SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for zemar.de
Valid- Issued by (CA)
- ZeroSSL GmbH
- Subject
- zemar.de
- Valid from
- Jul 19, 2026
- Valid until
- Oct 17, 2026 (78 days remaining)
- Public key
- EC 256-bit
- Serial
- BC7507F5F48561B19690EBF9F3A6E00F
- SHA-256 fingerprint
- 0B:06:52:F2:8B:F9:10:A2:FE:FD:70:80:ED:A3:BF:37:BB:4F:05:EA:CD:02:87:89:44:47:AE:DC:D6:3E:1F:24
- Chain
- ZeroSSL ECC DV SSL CA 2 → Sectigo Public Server Authentication Root E46 → USERTrust ECC 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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