SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ad-focus.de
SSL/TLS Certificate
SSL/TLS Certificate for ad-focus.de
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- ad-focus.de
- Valid from
- Mar 4, 2026
- Valid until
- Mar 18, 2027 (212 days remaining)
- Public key
- RSA 2048-bit
- Serial
- E6D17DE79613F3BCBE151269EE76994E
- SHA-256 fingerprint
- FB:9A:45:87:7B:B4:C7:E5:4F:D5:1D:42:AE:8A:F1:BB:E1:5C:6C:06:39:8E:C4:44:D2:EF:29:DB:63:57:50:71
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ad-focus.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ad-focus.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.