SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
leo-sandner.com
SSL/TLS Certificate
SSL/TLS Certificate for leo-sandner.com
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- *.leo-sandner.com
- Valid from
- Sep 10, 2026
- Valid until
- Mar 23, 2027 (175 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 10ABE9DF00E69D9F19F43FF2DC71406E
- SHA-256 fingerprint
- 4E:5B:CA:F6:28:F3:EE:D5:43:D0:84:00:C8:6E:14:CA:CF:0A:E5:DE:DE:7B:4C:E9:2F:9A:07:18:03:DB:D2:C9
- 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.
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This is today's certificate. Turn on monitoring and we'll watch leo-sandner.com 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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