SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dr-leiner.de
SSL/TLS Certificate
SSL/TLS Certificate for dr-leiner.de
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- *.dr-leiner.de
- Valid from
- Dec 20, 2025
- Valid until
- Jan 3, 2027 (113 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 16E3CBC651A4C816DDA7BFA178473D2F
- SHA-256 fingerprint
- 58:CB:AC:FC:53:9D:93:CF:60:9D:21:D9:30:16:07:4B:65:36:AD:2F:6C:A8:1F:9B:62:5A:A2:BE:E2:6C:C0:D6
- 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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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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