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 halfa.de
Valid- Issued by (CA)
- ZeroSSL GmbH
- Subject
- halfa.de
- Valid from
- Aug 4, 2026
- Valid until
- Nov 2, 2026 (38 days remaining)
- Public key
- EC 256-bit
- Serial
- 43B5A1932423C9183DD205ED2D652F12
- SHA-256 fingerprint
- 0E:9D:74:80:D3:7D:2E:AE:49:0C:EA:AC:29:3A:E7:CF:0B:29:55:57:23:BE:76:DE:9B:54:C0:08:C1:BF:82:B0
- 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.
This certificate has been served since Sep 21, 2026.
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Uptime
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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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