid until
- Oct 10, 2026 (37 days remaining)
- Public key
- EC 256-bit
- Serial
- 742A6FEBEFAC8A2E0E388BDD46BFDF5E
- SHA-256 fingerprint
- 1F:9C:D6:C8:66:E5:C5:89:70:28:47:FC:97:AC:18:FA:A5:B4:B5:9E:BD:0A:E7:F3:67:10:CD:44:21:2B:29:82
- 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 opus1-ag.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch opus1-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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.